Updated on 2025/06/06

写真a

 
GOTOH Kuniaki
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Professor
Position
Professor
External link

Degree

  • Dr. ( Kyoto University )

  • Master of Engineering ( Hiroshima University )

Research Interests

  • Multi phase flow

  • Powder Technology

  • 粉体工学

  • エアロゾル工学

  • Aerosol Technology

  • 混相流工学

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Transport phenomena and unit operations

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Fluid engineering

Education

  • Hiroshima University   工学研究科   移動現象工学専攻 博士後期課程

    1988.4 - 1989.3

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    Country: Japan

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  • Hiroshima University   工学研究科   移動現象工学専攻 博士前期課程

    1986.4 - 1988.3

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  • Hiroshima University   工学部   第三類(化学系)

    1982.4 - 1986.3

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Research History

  • 岡山大学学術研究院   教授

    2022.4

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  • Okayama University   The Graduate School of Natural Science and Technology   Professor

    2004.7 - 2022.3

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  • - Professor,Graduate School of Natural Science and Technology,Okayama University

    2004

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  • - 岡山大学 教授

    2003

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  • - Professor,Okayama University

    2003

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  • Associate Professor,Yamaguchi University

    1997 - 2003

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  • Yamaguchi University   Faculty of Engineering

    1997 - 2003

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  • Assistant Professor,Kyoto University

    1989 - 1997

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  • Kyoto University   Faculty of Engineering

    1989 - 1997

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Professional Memberships

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Committee Memberships

  • Society of Powder Technology, Japan   President  

    2023.3   

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    Committee type:Academic society

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  • 日本粉体工業技術協会   理事  

    2022.5   

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  • ホソカワ粉体工学振興財団   理事  

    2022.4   

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  • 粉体工学情報センター   理事  

    2022.4   

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  • 日本粉体工業   AI技術利用委員会委員  

    2021.4   

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    Committee type:Academic society

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  • 新エネルギー・産業技術総合開発機構   NEDO技術委員  

    2020.4   

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    Committee type:Other

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  • 日本作業環境測定協会   理事  

    2020.4   

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    Committee type:Academic society

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  • 化学工学会 粒子・流体プロセス部会   監事  

    2020.4 - 2022.3   

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    Committee type:Academic society

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  • 日本粉体工業技術協会標準粉体委員会   副委員長  

    2018.4   

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    Committee type:Academic society

    日本粉体工業技術協会標準粉体委員会

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  • 日本粉体工業技術協会計装測定分科会   副コーディネーター  

    2017.4   

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  • 日本粉体工業技術協会   産学技術交流推進部門マネージャー  

    2012.4   

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    Committee type:Academic society

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  • 日本粉体工業技術協会湿式プロセス分科会   副コーディネーター  

    2011.4 - 2017.3   

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    Committee type:Academic society

    日本粉体工業技術協会計装測定分科会

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  • 岡山労働局   粉じん対策指導委員  

    2010.4   

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    Committee type:Municipal

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  • 日本エアロゾル学会   第46回エアロゾル科学技術研究討論会実行委員長  

    2009   

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    Committee type:Academic society

    日本エアロゾル学会

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  • 化学工学会岡山地区化学工学化学工学懇話会   常任幹事  

    2007.4   

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    Committee type:Academic society

    化学工学会岡山地区化学工学化学工学懇話会

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  • 粉体工学会   理事、副会長、企画委員長  

    2007.1 - 2023.3   

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    Committee type:Academic society

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  • 日本化学会中国四国支部   地区幹事  

    2005 - 2006   

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    Committee type:Academic society

    日本化学会中国四国支部

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Papers

  • Qualitative Evaluation of Relation between Mixing Uniformity of Binder and Strength of Compression Molded Tablet Reviewed

    Kuniaki Gotoh, Yuka Yoshimura, Yasushi Mino, Koichi Nakaso

    Journal of the Society of Powder Technology, Japan   60 ( 11 )   663 - 668   2023.11

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Society of Powder Technology, Japan  

    DOI: 10.4164/sptj.60.663

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  • Numerical Simulations of Particle Suspensions under Shear Flow Using a Combined Lattice Boltzmann and Discrete Element Method Reviewed

    Yasushi Mino, Hazuki Tanaka, Koichi Nakaso, Kuniaki Gotoh

    Journal of the Society of Powder Technology, Japan   60 ( 10 )   607 - 612   2023.10

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    Authorship:Last author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Society of Powder Technology, Japan  

    DOI: 10.4164/sptj.60.607

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  • Numerical simulation of a drying colloidal suspension on a wettable substrate using the lattice Boltzmann method Reviewed

    Yasushi Mino, Chika Tanaka, Hazuki Tanaka, Koichi Nakaso, Kuniaki Gotoh

    Chemical Engineering Science   263   118050 - 118050   2022.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.ces.2022.118050

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  • Effect of Spray Temperature Conditions on Droplet Size Distribution by a Rotating Disk Reviewed

    Nanako Harada, Ayumi Shimizu, Koichi Nakaso, Yasushi Mino, Kuniaki Gotoh

    KAGAKU KOGAKU RONBUNSHU   48 ( 5 )   167 - 174   2022.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Society of Chemical Engineers, Japan  

    DOI: 10.1252/kakoronbunshu.48.167

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  • Lattice Boltzmann model for capillary interactions between particles at a liquid-vapor interface under gravity Reviewed

    Yasushi Mino, Hazuki Tanaka, Koichi Nakaso, Kuniaki Gotoh, Hiroyuki Shinto

    PHYSICAL REVIEW E   105 ( 4 )   2022.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevE.105.045316

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  • Direct numerical simulation of permeation of particles through a realistic fibrous filter obtained from X-ray computed tomography images utilizing signed distance function

    Mohammad Irwan Fatkhur Rozy, Yuto Maemoto, Masaki Ueda, Tomonori Fukasawa, Toru Ishigami, Kunihiro Fukui, Mikio Sakai, Yasushi Mino, Kuniaki Gotoh

    Powder Technology   385   131 - 143   2021.6

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.powtec.2021.02.072

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  • Evaluation of Flowability of Wet Granular Materials by Stirring Torque: Effects of Additive Liquid Viscosity on Flowability Reviewed

    三野泰志, 新倉丸也, 中曽浩一, 後藤邦彰

    粉体工学会誌   58 ( 5 )   234 - 237   2021.5

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

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  • Development of Chemical Cold Generation System from Unused Thermal Energy Reviewed

    中曽浩一, 筒井優衣, 高橋秀和, 三野泰志, 後藤邦彰, 丸岡伸洋, 埜上洋

    鉄と鋼   106 ( 8 )   556 - 563   2020.8

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  • Characteristic Capillary Diameter to Evaluate Capillary Pressure of Ordered Particle Structures Based on Simulation of Two-Phase Flow Reviewed

    山本知世, 三野泰志, 中曽浩一, 後藤邦彰

    粉体工学会誌   57 ( 8 )   417 - 423   2020.8

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  • Numerical Simulation of Wetting Phenomena on Solid Surface Using Free-energy Lattice Boltzmann Method Reviewed

    山本知世, 三野泰志, 中曽浩一, 後藤邦彰

    粉体工学会誌   56 ( 10 )   550 - 555   2019.10

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  • 青色無機顔料コバルトブルーの色調におよぼすコバルト原料化合物の影響 Reviewed

    米田 美佳, 辰己 祐哉, 三野 泰志, 中曽 浩一, 後藤 邦彰, 中西 真, 藤井 達生, 小西 康裕, 野村 俊之

    粉体工学会誌   56 ( 8 )   446 - 451   2019.8

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  • Solid-state synthesis and characterization of cobalt blue core-shell pigment particles Reviewed

    Mika Yoneda, Kuniaki Gotoh, Makoto Nakanishi, Tatsuo Fujii, Yasuhiro Konishi, Toshiyuki Nomura

    JOURNAL OF THE AMERICAN CERAMIC SOCIETY   102 ( 6 )   3468 - 3476   2019.6

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    DOI: 10.1111/jace.16191

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  • Influence of surface roughness created by admixing smaller particles on improving discharge particle flowability of main particles Reviewed

    Mikio Yoshida, Tatsuki Katayama, Ryota Kikuchi, Jun Oshitani, Kuniaki Gotoh, Atsuko Shimosaka, Yoshiyuki Shirakawa

    Advanced Powder Technology   30 ( 1 )   156 - 163   2019.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.apt.2018.10.018

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  • Influence of cobalt source compounds on the color tone of cobalt blue inorganic pigment

    Mika Yoneda, Yuya Tatsumi, Yasushi Mino, Koichi Nakaso, Kuniaki Gotoh, Makoto Nakanishi, Tatsuo Fujii, Yasuhiro Konishi, Toshiyuki Nomura

    Journal of the Society of Powder Technology, Japan   56 ( 8 )   446 - 451   2019

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    DOI: 10.4164/sptj.56.446

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  • 被覆粒子から固相合成したコアシェル構造コバルトブルー顔料の色調におよぼす被覆混合条件の影響 Reviewed

    辰巳祐哉, 米田美佳, 三野泰志, 中曽浩一, 後藤邦彰, 野村俊之

    粉体工学会誌   55 ( 3 )   165 - 170   2018.3

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  • Influence of aluminum source on the color tone of cobalt blue pigment Reviewed

    Mika Yoneda, Kuniaki Gotoh, Makoto Nakanishi, Tatsuo Fujii, Toshiyuki Nomura

    Powder Technology   323   574 - 580   2018.1

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  • Effects of main particle diameter on improving particle flowability for compressed packing fraction in a smaller particle admixing system Reviewed

    Mikio Yoshida, Atsushi Misumi, Jun Oshitani, Kuniaki Gotoh, Atsuko Shimosaka, Yoshiyuki Shirakawa

    ADVANCED POWDER TECHNOLOGY   28 ( 10 )   2542 - 2548   2017.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.apt.2017.07.004

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  • Airborne particles released by crushing CNT composites Reviewed

    Isamu Ogura, Chihiro Okayama, Mari Kotake, Seisuke Ata, Yasuto Matsui, Kuniaki Gotoh

    Journal of Physics: Conference Series   838   2017.7

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  • 固気流動層内での密度偏析における最下層への低密度粉体の取り込みの有無 Reviewed

    林省吾, 押谷潤, 後藤邦彰

    粉体工学会誌   54 ( 2 )   97 - 103   2017.2

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.4164/sptj.54.97

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  • DEM simulation and analysis of the effects of adhesive forces and rotations of admixed particles on improving main particle flowability Reviewed

    Mikio Yoshida, Ryota Takatsuki, Genta Sakamoto, Jun Oshitani, Kuniaki Gotoh

    ADVANCED POWDER TECHNOLOGY   27 ( 5 )   2084 - 2093   2016.9

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    DOI: 10.1016/j.apt.2016.07.021

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  • Evaluation of Particle Adhesiveness Using the Shear Stress Induced by Pulling a Rod across a Compressed Particle Bed Reviewed

    Yoshida Mikio, Yokoyama Tatsuya, Oshitani Jun, Gotoh Kuniaki

    Journal of the Society of Powder Technology, Japan   53 ( 6 )   386 - 390   2016.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Society of Powder Technology, Japan  

    A new apparatus was developed for the evaluation of particle adhesiveness. This apparatus uses shear stress that is induced by pulling a rod across a compressed particle bed. The tested samples were spherical silica particles with number based median diameters of 0.4 and 2.8μm. <br>When the height of the particle bed ≥ 17.0mm and the length of the rod in the bed ≥ 11.5mm, the shear stresses obtained by this apparatus were independent of either values of the bed height or the length of the rod. Using the values of stress, the inter-particle shear forces were calculated. The calculated forces increased with packing fraction and reached asymptotic values. The order of the asymptotic values agreed with that of the theoretical values of van der Waals force. This would be because frictional forces are based on adhesive forces in the real contact area (not the apparent contact area) of the 2 bodies. Thus, the new apparatus could be used to evaluate particle adhesiveness reflecting van der Waals force.

    DOI: 10.4164/sptj.53.386

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  • Enhancement of Particle Removal Performance of High-speed Air Jet by Setting Obstacle in Jet Flow Reviewed

    Kuniaki Gotoh, Kenta Mizutani, Yoshiaki Tsubota, Jun Oshitani, Mikio Yoshida, Ken Inenaga

    PARTICULATE SCIENCE AND TECHNOLOGY   33 ( 5 )   567 - 571   2015.9

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/02726351.2015.1060653

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  • Effects of an adhesive force of admixed particles on compressed packing fractions in a particle bed Reviewed

    Yoshida Mikio, Sanagawa Tomoya, Okano Shun-ichiro, Yamamoto Hiroaki, Oshitani Jun, Gotoh Kuniaki, Paul Jonas, Koch Thomas, Peukert Wolfgang

    ADVANCED POWDER TECHNOLOGY   26 ( 2 )   626 - 631   2015.3

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    DOI: 10.1016/j.apt.2015.01.014

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  • 固相反応法により合成したコバルトブルーの色調に及ぼす原料混合時間と焼成温度の影響 Reviewed

    米田美佳, 吉田幹生, 後藤邦彰, 辻広美, 中西真, 藤井達生, 野村俊之

    粉体工学会誌   51 ( 9 )   629 - 634   2014.9

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    DOI: 10.4164/sptj.51.629

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  • プロピル基に表面改質した固体壁とシリカ粒子間の付着力に及ぼす改質条件の影響 Reviewed

    吉田幹生, 日高弘喜, 石田尚之, 押谷潤, 後藤邦彰

    粉体工学会誌   51 ( 9 )   635 - 640   2014.9

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.4164/sptj.51.635

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  • 難流動性粒子の流動性評価に向けた新規装置の開発 Reviewed

    吉田幹生, 古江奈々子, 押谷潤, 後藤邦彰

    化学工学論文集   40 ( 5 )   376 - 381   2014.9

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  • Development of a New Apparatus for Evaluating Flowability of Particle with Poor Flow Behavior Reviewed

    Mikio Yoshida, Nanako Furue, Jun Oshitani, Kuniaki Goto

    KAGAKU KOGAKU RONBUNSHU   40 ( 5 )   376 - 381   2014

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    DOI: 10.1252/kakoronbunshu.40.376

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  • Effects of Filler Mixing Methods on Properties of Polypropylene/Talc/Calcium Carbonate Composite Materials Reviewed

    25 ( 9 )   432 - 437   2013.9

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  • Thermal Oxidation Degradation Behavior of Polypropylene Filled with Calcium Carbonate Reviewed

    25 ( 7 )   349 - 355   2013.7

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  • Development of Thickener-Modeled Dry Dense Medium Separator for High-Speed and Low-maintenance Separation Reviewed

    YOSHIDA Mikio, SHIRAISHI Takafumi, OKAMOTO Kenta, OSHITANI Jun, GOTOH Kuniaki

    Chemical engineering   39 ( 3 )   178 - 183   2013.5

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Society of Chemical Engineers, Japan  

    A thickener-modeled dry dense medium separator using a gas-solid fluidized bed was developed in which materials of different specific gravity float or sink in the bed and can be withdrawn by overflow or underflow. This system is expected to allow high-speed separation and low-maintenance operation compared with a conventional dry dense medium separator, because there are no moving parts for withdrawing floats and sinks from the bed. The effects of overflow/underflow rate and sample feed rate on the performance of the separator were investigated using silica sand as a fluidized bed medium and 20-mm diameter spheres of various specific gravities as samples for separation. It was found that when the overflow/underflow rate was 0.44 or less, the float-sink boundary was smaller than when there was no overflow and no underflow, but float-sink sharpness was maintained. On the other hand, when the overflow/underflow rate was 0.64 or more, the float-sink boundary was similar to that in the case of no flow, but separation sharpness deteriorated. Furthermore, when the overflow/underflow rate was 0.44 and the feeding rate was 0.035 kg/s (=2.2 m3-object/(m2·h): volume-based separation speed per fluidized bed area) or less, Newton efficiencies were more than 0.9. Compared with conventional apparatus, the separation speed of the present apparatus was 3.4 times higher. Hence, this withdrawing system can be valuable for increasing separation speed and reducing the need for maintenance.

    DOI: 10.1252/kakoronbunshu.39.178

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    Other Link: https://jlc.jst.go.jp/DN/JALC/10018806020?from=CiNii

  • Release characteristics of single-wall carbon nanotubes during manufacturing and handling Reviewed

    I. Ogura, M. Kotake, N. Hashimoto, K. Gotoh, A. Kishimoto

    NANOSAFE 2012: INTERNATIONAL CONFERENCES ON SAFE PRODUCTION AND USE OF NANOMATERIALS   429   012057   2013.4

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1088/1742-6596/429/1/012057

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  • Effects of the agglomerated states and the gap of coverage for admixed particles on particle-bed packing fractions Reviewed

    Yoshida Mikio, Yamamoto Hiroaki, Oshitani Jun, Gotoh Kuniaki

    ADVANCED POWDER TECHNOLOGY   24 ( 2 )   560 - 564   2013.3

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    DOI: 10.1016/j.apt.2013.01.004

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  • スクリューフィーダーの粉体供給性能の相関に必要な粉体特性の検討 Reviewed

    後藤 邦彰, 高橋 稔尚, 吉田 幹生, 押谷 潤, 赤坂 真吾

    粉体工学会誌   49 ( 11 )   810 - 817   2012.11

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    DOI: 10.4164/sptj.49.810

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  • Influence of air bubble size on float-sink of spheres in a gas-solid fluidized bed Reviewed

    Oshitani Jun, Isei Yuhei, Yoshida Mikio, Gotoh Kuniaki, Franks George V

    ADVANCED POWDER TECHNOLOGY   23 ( 1 )   120 - 123   2012.1

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    DOI: 10.1016/j.apt.2011.08.002

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  • Improvement of dry float-sink separation of smaller sized spheres by reducing the fluidized bed height Reviewed

    Oshitani Jun, Kawahito Tetsuya, Yoshida Mikio, Gotoh Kuniaki, Franks George V

    ADVANCED POWDER TECHNOLOGY   23 ( 1 )   27 - 30   2012.1

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    DOI: 10.1016/j.apt.2010.11.013

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  • Rod-shaped Hydroxyapatite Nanoparticle Formation by Maturation with AOT Reviewed

    Oshitani Jun, Kataoka Nobuhide, Yoshida Mikio, Gotoh Kuniaki, Imamura Koreyoshi

    CHEMISTRY LETTERS   40 ( 10 )   1085 - 1086   2011.10

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    DOI: 10.1246/cl.2011.1085

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  • 平板上昇に起因する粉体層からの粒子飛散現象の実験的検討 Reviewed

    後藤邦彰, 松田智子, 吉田幹生, 押谷潤, 小倉勇

    化学工学論文集   37 ( 4 )   317 - 322   2011.9

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  • Rod-shaped Hydroxyapatite Nanoparticle Formation Using AOT and Water without Oil Reviewed

    Jun Oshitani, Nobuhide Kataoka, Mikio Yoshida, Kuniaki Gotoh, Koreyoshi Imamura, Hidekazu Tanaka

    CHEMISTRY LETTERS   40 ( 4 )   400 - 401   2011.4

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    DOI: 10.1246/cl.2011.400

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  • Fluidized Bed Medium Separation (FBMS) using the particles with different hydrophilic and hydrophobic properties Reviewed

    Yoshida Mikio, Oshitani Jun, Tani Keiichiro, Gotoh Kuniaki

    ADVANCED POWDER TECHNOLOGY   22 ( 1 )   108 - 114   2011.1

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    DOI: 10.1016/j.apt.2010.10.008

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  • The influence of the density of a gas-solid fluidized bed on the dry dense medium separation of lump iron ore Reviewed

    Jun Oshitani, Tetsuya Kawahito, Mikio Yoshida, Kuniaki Gotoh, George V. Franks

    MINERALS ENGINEERING   24 ( 1 )   70 - 76   2011.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.mineng.2010.10.010

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  • Experimental Investigation of Particle Resuspension from a Powder Layer Induced by an Ascending Flat Object Reviewed

    Gotoh Kuniaki, Matsuda Satoko, Yoshida Mikio, Oshitani Jun, Ogura Isamu

    KAGAKU KOGAKU RONBUNSHU   37 ( 4 )   317 - 322   2011

  • Effect of Diameter Ratio of 2-component Silica Particle on Coagulation State in a Liquid Fluid Field Reviewed

    YOSHIDA Mikio, MORIMOTO Makoto, OSHITANI Jun, GOTOH Kuniaki

    Journal of the Society of Powder Technology,Japan   47 ( 7 )   458 - 465   2010.7

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.4164/sptj.47.458

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  • Difference in Screening Effect of Alkali Metal Counterions on H-AOT-Based W/O Microemulsion Formation Reviewed

    Oshitani Jun, Takashina Shiho, Yoshida Mikio, Gotoh Kuniaki

    LANGMUIR   26 ( 4 )   2274 - 2278   2010.2

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  • Dry Dense Medium Separation of Aluminum and Non-aluminum in Waste Mixed Metals Using a Gas-Solid Fluidized Bed Reviewed

    中務真吾, 山川直也, 図師竜也, 久保泰雄, 吉田幹生, 後藤邦彰, 押谷潤

    粉体工学会誌   47 ( 2 )   92 - 97   2010.2

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    DOI: 10.4164/sptj.47.92

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  • A method for dispersing dry nano-sized particles in a liquid using carrier particles Reviewed

    Kuniaki Gotoh, Takashi Kawazu, Mikio Yoshida, Jun Oshitani

    ADVANCED POWDER TECHNOLOGY   21 ( 1 )   34 - 40   2010.1

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    DOI: 10.1016/j.apt.2009.10.004

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  • Decrease of Cl contents in waste plastics using a gas-solid fluidized bed separator Reviewed

    Mikio Yoshida, Shingo Nakatsukasa, Masaaki Nanba, Kuniaki Gotoh, Tatsuya Zushi, Yasuo Kubo, Jun Oshitani

    ADVANCED POWDER TECHNOLOGY   21 ( 1 )   69 - 74   2010.1

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  • Phase behavior and size variation of Na-AOT-based W/O microemulsions by increasing NaOH concentration in the water pool Reviewed

    Jun Oshitani, Shiho Takashina, Mikio Yoshida, Kuniaki Gotoh

    ADVANCED POWDER TECHNOLOGY   20 ( 6 )   554 - 557   2009.11

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  • Contribution of Na+ counterions to H-AOT&Na-AOT-based W/O microemulsion formation using aqueous NaOH solutions as estimated by pyranine absorbance Reviewed

    Jun Oshitani, Shiho Takashina, Mikio Yoshida, Kuniaki Gotoh

    COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS   350 ( 1-3 )   136 - 140   2009.10

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    DOI: 10.1016/j.colsurfa.2009.09.020

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  • Electroorganic synthesis in oil-in-water (O/W) nanoemulsion: TEMPO-mediated electrooxidation of amphiphilic alcohols in water Reviewed

    Manabu Kuroboshi, Tomonori Yoshida, Jun Oshitani, Kuniaki Goto, Hideo Tanaka

    TETRAHEDRON   65 ( 34 )   7177 - 7185   2009.8

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    DOI: 10.1016/j.tet.2009.06.005

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  • 乾式比重分離装置の分離効率に及ぼす物体投入高さの影響 Reviewed

    吉田幹生, 中務真吾, 後藤邦彰, 図師竜也, 久保泰雄, 押谷潤

    化学工学論文集   35 ( 3 )   274 - 278   2009.5

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  • Influence of Airflow at the Bottom of a Gas-Solid Fluidized Bed on Float and Sink of Objects Reviewed

    NAKATSUKASA Shingo, YAMAKAWA Naoya, ZUSHI Tatsuya, KUBO Yasuo, YOSHIDA Mikio, GOTOH Kuniaki, OSHITANI Jun

    Journal of the Research Association of Powder Technology, Japan   46 ( 3 )   56 - 61   2009.3

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    In this study, float-sink of chlorine containing and not-containing plastics in a gas-solid fluidized bed of silica sand was studied with and without joints in the air distributor and by changing the amount of objects loaded on the air distributor. The float-sink was evaluated using three parameters, i.e., recovery, purity and efficiency. The values obtained with the joints are smaller than without the joints, and decreased with increasing the amount of objects on the distributor. Because there is no airflow at the joints, the sand on the joints is not fluidized and circulating flow of the sand is generated over the area other than the joints. A 2D fluidized bed showed that air bubbles are not uniformly generated on the air distributor and the fluidization of the sand becomes intense when the objects are on the distributor. These results indicate that the circulating flow and the sudden intense fluidization disturb the expected float-sink of objects.

    DOI: 10.4164/sptj.46.206

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  • 固気流動層内での物体浮沈に及ぼす粒度偏析と物体投入高さの影響 Reviewed

    吉田幹生, 中務真吾, 後藤邦彰, 押谷潤

    化学工学論文集   46 ( 3 )   56 - 61   2009.3

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  • 粉体表面改質処理による表面自由エネルギー変化が粉体流動性に及ぼす影響

    岡野 俊一郎, 吉田 幹生, 押谷 潤, 後藤 邦彰

    化学工学会 研究発表講演要旨集   2009   96 - 96   2009

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    DOI: 10.11491/scej.2009.0.96.0

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  • Water Pool pH of AOT-Based W/O Microemulsions at Various Water Contents Estimated by Absorbance Ratio of Pyranine Reviewed

    Jun Oshitani, Shiho Takashina, Mikio Yoshida, Kuniaki Gotoh

    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN   41 ( 6 )   507 - 512   2008.12

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    DOI: 10.1252/jcej.07we287

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  • Effect of Target Plate Scanning on the Removal of Adhered Particles by a High-speed Air Jet Reviewed

    Okazaki Mineya, Kusumura Reiko, Yoshida Mikio, Oshitani Jun, Gotoh Kuniaki

    Journal of the Research Association of Powder Technology, Japan   45 ( 10 )   690 - 696   2008.10

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    Removal of single particles adhering on a flat plate by a high-speed air jet has been investigated experimentally. Although jet nozzle or removal target is scanned in an industrial application of the air jet removal, almost all previous fundamental investigations for the air jet removal were carried out with a fixed nozzle and a fixed target. Therefore, we aimed at elucidating how the scanning speed of target flat plate affects the removal efficiency.<br>Experimental results showed that the removal efficiencies at a constant air pressure of the nozzle decreased with an increase in the scanning speed of the target plate. With an increase in the scanning speed, the residence time of adhered particles in the effective jet exposure area is decreased. Therefore, the decrease in the removal efficiency with an increase of the scanning speed is caused mainly by a decrease in the residence time in the impinging air jet. It was also found that the effective area can be estimated by the equation of stable removal region on a fixed target.

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  • 高速気流による表面付着粒子の除去に対するパルスエアの効果 Reviewed

    岡崎峰也, 吉田幹生, 押谷潤, 後藤邦彰

    粉体工学会誌   45 ( 5 )   294 - 304   2008.5

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    DOI: 10.4164/sptj.45.297

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  • Phase behavior and size variation of AOT-based W/O microemulsions by substituting H+ for Na+ as the counterion Reviewed

    Colloid and Surfaces A: Physicochemical and Engineering Aspects   325   52 - 56   2008.4

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  • Effects of Fe-AOT complex on the properties of iron oxide particles formed by an AOT isooctane/water emulsion system Reviewed

    J. Oshitani, I. Hatai, M. Yoshida, K. Gotoh

    Asia-Pacific Journal of Chemical Engineering   3 ( 3 )   250 - 254   2008.3

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    DOI: 10.1002/apj.143

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  • Electroorganic synthesis in oil-in-water nanoemulsion: TEMPO-mediated electrooxidation of amphiphilic alcohols in water Reviewed

    Tomonori Yoshida, Manabu Kuroboshi, Jun Oshitani, Kuniaki Gotoh, Hideo Tanaka

    SYNLETT   ( 17 )   2691 - 2694   2007.10

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    DOI: 10.1055/s-2007-991070

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  • Crystallization Conditions of Crystal Agglomerates Suitable for Filtration Separation Reviewed

    MUKUTA Takashi, SHIMOJO Yoshitaka, GOTOH Kuniaki

    Journal of the Society of Powder Technology,Japan   43 ( 12 )   882 - 889   2006.12

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    DOI: 10.4164/sptj.43.882

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  • Control of Apparent Specific Gravity in Binary Particle Systems of Gas-Solid Fluidized Bed Reviewed

    Yoshida Mikio, Oshitani Jun, Ono Keiko, Ishizashi Miki, Gotoh Kuniaki

    Journal of the Research Association of Powder Technology, Japan   43 ( 8 )   567 - 576   2006.8

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    Fluidized bed medium separation (FBMS) was applied to separate objects with a small specific gravity difference by precisely controlling the apparent specific gravity of gas-solid fluidized bed with binary particle systems. The binary systems of particles with various specific gravities and diameters were employed, and the apparent specific gravity of fluidized bed, gfb and the dispersion, Δgfb, were measured by changing the bulk volume fraction of heavier particle, Vhp, and the superficial air velocity, u0. It was found that gfb can be controlled by Vhp and u0 because gfb varies with the total mass of particles and the bed expansion. On the other hand, since Δgfb is determined by the extent of segregation of fluidized particles and the fluidization intensity, Δgfb decreases with reducing the extent of the segregation and the vertical fluctuation of fluidized bed surface. The experimental results showed that practical fluidized conditions for FBMS are in the range of gfb≈0.5-3.8 and Δgfb≤0.1. Under these fluidized conditions, plastics with a small difference in specific gravity (0.04-0.24) were almost completely separated at the top and the bottom of the fluidized bed.

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  • Fluidized Bed Medium Separation (FBMS) Using Particles with Different Hydrophilic and Hydrophobic Properties Reviewed

    Yoshida Mikio, Oshitani Jun, Tani Keiichiro, Gotoh Kuniaki

    Journal of the Research Association of Powder Technology, Japan   43 ( 4 )   252 - 259   2006.4

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    Three kinds of particles with different hydrophilic and hydrophobic properties were used as fluidized particles of Fluidized Bed Medium Separation (FBMS). Minimum fluidization velocity, apparent specific gravity of fluidized bed and floating-sinking behaviors of dry and wet coals were measured in order to investigate the stability of fluidization by changing relative humidity of air flow introduced from the bottom of the fluidized bed. The fluidization of hydrophilic particles became unstable with increasing the relative humidity, because particle aggregation took place at a high humidity. On the other hand, the fluidization of highly hydrophobic particles was stable with wet coals even at a high humidity. Therefore, the FBMS with highly hydrophobic particles is applicable to the density separation of coals at a high relative humidity without a control device for the relative humidity.

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  • コンクリート廃材リサイクルのためのモルタルと砂利の乾式比重分離 Reviewed

    吉田 幹生, 押谷 潤, 奥田一行, 大石浩之, 後藤 邦彰

    粉体工学会誌   43   567 - 576   2006.4

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    DOI: 10.4164/sptj.43.260

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  • Fluidized bed medium separation (FBMS) of Cl-containing plastics in home electric appliance shredder residue Reviewed

    Mikio Yoshida, Jun Oshitani, Ken-ichi Kaname, Kuniaki Gotoh

    KAGAKU KOGAKU RONBUNSHU   32 ( 2 )   115 - 121   2006.3

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  • 家電シュレッダーダストからの塩素含有プラスチックの乾式比重分離 Reviewed

    吉田 幹生, 押谷 潤, 要 賢一, 後藤 邦彰

    化学工学論文集   32 ( 2 )   115 - 121   2006.3

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  • 人工筋肉型アクチュエータSMA編み構造の力学特性 Reviewed

    齊藤俊, Qiongli JI, 後藤邦彰

    日本機会学会論文集(C編)   71 ( 707 )   219 - 225   2005.7

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    DOI: 10.1299/kikaic.71.2321

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  • Application of Fluid Penetration Method to Evaluation of Non-uniformity of Particle Bed Structure

    Gotoh Kuniaki, Daikoku Tatsuo, Nishimura Tatsuo

    Journal of the Research Association of Powder Technology, Japan   42 ( 9 )   613 - 618   2005

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    Fluid penetration method is applied in order to evaluate the non-uniformity of a particle bed structure. The apparatus developed consists of a cubic sample box which can be set on either surface. The pressure drops across the packed bed in the packing direction and its perpendicular direction were measured. The fluid penetration resistance in gravitational direction (=packing direction) was higher than that in the perpendicular direction, and the difference depended on the particle size and shape.<br>In order to find the relationship between the differences and the orientation of particles to the packing direction in a packed bed, experiments were conducted using a model packed bed consisting of uniform cylinders with a diameter of 4mm and a length of 100mm. A correlation was obtained between the orientation angle of cylinder axis to the packing direction and the ratio of specific surface area in perpendicular direction to that in the gravitational direction which were determined by the pressure drop measurements. Non-uniformity of a packed bed structure can be evaluated with the orientation angle to the packing direction using the obtained correlation.

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  • Influence of thermal convection on particle behavior in solid-liquid suspensions Reviewed

    K Gotoh, S Yamada, T Nishimura

    ADVANCED POWDER TECHNOLOGY   15 ( 5 )   499 - 514   2004.9

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    DOI: 10.1163/1568552042000237

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  • Effect of Particle Shape on the Reverse Combustion Process of a Packed Bed Reviewed

    Yoshiyuki Yamada, Kuniaki Gotoh, Tatsuo Nishimura

    Kagaku Kogaku Ronbunshu   29 ( 4 )   500 - 507   2003.7

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    DOI: 10.1252/kakoronbunshu.29.500

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  • Comparison between Spherical and Non-spherical Particles in Reverse Combustion Processes of Packed Bed. Reviewed

    Yamada Yoshiyuki, Nakamura Yuichi, Gotoh Kuniaki, Nishimura Tatsuo

    Journal of the Research Association of Powder Technology, Japan   39 ( 10 )   743 - 750   2002.10

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    The effect of fuel particle shape on the reverse combustion process of a packed bed was investigated through the comparison of combustion of spherical-particle packed bed and non-spherical particle bed. In the experiment, we measured the combustion propagation rate at various superficial gas velocties by using the spherical and non-spherical granular activated carbon particles consisting of the same primary particles. Experimental results showed that the propagation rate of non-spherical particles was higher than that of spherical particles with the same diameter measured by sieves and that the rate of smaller particles was higher than that of larger particles. The combustion propagation rates were well correlated by the equivalent specific surface area obtatined by penetration method. This implies that the effect of particle shape on the reverse combustion of packed bed can be estimated by the penetration method.

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  • Effect of orientation of chain-like agglomerated particles on pressure drop in solid-liquid flow systems Reviewed

    Kuniaki Gotoh, Hiroyuki Watakabe, Tatsuo Nishimura

    Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B   68 ( 671 )   2036 - 2041   2002.7

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    DOI: 10.1299/kikaib.68.2036

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  • Effect of particle size on the combustion propagation rate of counter combustion in a packed bed Reviewed

    Yoshiyuki Yamada, Yuichi Nakamura, Kuniaki Gotoh, Tatsuo Nishimura

    Kagaku Kogaku Ronbunshu   28 ( 2 )   227 - 229   2002.3

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    DOI: 10.1252/kakoronbunshu.28.227

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  • Development of annular-type virtual impactor Reviewed

    K Gotoh, H Masuda

    POWDER TECHNOLOGY   118 ( 1-2 )   68 - 78   2001.8

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    DOI: 10.1016/S0032-5910(01)00296-0

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  • Traveling plumes generated within a double-diffusive interface between counter shear flows Reviewed

    T Nishimura, S Sakura, K Gotoh, AM Morega

    PHYSICS OF FLUIDS   12 ( 11 )   3078 - 3081   2000.11

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    DOI: 10.1063/1.1308511

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  • Improvement of the Classification Performance of a Roctangular Jet Virtual Impactor Reviewed

    Gotoh,K, Masuda,H

    32   221 - 232   2000.11

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    DOI: 10.1080/027868200303759

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  • Study on the sample size required for the estimation of mean particle diameter Reviewed

    Masuda,H, Gotoh,K

    10 ( 2 )   159 - 173   1999.3

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    DOI: 10.1016/S0921-8831(08)60447-1

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  • Electric charging characteristic of a mixer-type powder disperser Reviewed

    Kittipoomwong,P, Maeda,M, Gotoh,K, Masuda,H

    9 ( 4 )   317 - 330   1998.7

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  • Removal of Single Particles Adhered on a Flat Surface by Vibrating Air Jet Reviewed

    GOTOH Kuniaki, TAKAHASHI Koichi, MASUDA Hiroaki

    Earozoru Kenkyu   13 ( 2 )   133 - 141   1998.6

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    Removal of deposited single particles by use of a vibrating air jet has been studied experimentally, with particular attention to the effect of operating conditions. Two types of nozzle were newly designed and 6 sorts of metal plates were used as a vibrating plate. Twelve combinations of the nozzle and the vibrating plate have been tested to get the best combination for the generation of a high frequency vibration. Experimental results showed that the removal efficiency is almost determined by the vibration characteristics rather than air jet velocity. When the nozzle pressure is set at 2.5&times;105 Pa or 3.0&times;105 Pa, the removal efficiency tends to increase with the frequency of the vibration at the surface. In this case, longer jet duration time enhances the efficiency. Then, the number of repetition of pressure pulsation is one of the main cause of the effects of vibration. On the other hand, when the pressure is set at 3.5&times;105 Pa, the removal efficiency is affected by the shape of the vibrating wave.

    DOI: 10.11203/jar.13.133

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  • A Study on Size Segregation of Particles Using Distinct Element Analysis

    YOSHIDA Jun, GOTOH Kuniaki, MASUDA Hiroaki

    Chemical engineering   22 ( 3 )   622 - 628   1996.5

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    'Size segregation' is a typical phenomenon usually accompanied with flow of particles. It has been demonstrated experimentally and macroscopically. However, the microscopic mechanism is difficult to observe, and it is not understood sufficiently. In this study, the experiment focused on size segregation simulated using the distinct element method. A 2-dimensional simulation for the full model of the experiment indicates equivalent behavior. However, size segregation in an accumulated layer is not properly shown. Next, the simple partial model is simulated using 2-and 3-dimensional analysis. The 2-D result does not show the size segregation clearly due to the wide scattering of data, but that of 3-D shows that it is possible to simulate the segregation properly. Also, detailed observation of the movement of each particle demonstrates the validity of the mechanism of size segregation which was presented from the experiment.

    DOI: 10.1252/kakoronbunshu.22.622

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  • Dry Dispersion of Fine Particles Reviewed

    Masuda, H, Gotoh,K

    Colloids and Surfaces A. Physicochemical and Engineering Aspects   ( 109 )   29 - 37   1996.4

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    DOI: 10.1016/0927-7757(95)03471-4

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  • 高速気流による表面付着微粒子の除去機構 Reviewed

    後藤邦彰, 多賀谷実, 増田弘昭

    化学工学論文集   21   723 - 731   1995.7

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  • Size Segregation of Polydispersed Particles Caused by Virtical Tapping. Reviewed

    YUBUTA Kazuhiro, GOTOH Kuniaki, MASUDA Hiroaki

    Journal of the Research Association of Powder Technology, Japan   32 ( 2 )   89 - 96   1995.2

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    The size segregation of polydispersed particles stored in a container was studied experimentally by tapping varying the number of taps and the falling height of the container. Tested particles ranged from 150-600μm in size.<br>It was found that the smaller particles were concentrated at the vicinity of the container bottom, while larger particles were concentrated at the upper-side. The mass median diameter (MMD) of the particles concentrated along the container bottom became smaller as the number of tapping increased and converged to a certain value. The deviation of this value from the MMD of the feed-particles was almost proportional to the square root of the falling height. This fact showed that the deviation in MMD was related to the impact force of particles which was induced by the tapping.<br>Visualization of particle movement was also carried out by the use of colored particles. It was found that the particle recirculation was induced in the container by the tapping; i. e. at the center of the container, particles were rising from the bottom to the surface of the particle-layer, while particles were dropping in the vicinity of the periphery where smaller particles moved down faster than larger particles. On the other hand, larger particles moved faster than smaller particles from the periphery to the center. Thus, it was confirmed that such differences in the movement between larger and smaller particles caused the vertical size segregation of the particles in the container.

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  • 衝突、圧縮、粉砕に伴う三酸化二アンチモン粒子の性状変化 Reviewed

    福井国博, 松崎智昭, 後藤邦彰, 増田弘昭

    粉体工学会誌   32   23 - 30   1995.1

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  • The size segregation of polydispersed particles during feeding into a vessel Reviewed

    GOTOH K.

    Journal of the Society of Powder Technology,Japan   31 ( 12 )   842 - 849   1994.12

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  • 表面付着微粒子の高効率除去法に関する検討 Reviewed

    後藤邦彰, 苅部建太, 増田弘昭, 馬場美二

    粉体工学会誌   31   726 - 733   1994.10

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  • 高速気流による微粒子の除去効率に対する表面材質の影響 Reviewed

    後藤邦彰, 武部彰二, 増田弘昭

    化学工学論文集   20 ( 5 )   685 - 692   1994.9

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  • Effect of Particle Diameter on Removal of Surface Particles Using High Speed Air Jet. Reviewed

    Gotoh Kuniaki, Kida Minoru, Masuda Hiroaki

    Chemical engineering   20 ( 5 )   693 - 700   1994.9

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    Removal of particles adhering to a surface was studied, using a high-speed air jet with particular attention to the effect of particle diameter. The experiment was conducted for latex particles of 110 μm diameter adhering to a surface of glass (flat surface), metal or plastics under various pressures in the air jet nozzle.<BR>The experimental results obtained with the flat glass surface revealed that the dynamic pressure for attaining 50% removal (Pd50) of particles was inversely proportional to the 2nd power of particle diameter. Variation of the dynamic pressure Pd50by the surface materials was well correlated with the surface characteristics (Hamaker's constant and elastic property) and relative surface roughness defined by the ratio of particle diameter and the curvature of surface protrusion. The removal force of the air jet was found to be proportional to the 2nd power of the dynamic pressure and to the 6th power of the particle diameter.

    DOI: 10.1252/kakoronbunshu.20.693

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  • Improvement of the Mixer-type Disperser Reviewed

    K GOTOH, T YOSHIDA, H MASUDA

    ADVANCED POWDER TECHNOLOGY   5 ( 4 )   323 - 337   1994.8

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    DOI: 10.1016/S0921-8831(08)60750-5

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  • Effect of the Impeller Shape on the Performance of the Mixer-type Disperser Reviewed

    K.Gotoh, H.Asaoka, H.Masuda

    Advanced Powder Technology   5   353 - 364   1994.8

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  • 高速気流による表面付着微粒子の除去効率に及ぼす湿度の影響 Reviewed

    後藤邦彰, 武部彰二, 増田弘昭

    化学工学論文集   20   205 - 212   1994.3

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  • 種々の粉体における接触電位差の測定と評価 Reviewed

    増田弘昭, 板倉隆行, 後藤邦彰, 高橋徹, 手嶋孝

    粉体工学会誌   30 ( 12 )   854 - 859   1993.12

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  • エアロゾル粒子の帯電量分布測定 Reviewed

    増田弘昭, 後藤邦彰, 折田伸昭

    エアロゾル研究   8   325 - 332   1993.12

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  • 乾式分散機の性能評価 Reviewed

    増田弘昭, 後藤邦彰

    粉体工学会誌   30 ( 10 )   703 - 708   1993.10

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  • 高速気流による壁面付着微粒子の除去 Reviewed

    増田弘昭, 後藤邦彰, 深田公司, 馬場美二

    粉体工学会誌   30 ( 1 )   24 - 31   1993.1

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  • 高速回転翼型分散機の分散機構に関する検討 Reviewed

    後藤邦彰, 高橋通泰, 増田弘昭

    粉体工学会誌   29 ( 1 )   11 - 17   1992.1

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  • 気中撹拌型微粒子分散機の分散性能に対する粉体供給流量およびインペラー回転数の影響 Reviewed

    増田弘昭, 川口哲司, 後藤邦彰

    粉体工学会誌   27 ( 8 )   515 - 519   1990.8

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  • Effect of Acceleration Distance on the Classification Performance of Improved Rectangular Jet Virtual Impactor Reviewed

    GOTOH Kuniaki, MIYAWAKI Sachiko, MASUDA Hiroaki

    Earozoru Kenkyu   3 ( 3 )   212 - 220   1988.8

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    The classification performance of an improved rectangular jet virtual impactor having clean air entrances has been studied with particular attention to the effect of acceleration distance. Experimental results showed when the acceleration distance was shorter than a certain value, the classification performance became extremely worse. Flow visualization revealed this performance deterioration was attributed to the distortion in the flow field. Experimental results obtained under no flow distortion showed that longer acceleration distance caused a lower classification performance in the low inertia region because of particle diffusion, whereas shorter distance gave a lower performance in the high inertia region. However, it was found that the deterioration in the classification performance could be avoided if the partition plate for the wall side clean air entrance was set at shorter distance from the jet and that for the slit side clean air entrance was set at relatively longer distance.

    DOI: 10.11203/jar.3.212

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Books

  • 日測協認定オキュペイショナルハイジニスト養成講座コース8 工学的対策の基礎(作業環境、一般環境)

    後藤 邦彰( Role: Contributor ,  第2章流体工学の基礎、第3章 物質の移動現象、第4章 粉体工学の基礎)

    公益財団法人日本作業環境測定協会  2023.12  ( ISBN:9784903989921

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  • 粉体の上手な取り扱い方とトラブルシューティング

    後藤邦彰( Role: Sole author ,  第9章 粉体プロセスのトラブル 第2節 粉体の付着・凝集メカニズムとその評価、トラブル回避の考え方)

    R&D支援センター  2019.10 

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  • Powder Technology Handbook, Fourth Edition

    ( Role: Sole author ,  Chapter 2.7.1 Adhesive Force of Single Particle in Gasious state, Chapter 3.11 Segregation of Particles, Chapter 5.2.1 Dispersion of Particles in Gaseous state)

    CRC Press  2019.10 

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  • 粉体の表面処理・複合化技術集大成-基礎から応用まで-

    後藤邦彰( Role: Sole author ,  第5節第1項気中分散技術)

    テクノシステム  2018.7 

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  • Developments in Surface Contamination and Cleaning Fundamentals and Applied Aspects. 2nd edition

    ( Role: Sole author ,  Vpl.1, 15 Cleaning Using High-Speed Impinging Jet)

    2016.1 

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  • 粉粒体/多孔体材料の計測とデータの解釈/使い方

    後藤邦彰( Role: Sole author ,  [3]粉体ハンドリングに必要な測定・評価方法)

    S&T出版  2015.6 

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  • Particle Adhesion and Removal

    ( Role: Sole author ,  7.High Speed Air Jet Removal of Particles from Solid Surfaces)

    2015.1 

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  • 粉体・ナノ粒子の創成と製造・処理技術=基礎物性からプロセス設計の実務・トラブル処理まで=

    後藤邦彰( Role: Sole author ,  第1章 粉体・ナノ粒子の機能性とその利用 第1節 粉体であることの優位性とその応用)

    テクノシステム  2014.11 

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  • 粉体工学ハンドブック

    後藤邦彰( Role: Sole author ,  2.21偏析、3.6.1気中分散)

    朝倉書店  2014.2 

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  • 粉・粒体の構造制御、表面処理とプロセス設計

    後藤邦彰( Role: Sole author ,  第4章 微粒子、粉体表面の分析、構造解析 第10節 粉体の流動性評価)

    技術情報協会  2013.9 

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  • ものづくり高品位化のための微粒子技術

    後藤邦彰( Role: Sole author ,  第5章微粒子をハンドリングする)

    大河出版  2012.12 

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  • 初歩から学ぶ粉体技術

    後藤邦彰( Role: Sole author ,  第7章分散 7-1.気中における粒子分散)

    森北出版  2011.12 

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  • 超微粒子の分散技術とその評価

    後藤邦彰( Role: Sole author ,  第3章 気中における粒子の付着・帯電メカニズムと分散技術 第1節気中における粒子の付着メカニズム、第3節気中における微粒子分散技術)

    サイエンス&テクノロジー  2009.2 

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  • Nanoparticle Technology Handbook ed. M.Hosokawa, K.Nogi, M.Naito and T.Yokoyama

    Kuniaki Gotoh( Role: Sole author ,  3.2.1 Single particle motion)

    2007.11 

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  • Developments in Surface Contamination and Cleanning Fundamentals and Applied Aspects Ed. R.Kohli and K.L.Mittal

    Kuniaki Gotoh( Role: Sole author ,  17 Cleaning using a High-speed Air Jet)

    2007.11 

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  • Particles on Surfaces 9

    Removal of micrometer-size particles from solid, surfaces by an impinging air jet( Role: Sole author)

    2006.8 

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  • ナノパーティクルテクノロジーハンドブック

    後藤邦彰( Role: Sole author ,  3.2.1単一粒子の運動)

    日刊工業新聞社  2006.4 

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  • 粉体工学叢書 第3巻 気相中の粒子分散・分級・分離操作

    大谷吉生, 後藤邦彰, 山田昌治, 吉田英人( Role: Joint author ,  P.12-P.34, P.73-P.91)

    日刊工業新聞社  2006.3 

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  • Powder Technology Handbook 3rd ed

    K.Gotoh( Role: Sole author ,  2.6 Adhesive Force of Single Particle, 4.5.1 Particle Dispersion in Gaseous State, 5.2.1 Basis of Classification, 5.20.1 Fluidized Beds)

    CRC Press  2006.1 

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  • エアロゾル用語集

    後藤邦彰( Role: Sole author ,  4.動力学「気体と微粒子の相互作用」「慣性運動・沈降」,14.プロセシング「分級・空気分級」「気中分散」)

    京都大学学術出版会  2004.8 

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  • 微粒子工学体系 第I巻基本技術

    後藤邦彰( Role: Sole author ,  第2章 7-2流れ場における 粒子運動 第3章 4-2気中における分散 第7章 1-2気中分散)

    フジテクノシステムズ  2001.10 

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  • 粉体工学用語辞典 第2版

    ( Role: Sole author)

    日刊工業新聞社  2000.3 

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  • 粉体工学便覧

    後藤邦彰, 遠藤偵行( Role: Joint author ,  IV章 粉粒体を扱う単位操作,3.分散,3.1気中分散)

    日刊工業新聞社  1998.3 

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  • Powder Technology Handbook 2nd ed

    H.Masuda, Kuniaki Gotoh( Role: Joint author ,  Adhesive Force of Single Particle)

    1997.8 

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MISC

  • 現場で使える粉体入門講座 第14回気中における分散 Invited

    後藤邦彰, 池田純子

    粉体技術   16 ( 5 )   411 - 416   2024.5

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  • 高速気流噴射による表面付着粒子の除去 Invited

    後藤 邦彰

    砥粒加工学会誌   67 ( 7 )   381 - 384   2023.7

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  • Integration of powdery thermal energy storage materials for the development of a novel thermal energy storage body

    妹尾健斗, 中曽浩一, 三野泰志, 後藤邦彰, 谷屋啓太, 日出間るり, 鈴木洋

    日本伝熱シンポジウム講演論文集(CD-ROM)   60th   2023

  • 気流による分離・除去に基づく単一粒子-固体壁面間の付着に関する一考察 Invited

    後藤 邦彰

    Pharm Tech Japan   38 ( 12 )   179 - 184   2022.9

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  • Measurement of Apparent Powder Viscosity by Tuning-fork Vibration Viscometer Reviewed

    後藤邦彰, 余越康隆, 中曽浩一, 三野泰志, 石塚英樹, 西塚昌弘

    粉体工学会誌   58 ( 5 )   250 - 254   2021.5

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    J-GLOBAL

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  • 第6章粒子集合体の力学的特性測定法の基礎と実際-粒子集合体の力学的特性測定法の概論- Invited

    後藤邦彰

    化学装置   44 - 51   2020.6

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  • 新・粉体工学基礎講座 第1章粒子の性質と測定 1.11粒子の凝集・分散・分散安定化 1.11.1 粒子の凝集・分散・分散安定化の概要,1.11.2 粒子の凝集, 1.11.3 凝集粒子の分離・分散

    後藤邦彰, 飯島志行

    粉体工学会誌   57 ( 6 )   332 - 337   2020.6

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  • 粉体技術者のための粉体入門講座 入門の予習編 第2章-1~12 Invited

    後藤邦彰

    粉体技術   10 ( 3 )   2018.3

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  • Powder characteristics for index of powder unit operation

    Journal of the Taiwan Institute of Chemical Engineers   90   1 - 5   2018

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  • Consideration on a Powder Characteristic for Index of Powder Unit Operation Performance

    53 ( 6 )   396 - 401   2016.6

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  • 粒子分散技術と粉体の付着性に関する一考察 Invited

    後藤邦彰

    粉砕   58   51 - 59   2016.1

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  • 一軸圧縮成形体・充填に対する一考察-単成分での粒子径の影響と微粒子添加による充填率向上- Invited

    後藤邦彰, 吉田幹生

    Pharm Tech Japan   31 ( 16 )   103 - 110   2015.12

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  • The influence of starting materials on the color tone of cobalt blue pigment

    53   45 - 48   2015.9

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  • 高速エアジェットによる固体表面からの粒子除去 Invited

    後藤邦彰

    エアロゾル研究   29 ( 4 )   229 - 235   2014.12

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  • Characteristics for Powder Handling : Adhesion, Resuspension and Dustiness Invited

    78 ( 3 )   171 - 174   2014.3

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  • 粉体技術者のための粉体入門講座 入門の予習編-1~12,第2章-1~12 Invited

    後藤邦彰

    粉体技術   2014.1

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  • Dustiness testing of manufactured nanomaterials

    Isamu Ogura, Atsuo Kishimoto, Hiromu Sakurai, Masashi Gamo, Mari Kotake, Kuniaki Gotoh

    29TH SYMPOSIUM ON AEROSOL SCIENCE AND TECHNOLOGY, 2012   231 - 232   2012

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  • エアジェットによる固体表面からの微粒子除去 Invited

    後藤邦彰

    空気清浄   47 ( 5 )   23 - 30   2010.1

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  • Fundamentals on Aerosol Nanoparticle Dispersion, Deposition and Agglomeration and their Evaluation

    OKUYAMA Kikuo, ISKANDAR Ferry, GOTOH Kuniaki

    Journal of the Society of Powder Technology,Japan   47 ( 10 )   722 - 738   2010

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  • 粉体付着特性測定とその単位操作への適用 Invited

    後藤 邦彰

    M&E   163 - 165   2008

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  • 粒子の付着力と付着性-付着力と分離力のバランスから考える粉体粒子の付着現象- Invited

    後藤邦彰

    クリーンテクノロジー   ( 6 )   46 - 50   2008

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  • Control of Apparent Specific Gravity in Binary Particle Systems of Gas-Solid Fluidized Bed Invited

    Mikio Yoshida, Jun Oshitani, Keiko Ono, Miki Ishizashi, Kuniaki Gotoh

    KONA POWDER AND PARTICLE JOURNAL   26   227 - 237   2008

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    DOI: 10.14356/kona.2008020

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  • 粉体の付着力と付着性 Invited

    後藤邦彰

    日刊工業新聞   2007.10

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  • Application of Penetration Method to Evaluation of Non-uniformity of Particle Bed Structure Invited

    Kuniaki Gotoh, Tatsuo Daikoku, Tatsuo Nishimura

    KONA-POWDER AND PARTICLE   25 ( 25 )   280 - 288   2007

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

    DOI: 10.14356/kona.2007026

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  • Fluidized Bed Medium Separation (FBMS) of Mortar and Gravel for Recycle of Waste Concrete

    YOSHIDA Mikio, OSHITANI Jun, OKUDA Kazuyuki, OHISHI Hiroyuki, GOTOH Kuniaki

    Journal of the Society of Powder Technology,Japan   43 ( 4 )   260 - 269   2006.4

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  • Measurement of Resuspension Fraction of Deposited Particles Using A Piezoelectric Sensor Reviewed

    GOTOH Kuniaki, HOLLANDER Werner

    14   192 - 194   1997.8

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  • 表面付着微粒子の高効率除去法-高速気流(エアー・ジェット)噴射法の基礎とその応用- Invited

    後藤邦彰, 増田弘昭

    クリーンテクノロジー   46 - 49   1996.1

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  • バーチャル・インパクターによる高精度分級の可能性 Invited

    後藤邦彰, 増田弘昭

    粉体と工業   24 ( 5 )   42 - 51   1992.5

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Presentations

  • DEM Simulations of Cohesive Particle Behavior in a Shear Field

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    Event date: 2021.10.11 - 2021.10.14

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  • Lattice Boltzmann Model for Evaporation of Colloidal Suspensions

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    Event date: 2021.10.11 - 2021.10.14

    Language:English   Presentation type:Oral presentation (general)  

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  • Lattice Boltzmann Model for Capillary Forces between Cylindrical Particles at Gas-Liquid Interface

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    Event date: 2021.10.11 - 2021.10.14

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  • Evaluation of drying process of a droplet considering flow and temperature fields in a spray dryer

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    Event date: 2019.9.23 - 2019.9.27

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  • Evaluation of particle-wall adhesion characteristics based on separation of adhered particle by high speed air jet

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    Event date: 2019.9.23 - 2019.9.27

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  • Evaluation of Local Powder Flowability Induced by Gravity

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    Event date: 2017.7.30 - 2017.8.3

    Language:English   Presentation type:Oral presentation (general)  

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  • Fundamentals of Particle Removal by High Speed Air Jet and Enhancement Methods of the Removal Performance Invited International conference

    Kuniaki Gotoh

    2016 Material Research Society Spring Meeting & Exhibits  2016  Material Reseacrh Society

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    Event date: 2016.3.28 - 2016.4.1

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Phoenix, Arizona, USA  

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  • Influence of Raw Materials on Color Tone of Cobalt Blue Pigment

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    Event date: 2015.9.15 - 2015.9.18

    Language:English   Presentation type:Oral presentation (general)  

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  • DEM Simulation Analysis for Effects of Adhesive Forces of Admixed Particles on Compressed Packing Fractions in a Particle Bed

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    Event date: 2015.9.15 - 2015.9.18

    Language:English   Presentation type:Oral presentation (general)  

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  • A fundamental investigation for evaluation of a filler distribution in a composite material using ultrasonic properties

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    Event date: 2015.7.7 - 2015.7.10

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  • Characteristics and Mechanism of Particle Release During Opening of a Vessel Containing Nanomaterials International conference

    Moyuru Okano, Mikio Yoshida, Jun Oshitani, Kuniaki Gotoh, Isamu Ogura

    9th Asian Aerosol Conference  2015 

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    Event date: 2015.6.24 - 2015.6.27

    Language:English   Presentation type:Poster presentation  

    Venue:Kanazawa, Japan  

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  • Release characteristics of single-wall carbon nanotubes during manufacturing and handling

    I. Ogura, M. Kotake, N. Hashimoto, K. Gotoh, A. Kishimoto

    NANOSAFE 2012: INTERNATIONAL CONFERENCES ON SAFE PRODUCTION AND USE OF NANOMATERIALS  2013  IOP PUBLISHING LTD

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    Event date: 2013

    Language:English  

    We investigated the release characteristics of single-wall carbon nanotubes (CNTs) synthesized by a pilot-scale plant. In addition to on-site aerosol measurements at the pilot-scale plant where the CNTs were synthesized, harvested, and packed, we conducted dustiness tests by vortex shaking and by transferring CNTs from one bowl to another. In the results of the on-site aerosol measurements, slight increases in the concentration were observed by aerosol monitoring instruments in the enclosure where CNTs were harvested and packed. In filter samples collected in this enclosure, micron-sized CNT clusters were observed by electron microscopy analysis. For samples collected outside the enclosure or during other processes, no CNTs were observed. The concentrations of elemental carbon at all locations were lower than the proposed occupational exposure limits of CNTs. The results of the dustiness tests revealed that submicron-sized particles were dominant in the number concentration measured by aerosol monitoring instruments, whereas micron-sized CNT clusters were mainly observed by electron microscopy analysis. The results of dustiness tests indicate that these CNTs have a low release characteristic. The lower drop impact of CNT clusters due to their lower bulk density resulted in lower CNT release from falling CNTs.

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  • Effect of Diameter and Coverage Ratio of Admixed Particle on Packing Fraction in Particle-Bed

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    Event date: 2012.7.2 - 2012.7.5

    Language:English   Presentation type:Oral presentation (general)  

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  • Effect of Particle Size on Packing Fraction Obtained by Dry Compaction of Powders Having Sizes in the Range from Micron to Nano-meter

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    Event date: 2010.4

    Language:English   Presentation type:Oral presentation (general)  

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  • Evaluattion of Adhesion Characteristics under High Temperature Condition by Air Penetration Method

    Kuniaki GOTOH, Hideori Shinohara, Mikio Yoshida, Jun Oshitani

    The Third Asian Particle Technology Symposium  2007 

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    Event date: 2007.9.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Beijing, China  

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  • Development of industrial scale high performance separation system for removal of Cl-containing plastics from waste plastics by using gas-solid fluidized bed

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    Event date: 2007.9

    Language:English   Presentation type:Oral presentation (general)  

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  • Evaluation of Particle Adhesion Characteristics Based on Fluid Penetration Method

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    Event date: 2005.11

    Language:English   Presentation type:Oral presentation (general)  

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  • Fluidized Bed Medium Separation (FBMS) of Shredder Residue of Electric Appliance Waste

    Oshitani, J, Kaname, K, Gotoh, K

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    Event date: 2004.10

    Language:English   Presentation type:Oral presentation (general)  

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  • Change of Pressure Drop of Particle Suspension Flow by a Flocculant

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    Event date: 2004.10

    Language:English   Presentation type:Oral presentation (general)  

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  • Reduction of Pressure Drop of Solid-liquid Multiphase Flow by a Flocculant

    *Kuniaki GOTOH, Shinichi MORIYAMA, Tatsuo Nishimura

    The 2nd Asian Particle Technology Symposium, 2003  2003 

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    Event date: 2003.12.17 - 2003.12.19

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Peneng, Malaysia  

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  • Effect of neighbor particle on resuspension fraction from sparse particle bed

    2002 

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    Event date: 2002.9

    Language:English   Presentation type:Oral presentation (general)  

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  • Effect of Number Density of Deposited Particles on Resuspension Fraction from Sparse Particle Bed

    2001 

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    Event date: 2001.9

    Language:English   Presentation type:Oral presentation (general)  

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  • The Effect of Particle Size on the Reverse Combustion in a Packed Bed

    2001 

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    Event date: 2001.6.24 - 2001.6.27

    Language:English   Presentation type:Oral presentation (general)  

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  • Particle Separation in Suspension of Neutrally Buoyant Particles and Liquid by Thermal Convection

    Nishimura,T., Jyono,M.,*Gotoh,K. and Kunitsugu,K.

    JSME/KSME Thermal Engineering Conf.  2000 

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    Event date: 2000.10.1 - 2000.10.6

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Kobe, Japan  

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  • Effect of Nozzle Shape and Operating Conditions on Resuspension of Single Particles by an Impinging Air Jet

    Gotoh,K. Aoe,K, Nishimura,T

    J.Aerosol Sci.p.p.S837-S838  2000 

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    Event date: 2000.9.8 - 2000.9.13

    Language:English   Presentation type:Oral presentation (general)  

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  • Velocity Measurements of Double-Diffusive Convection During Unidirectional Binary Solidification

    Tatsuo NISHIMURA, Makoto SASAKI, Kuniaki GOTOH

    2nd Pacific Symposium on Flow Visualization and Image Processing  1999 

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    Event date: 1999.5.16 - 1999.5.19

    Language:English   Presentation type:Oral presentation (general)  

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  • Enhancement of Removal Efficiency of Deposited Single Particles by a High Speed Air Jet

    Gotoh,K, Masuda,H

    J.Aerosol Sci., vol.29, Suppl.1, p.p.S1231-S1232 

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    Event date: 1998.9

    Language:English   Presentation type:Oral presentation (general)  

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  • The Structure of The Diffusive Interface in a Salt-stratified Two-layer System Under a Horizontal Temperature Gradient

    Nishimura,T, Sakura,S, Sejima,T, Gotoh,K

    8th International Symposium on Flow Visualization 

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    Event date: 1998.9

    Language:English   Presentation type:Oral presentation (general)  

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  • Mass Transfer Between Double-diffusive Layers Under a Horizontal Temperature Gradient

    Nishimura,T, Sakura,S, Ogata,Y, Gotoh,K

    11th International Heat Transfer Conf., Kyongju 

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    Event date: 1998.8

    Language:English   Presentation type:Oral presentation (general)  

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  • Experimental study of Resuspension of Deposited Single Particles Using a Piezoelectric Sensor

    Gotoh,K, Hollaender,W

    J. Aerosol Sci. vol.28, Suppl.1,p.p.S497-S498 

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    Event date: 1997.9

    Language:English   Presentation type:Oral presentation (general)  

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  • Morphological Change of hardened Oil Particles Induced by Impaction Against a Wall

    Fukui,K, Masuda,H, Gotoh,K, Suzuki,M

    14th annual meeting of AAAR 

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    Event date: 1995.9

    Language:English   Presentation type:Oral presentation (general)  

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  • New Removal Methods of Deposited Particles from a Solid Surface

    Gotoh,K, Masuda,H

    14th annual meeting of AAAR 

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    Event date: 1995.9

    Language:English   Presentation type:Oral presentation (general)  

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  • Removal of Particles Deposited on the Surface Using high-speed Air Jet

    Masuda,H, Gotoh,K

    4th International Aerosol Conf. 

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    Event date: 1994.8

    Language:English   Presentation type:Oral presentation (general)  

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  • Fine Particle Size Classification by a Virtual Impactor

    Gotoh,K, H.Masuda

    Third International Aerosol Conf.,Kyoto 

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    Event date: 1990.9

    Language:English   Presentation type:Oral presentation (general)  

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Awards

  • 優秀論文賞

    2015.3   化学工学会   難流動性粒子の流動性評価に向けた新規装置の開発

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  • 粉体工学情報センター学術奨励賞

    2006  

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    Country:Japan

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  • 粉体工学会奨励賞

    1996  

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    Country:Japan

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  • 化学工学会奨励賞

    1995  

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    Country:Japan

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  • エアロゾル研究協議会論文賞

    1991  

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    Country:Japan

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Research Projects

  • Study on Local Powdwer Characteristics for an Index of Packing and Compression in Powder Compression Molding Process

    Grant number:18K04813  2018.04 - 2021.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Gotoh Kuniaki

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    Grant amount:\4420000 ( Direct expense: \3400000 、 Indirect expense:\1020000 )

    The compression molding of powder has been used in various manufacturing processes such as tableting of medicine and powder metallurgy, and many studies have been reported. In such powder handling process, it is said that the powder behavior on the mesoscopic scale dominates the macro behavior, but the powder characteristics on the mesoscopic scale, that reflects local powder characteristics, have not defined. In this study, the evaluation method for local powder characteristics and characteristic indexes were proposed although the indexes can be applied to only on a gravity flow during a compression molding operation. Regarding the pressure propagation in the compression molding, the local propagation pressure was measured. It was found that the pressure propagation in the mold was anisotropic within the particle elastic deformation region, and the pressure propagation ratio in the compression direction and the side wall direction was a particle characteristic.

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  • Equivalent diameter and shape factor of non-spherical particles based on an evaluation of flowability

    Grant number:15K06542  2015.04 - 2018.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    GOTOH Kuniaki

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    Grant amount:\4810000 ( Direct expense: \3700000 、 Indirect expense:\1110000 )

    For the purpose of establishing the quantitative evaluation of so-called "flowability", the local flowability evaluation method and the particle-solid adhesiveness evaluation method were investigated.
    Regarding the evaluation of local fluidity, I tried applying a tuning fork viscometer and clarified that the apparent flow resistance of inorganic particles and organic particles of nano order to several tens of microns can be measured by improving the apparatus.
    As for the particle-solid adhesiveness, by defining the ratio of the square of the Hamaker constant and the separation distance as a relative adhesion index newly, it is possible to estimate adhesion force between particle and solid wall based on the comparison of removal efficiencies between the reference particle-wall combination and target combination of particle and wall.

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  • Drag reduction of Solid-liquid Suspension Using Macro-agglomeration Structure induced by Shear flow

    Grant number:15560146  2003 - 2004

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    GOTOH Kuniaki

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    Grant amount:\3700000 ( Direct expense: \3700000 )

    It is known that a surfactant solution with appropriate counter ion induces the structure of fiber-like micelles in a shear flow field. When the structure is induced, the drag of the pipe flow is reduced. Based on the fact, we presumed that structure of agglomerated particles in a particle suspension also causes the same effect. Thus, we attempted to reduce the pressure drop of the suspension flow by adding a polymer flocculant. In this study, we investigated the change of the pressure drop of the pipe flow with the flocculant concentration. The change of the drag was evaluated by the drag reduction rate defined by the ratio of the difference of the friction factor between water flow and suspension flow to the friction factor of water flow.
    It was found that the suspension with polymer flocculant caused the drag reduction under the conditions of particle concentration 1 and 10vol%. In the same flocculant concentration, the water solution of the flocculant (=without particles) also caused the drag reduction. However, the drag reduction rate of the solution was less than that of the suspension with flocculant under certain conditions. The fact shows that the particle enhances the drag reduction.
    The effect of the flocculant on the drag reduction decreases with time. One of the main causes is the cut of polymer chain by a shear flow field and/or by the equipment like a pump. It was found that the adding a flocculant into a particle suspension causes larger enhancement than the adding particles into the flocculant solution. It leads to an assumption that inhomogeneous agglomeration attributes to the enhancement. Thus, it was expected that the change of agglomeration from inhomogeneous to homogeneous is another cause of the decrease of the effect.
    From the observation of the flocculate in a stationary fluid, it was found that independent agglomerations were formed when the drag reduction was enhanced. The fact shows that the drag reduction is attributed by agglomerated particles. It leads to an expectation that the drag reduction can be achieved in any other solid-liquid suspension if proper agglomeration is formed.

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  • 電気粘性効果を利用した粒子配向構造制御による固液混相流中での熱移動制御

    Grant number:12750165  2000 - 2001

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    後藤 邦彰

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    Grant amount:\2100000 ( Direct expense: \2100000 )

    本研究では、絶縁性流体中に浮遊させた固液混相流体に外部から電界を印加すると、電界の方向に配向した数珠状粒子凝集構造が形成し、混相流体の見かけ粘度が増加する電気粘性効果を凝集体構造制御法として利用し、固液混相流から熱移動を行う系において粒子凝集構造を制御することにより熱流束制御を行う技術の開発を目指した。
    昨年度検討した流路内での電界形成法の結果に従い製作した2種類の流路、すなわち、二次元流路の上下壁を電極として直流電界を印加できる流路、および、平行平板電極を流れ方向に2組上下壁に設置し、上流側の上下壁を正極、下流側を負極として直流電界を印加できる装置で、運動量輸送に及ぼす凝集体配向構造の影響を検討した。その結果、安定したER効果が得られるのは、層流域のRe数が比較的低い領域であり、その領域内では直交配向した凝集体形成による圧力損失増加量は平行配向した凝集体形成時の約3倍となることがわかった。また、その理由を、配向による流体抵抗力の違いと、粒子間付着力と流体抵抗力の力の釣合から求められる凝集体切断点数の違いを考慮したモデルにより説明できた。なお、この関係が成立する限界のRe数は粒子濃度により変化し、高濃度ほど限界のRe数は低くなることも明らかにした。
    また、限界Re数を超えるとER効果は減少し、Re数2000前後で直交配向した凝集体でも平行配向した凝集体でもER効果は消失する。Re数をさらに増加させると、電界を印加した時の方が無電界時よりも圧力損失が低下するという、抵抗低減現象が起こることが見つかった。このような現象が凝集構造を電界で制御した固液混相流で起こるということは今のところ報告されていない。なお、この抵抗低減は、運動量輸送とアナロジーが成立する熱移動を、粒子凝集体により抑制できることを示唆する。

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  • 乱流特性との相関に基づく粒子状汚染物質の衝突噴流による分離・飛散過程のモデル化

    Grant number:10750129  1998 - 1999

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    後藤 邦彰

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    Grant amount:\2200000 ( Direct expense: \2200000 )

    衝突噴流による粒子状汚染物質の分離・飛散現象の理解と飛散率の定量的な予測を目的とし、衝突噴流による粒子飛散実験を行った。本年度の実験では、昨年度構築した飛散率測定システムを用い、約120msec以内で終了する初期飛散過程での飛散率(初期飛散率)と、それ以降10秒程度まで持続する二次飛散過程での飛散率(二次飛散率)での飛散率それぞれを、噴流操作条件とノズル形状を変えて測定した。また、壁面気流圧力を実測し、初期飛散率および二次飛散率と気流動圧との相関を検討した。その結果、以下の知見が得られた。
    1.粒子径の異なる4種類の粒子(3,5,7,10μm)のどの場合にも、ノズル内圧力の増加およびノズル-粒子付着表面間距離の減少に伴い、初期飛散率は増加する。また、ノズル内流路面積が出口部において急激に減少する形状のノズル(ノズルA)に比べ、流路面積が徐々に減少するノズル(ノズルB)の方が粒子の飛散効果は高い。
    2.1.の気流操作条件およびノズル形状による初期飛散率の違いは、壁面気流圧力の実測値、すなわち、気流の動圧の実測値の違いにより説明することができた。すなわち、昨年度の仮説が立証され、初期飛散率については、気流動圧により予測可能であることがわかった。
    3.二次飛散率を、初期飛散終了後に残存する粒子数に対する二次飛散過程で飛散した粒子の比で定義すると、初期飛散率と同様、壁面気流圧力の増加に伴い増加する傾向がある。しかし、壁面気流圧力と飛散率の相関は、初期飛散率の場合よりも低く、二次飛散過程は時間平均的な気流特性を反映する壁面気流圧力だけでは説明できない。

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  • 音波による表面付着微粒子の分離促進機構

    Grant number:07750831  1995

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    後藤 邦彰

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    Grant amount:\900000 ( Direct expense: \900000 )

    半導体産業等の多くの分野で問題となっている粒子状物質の除去操作に対して高速気流による除去法の検討を行ってきた結果、強制的に特定周波数の変動を高速気流に与えることにより、分離が促進されることがわかった。そこで、この気流変動による分離促進機構の解明を目的として、実験的検討を行った。本研究では、振動ノズルを新たに設計・試作した。このノズルには振動板があり、この振動板材質および板厚さを変えることにより振動特性を変えることができる。実験では、振動特性が粒子分離力に与える影響に着目し、平滑表面(ほう珪酸ガラス)上に単分散球形粒子を付着させ、種々の振動特性を持つ高速振動気流を吹き付ける除去操作を行い、気流噴射前後での粒子数差から、振動特性による除去効率の変化を求めた。
    実験結果から、振動気流から粒子に働く分離力は、気流速度に影響するノズルでの空気圧力よりも気流振動特性に主に依存することがわかった。本実験範囲での低圧空気を用いると、単位時間当たり分離できる粒子数は振動周波数の増加とともに増加する。この時には、気流噴射時間の増加とともに分離された単調に増加する。このことから、低圧時の粒子の分離力は圧力変動回数に依存すると考えられる。一方、ノズル内圧力が高いときには、分離力の周波数依存性は見られなくなり、振動波形によって分離力は異なり、最適な振動波形が存在することがわかった。この時には、気流噴射時間を長くすると分離される粒子数は最大値に達する。

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  • Chemical Process Engineering (2021academic year) Fourth semester  - 火5,火6

  • Basic Chemistry (2021academic year) Second semester  - 火3,火4,金1,金2

  • Basic Chemistry (2021academic year) Second semester  - 火3~4,金1~2

  • Basic Chemistry (2021academic year) Second semester  - 火3,火4,金1,金2

  • Chemical Equipment Design and Drawing (2021academic year) 1st and 2nd semester  - 金5,金6,金7,金8

  • Chemical Equipment Design and Drawing 1 (2021academic year) 1st semester  - 金5,金6,金7,金8

  • Chemical Equipment Design and Drawing 2 (2021academic year) Second semester  - 金5,金6,金7,金8

  • Internship in Applied Chemistry (2021academic year) Prophase  - その他

  • Seminar on Applied Chemistry 1 (2021academic year) Prophase  - その他

  • Seminar on Applied Chemistry 2 (2021academic year) Late  - その他

  • Research Works for Master Thesis on Applied Chemistry (2021academic year) Year-round  - その他

  • Topics in Material Process 2 (2021academic year) Summer concentration  - その他

  • Physical Chemistry and Exercises 2 (2021academic year) Third semester  - 月3,月4,木3,木4

  • Physical Chemistry 2 (2021academic year) Third semester  - 月3,月4,木3,木4

  • Advance in Particle Characteristics (2021academic year) Prophase  - その他

  • Seminar in Fluid and Particle Process Engineering (2021academic year) Year-round  - その他

  • Particle-Fluid Engineering (2021academic year) Prophase  - 水1,水2

  • Chemical Process Engineering (2020academic year) Fourth semester  - 火5,火6

  • Chemical Process Engineering (2020academic year) Fourth semester  - 火5,火6

  • Chemical Equipment Design and Drawing (2020academic year) 1st and 2nd semester  - 金5,金6,金7,金8

  • Chemical Equipment Design and Drawing 1 (2020academic year) 1st semester  - 金5,金6,金7,金8

  • Chemical Equipment Design and Drawing 2 (2020academic year) Second semester  - 金5,金6,金7,金8

  • Internship in Applied Chemistry (2020academic year) Prophase  - その他

  • Seminar on Applied Chemistry 1 (2020academic year) Prophase  - その他

  • Seminar on Applied Chemistry 2 (2020academic year) Late  - その他

  • Basic Applied Chemistry (2020academic year) Late  - 月3~4,火3~4

  • Research Works for Master Thesis on Applied Chemistry (2020academic year) Year-round  - その他

  • Topics in Material Process 4 (2020academic year) Summer concentration  - その他

  • Topics in Material Process 2 (2020academic year) Summer concentration  - その他

  • Advanced Materials Chemistry 8 (2020academic year) Summer concentration  - その他

  • Physical Chemistry and Exercises 2 (2020academic year) Third semester  - 月3,月4,木3,木4

  • Physical Chemistry 2 (2020academic year) Third semester  - 月3,月4,木3,木4

  • Advanced Synthetic Chemistry 8 (2020academic year) Summer concentration  - その他

  • Advance in Particle Characteristics (2020academic year) Prophase  - その他

  • Seminar in Fluid and Particle Process Engineering (2020academic year) Year-round  - その他

  • Particle-Fluid Engineering (2020academic year) Prophase  - 水1,水2

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