Updated on 2024/04/04

写真a

 
OBUSE Kiori
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Associate Professor
Position
Associate Professor
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Degree

  • 博士(理学) ( 京都大学 )

Research Interests

  • Fluid mechanics

Research Areas

  • Natural Science / Basic mathematics

  • Natural Science / Applied mathematics and statistics

Education

  • Kyoto University   大学院理学研究科   数学・数理解析専攻(数理解析研究所) 博士後期課程

    2009.4 - 2012.3

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  • Kyoto University   大学院理学研究科   数学・数理解析専攻(数理解析研究所) 修士課程

    2007.4 - 2009.3

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  • Kyoto University   理学部   理学科

    2003.4 - 2007.3

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Research History

  • Kiori Obuse   Associate Professor

    2023

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  • Okayama University   学術研究院環境生命科学学域   Associate Professor

    2021.4 - 2023.3

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  • Okayama University   The Graduate School of Environmental and Life Science   Associate Professor

    2020.4 - 2021.3

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    Country:Japan

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  • Okayama University   The Graduate School of Environmental and Life Science   Assistant Professor

    2015.4 - 2020.3

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    Country:Japan

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  • Tohoku University   原子分子材料科学高等研究機構   Assistant Professor

    2012.4 - 2015.3

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    Country:Japan

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Professional Memberships

  • THE MATHEMATICAL SOCIETY OF JAPAN

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  • THE PHYSICAL SOCIETY OF JAPAN

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  • THE JAPAN SOCIETY FOR INDUSTRIAL AND APPLIED MATHEMATICS

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  • JAPAN GEOSCIENCE UNION

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  • THE JAPAN SOCIETY OF FLUID MECHANICS

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Committee Memberships

  • 日本流体力学会   理事  

    2024.4   

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    Committee type:Academic society

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  • The Physical Society of Jalan   delegate  

    2023.4   

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    Committee type:Academic society

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  • 日本流体力学会中四国・九州支部   幹事  

    2021.4   

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  • 文部科学省 科学技術・学術政策研究所 科学技術予測センター   専門調査委員  

    2018.4 - 2020.3   

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    Committee type:Other

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  • 日本数学会   2018年度秋季総合分科会 実行委員  

    2018.4 - 2018.9   

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    Committee type:Academic society

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  • 日本流体力学会   男女共同参画委員  

    2015.12 - 2023.3   

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    Committee type:Academic society

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  • 日本物理学会   領域11運営委員  

    2014.4 - 2015.3   

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    Committee type:Academic society

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Papers

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MISC

  • 26aTC-8 The interaction between zonal jets on a beta plane

    Obuse Kiori, Takehiro Shin-ichi, Yamada Michio

    Meeting abstracts of the Physical Society of Japan   66 ( 1 )   301 - 301   2011.3

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    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

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  • 22pEJ-7 An effect of turbulence on the stability of a zonal flow on a beta plane

    Obuse Kiori, Takehiro Shin-ichi, Yamada Michio

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   338 - 338   2010.3

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    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

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  • Trajectories of a low Reynolds number treadmilling organism near a half-infinite no-slip wall

    Kiori Obuse, Jean-Luc Thiffeault

    Proceedings Volume 2010 - "Swirling and Swimming in Turbulence", Woods Hole, MA, Woods Hole Oceanographic Institute   281 - 305   2010

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  • 回転球面上の強制2次元乱流の漸近状態

    小布施祈織, 竹広真一, 山田道夫

    数理解析研究所講究録(乱流の動力学的記述と統計力学的記述の相補性)   1721   50 - 64   2010

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    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)  

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  • 28aQC-3 Forced two-dimensional turbulence on a rotating sphere

    Obuse Kiori, Takehiro Shin-ichi, Yamada Michio

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   218 - 218   2009.8

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    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

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  • Forced two-dimensional turbulence on a rotating sphere

    Obuse Kiori, Takehiro Shin-ichi, Yamada Michio

    2009   36 - 36   2009

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    Language:Japanese  

    This study investigates large time asymptotic state of the forced two-dimensional turbulence of incompressible fluid on a rotating sphere, which is one of the most basic models for planetary atmospheres. In this system, a robust multiple zonal-band structure has been known to appear in course of time development. However, further numerical integration shows that the multiple zonal-band structure experiences a series of mergers/disappearances of its zonal jets, and that the final flow field consists of only a few broad zonal jets dominating over the whole sphere.

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Presentations

  • Formation of zonal flow and Rossby wave nonlinear interactions in two-dimensional turbulence on a rotating sphere Invited

    Kiori Obuse, Yusuke Hagimori, Michio Yamada

    AAPPS-DPP2023  2023.11.16 

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    Event date: 2023.11.13 - 2023.11.17

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

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  • Zonal-flow formation and three-wave nonlinear interactions in two-dimensional turbulence on a rotating sphere Invited

    Kiori Obuse, Hagimori Yusuke, Michio Yamada

    2023.8.2 

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    Event date: 2023.8.2 - 2023.8.3

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  • Nonlinear interactions of Rossby waves in two-dimensional turbulence on a rotating sphere

    2023.7.17 

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    Event date: 2023.7.17 - 2023.7.19

    Language:English   Presentation type:Oral presentation (general)  

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  • 回転球面上2 次元乱流での大規模東西流形成におけるロスビー波相互作用 の役割

    小布施祈織, 萩森祐介, 山田道夫

    現象と数理モデル2022  2022.12.11 

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    Event date: 2022.12.9 - 2022.12.11

    Language:Japanese   Presentation type:Oral presentation (general)  

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  • 回転球面上 2 次元乱流における大規模構造形成と ロスビー波間非線形相互作用

    小布施祈織, 萩森祐介

    日本流体力学会2022年度年会  2022.9.29 

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    Event date: 2022.9.27 - 2022.9.29

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  • 回転球面上2次元乱流におけるロスビー波間非線形相互作用と東西流形成

    萩森祐介, 小布施祈織

    日本物理学会2022年秋季大会  2022.9.14 

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    Event date: 2022.9.13 - 2022.9.15

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  • 回転球面上2次元乱流における大規模構造形成とロスビー波非線形相互作用 Invited

    小布施祈織, 山田道夫

    2022年度日本統計関連学会連合大会  2022.9.6 

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    Event date: 2022.9.4 - 2022.9.8

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

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  • Towards an understanding of the mechanism of zonal flow formation in two-dimensional turbulence on a rotating system Invited

    Kiori Obuse

    Fusion Plasma Seminar  2021.11.12 

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    Event date: 2021.11.12

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

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  • Spherical and β-plane approximation models for two-dimensional turbulence on a rotating sphere Invited

    Kiori Obuse

    AAPPS-DPP2021  2021.9.29 

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    Event date: 2021.9.26 - 2021.10.1

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  • Uncertainty in bioinformatics Invited

    Kiori Obuse

    RIMS project Biofluids2021: Ecology & Evolution, Kyoto university  2021.7.6 

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    Event date: 2021.7.5 - 2021.7.7

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  • 回転球面上2 次元Rossby 波乱流における大規模東西流形成 Invited

    小布施祈織, 山田道夫

    日本流体力学会中四国九州支部講演会  2021.6.5 

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    Event date: 2021.6.5

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  • 回転球面上およびβ平面上での2次元乱流における大規模構造形成について

    原翔一郎, 小布施祈織

    日本物理学会第76回年次大会  2021.3.12 

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    Event date: 2021.3.12 - 2021.3.15

    Language:Japanese   Presentation type:Poster presentation  

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  • Inviscid limit solution of 2D Navier-Stokes equation on a rotating sphere with hyper viscosity Invited

    Kiori Obuse, Michio Yamada

    Kavli Institute for Theoretical Physics Program; Layering and Staircases  2021.1.26 

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    Event date: 2021.1.11 - 2021.3.12

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  • Large-scale structure formationin 2D turbulence on a rotating sphere Invited

    小布施祈織

    岡山大学女性教員シーズ発信会2020  2020.11.30 

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    Event date: 2020.11.30

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

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  • 回転球面上2次元乱流における大規模構造形成 Invited

    小布施祈織, 山田道夫

    工学と数学の接点を求めて  2020.11.26 

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    Event date: 2020.11.26 - 2020.11.27

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

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  • Inviscid limit solution of 2D Navier-Stokes equation on a rotating sphere with hyper viscosity

    Kiori Obuse, Michio Yamada

    The 17th International Conference on Flow Dynamics (ICFD2020)  2020.10.29 

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    Event date: 2020.10.28 - 2020.10.30

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  • 超粘性を用いた回転球面上2次元Navier-Stokes方程式の非粘性極限解

    小布施祈織, 山田道夫

    日本流体力学会2020年度年会  2020.9.19 

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    Event date: 2020.9.18 - 2020.9.20

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  • 超粘性を用いた回転球面上2次元Navier-Stokes方程式の非粘性極限解の非粘性解への収束について

    小布施祈織, 山田道夫

    日本物理学会2020年秋季大会  2020.9.8 

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    Event date: 2020.9.8 - 2020.9.11

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  • Numerical simulation of behavior of nanoparticles under the influence of flows

    Kiori Obuse, Nobuaki Aoki, Tomoki Miyatake, Tadafumi Adschiri, Yasumasa Nishiura

    RIMS International Conference: Mathematical Challenge to a New Phase of Materials Science, Kyoto University  2014.8.4 

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    Event date: 2014.8.4 - 2014.8.8

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  • Merging and disappearing processes of zonal flows in forced two-dimensional turbulence on a rotating system Invited

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    Fusion Plasma Seminar, Seoul National University  2023.10.19 

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    Language:English   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

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  • Large-scale zonal-flow formation in two-dimensional turbulence on a rotating sphere Invited

    Kiori Obuse, Yusuke Hagimori, Michio Yamada

    Fusion Plasma Seminar, Seoul National University  2023.10.17 

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  • アミノ酸列における類似パターン検索

    小布施祈織

    現象と数理モデル2019  2019.12.14 

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  • Zonal flow formations in two-dimensional Rossby wave turbulence on a rotating sphere Invited International conference

    Kiori Obuse

    3rd Asia-Pacific Conference on Plasma Physics  2019.11.4 

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  • β平面上2次元乱流における帯状流の融合および消滅過程について Invited

    小布施祈織

    2019年第三回理論物理学セミナー  2019.11.1 

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  • Zonal flows formations and nonlinear interactions of Rossby waves in two-dimensional turbulence on a rotating sphere Invited International conference

    Kiori Obuse

    Physical and mathematical applications to geophysical fluid problems  2019.9.7 

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  • 回転球面上二次元乱流におけるジェットの形成

    小布施祈織

    宇宙惑星ジェットの数理, 京都大学  2019.7.30 

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  • 回転球面上2次元乱流内における帯状流 – その生成メカニズムの探求 – Invited

    小布施祈織, 山田道夫

    先端エネルギー理工学セミナー  2019.5.21 

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  • Zonal flow formation in two-dimensional inviscid Rossby wave turbulence on a rotating sphere Invited

    Kiori Obuse, Michio Yamada

    Fluid Dynamics Seminar  2019.2.20 

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  • Effective energy transfer in two-dimensional turbulence on a rotating sphere International conference

    Kiori Obuse, Michio Yamada

    12th European Fluid Mechanics Conference  2018.9 

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  • 非粘性Rossby 波乱流におけるジェット形成

    小布施祈織, 山田道夫

    日本流体力学会2018年度年会  2018.8 

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  • 回転球面上非粘性Rossby 波乱流における東西ジェットの形成

    小布施祈織, 山田道夫

    日本地球惑星科学連合2018年大会  2018.5 

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  • 回転球面上2次元乱流における実効的エネルギー輸送

    小布施祈織, 山田道夫

    日本物理学会第73回年次大会  2018.3 

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  • 回転球面上非粘性2次元乱流における大規模構造形成

    小布施祈織

    女性研究者シーズ発信会  2017.12 

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  • 非粘性Rossby波乱流におけるジェット形成

    小布施祈織, 山田道夫

    研究会”現象と数理モデル2017  2017.12 

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  • Three-wave resonant interactions in two-dimensional turbulence on a rotating sphere International conference

    Kiori Obuse, Michio Yamada

    49th Meeting of the Division for Planetary Sciences, American Astronomical Society  2017.10 

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  • 回転球面上2次元Navier-Stokes乱流における東西ジェット形成機構

    小布施祈織, 山田道夫

    日本物理学会 2017年秋季大会  2017.9 

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  • 回転球面上非粘性Rossby波乱流における東西ジェットの形成 Invited

    小布施祈織, 山田道夫

    第6回岐阜数理科学研究会  2017.8 

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  • An effect of turbulence on zonal jet flows in forced 2D and quasi-geostrophic shallow water models on a beta plane International conference

    Kiori Obuse, Michio Yamada

    SIAM Computational science and Engineering 17  2017.3 

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  • 回転球面上2次元乱流における三波共鳴非線形相互作用

    小布施祈織, 山田道夫

    物理学会第72回年次大会  2017.3 

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  • Effect of turbulence on zonal jet flows in barotropic model and quasi-geostrophic shallow water model International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    Int.Conf. on Applied Mathematics and Computer Science 2017  2017.1 

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  • 回転球面上2 次元Navier-Stokes 乱流における共鳴非線形相互作用

    小布施祈織, 山田道夫

    現象と数理モデル2017  2016.12 

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  • 2次元Stokes流体内境界付近における微生物のダイナミクス Invited

    小布施祈織, Jean-Luc Thiffeault

    流体力学会四国中国支部講演会  2016.11 

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  • An effect of turbulence on a zonal jet flow on a β plane International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    The Computational Techniques and Applications Conference 2016  2016.11 

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  • 2次元回転球面上Navier-Stokes乱流における大規模構造の形成と波の共鳴

    小布施祈織, 山田道夫

    Perspectives in Mathematical Sciences 2016  2016.8 

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  • 2 次元Stokes 流体内における微生物の挙動

    小布施祈織, 山田道夫

    現象と数理モデル  2016.3 

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  • Behaviour of treadmilling swimmers in 2D Stokes flow Invited International conference

    Kiori Obuse, Jean-Luc Thiffeault

    ACCA meeting  2016.2 

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  • Is the forced two-dimension model “good” enough to describe banded structures on giant planets? Invited International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    Colloquium at depertment of physics at École normale supérieure  2016.2 

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  • Behaviour of a treadmilling microorganism near a semi-infinite wall Invited International conference

    Kiori Obuse, Jean-Luc Thiffeault

    Second International ACCA-JP_UK Workshop  2016.1 

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  • Stokes 流体内における微生物のN 体問題

    小布施祈織

    Perspectives in Mathematical Sciences  2016.1 

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  • 微生物の挙動と複素空間内特異点モデル Invited

    小布施祈織, Jean-Luc Thiffeault

    数理モデルとシミュレーション  2015.10 

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  • Large-scale structure in forced two-dimensional turbulence on a rotating sphere Invited International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    International Council for Industrial and Applied Mathematics 2015  2015.8 

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  • A low-Reynolds-number treadmilling swimmer near a semi-infinite wall Invited

    Kiori Obuse

    The 21th Kyoto Univ. Appl. Math. Seminar・ACCA-JP, Kyoto University  2015.7 

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  • 流体内ナノ粒子凝集体再分散過程の数値シミュレーション

    小布施祈織, 青木信明, 宮武知己, 阿尻雅文, 西浦廉政

    日本物理学会第70回年次大会  2015.3 

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  • Nanoparticles’ clusters under the influence of flows International conference

    Kiori Obuse, Nobuaki Aoki, Tomoki Miyatake, Tadafumi Adschiri, Yasumasa Nishiura

    AIMR International Symposium 2015  2015.2 

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  • Merging and disappearing processes of zonal jets in forced 2D Navier-Stokes turbulence on a rotating sphere Invited International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    The 9th International Conference on Computational Physics  2015.1 

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  • Numerical simulation of behavior of nanoparticles under the influence of flows International conference

    Kiori Obuse, Nobuaki Aoki, Tomoki Miyatake, Tadafumi Adschiri, Yasumasa Nishiura

    RIMS Symposium: Mathematical Challenge to a New Phase of Materials Science  2014.8 

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  • Long-time behaviour of zonal flows in two-dimensional turbulence on a rotating sphere Invited International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    Wave Interaction 2014  2014.4 

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  • Large-scale structure formation and its time development in forced two-dimensional turbulence on a rotating sphere International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    Mathematical Science on Big Data Assimilation in Meteorology  2014.3 

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  • Towards mathematical understanding of flow-based re-dispersion processes of flocculated nanoparticles in a solvent International conference

    Kiori Obuse

    AIMR International Symposium 2014  2014.2 

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  • Modelling of multiple-scale inhomogeneous systems Invited International conference

    Kiori Obuse

    AIMR TP-IU Forum  2014.1 

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  • Merging and disappearing processes of zonal jets in forced two-dimensional turbulence on a rotating sphere International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    Zonal flows in geophysical and astrophysical fluids  2013.11 

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  • Behavior of a low-Reynolds-number treadmilling swimmer near semi-infinite wall International conference

    Kiori Obuse, Jean-Luc Thiffeault

    AIMR International Symposium 2013  2013.2 

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  • β平面における帯状流と乱れの効果

    小布施祈織, 竹広真一, 山田道夫

    日本流体力学会2012年度年会  2012.9 

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  • Long-time behaviour of zonal ows in forced two-dimensional Navier-Stokes turbulence on a rotating sphere Invited International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    2012.6 

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  • 回転球面上強制 2 次元 Navier-Stokes 乱流における東西流の長期的振る舞い Invited

    小布施祈織, 竹広真一, 山田道夫

    北海道大学偏微分方程式セミナー  2012.5 

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  • β平面上乱流の影響下にある帯状流の安定性とその時間発展

    小布施祈織, 竹広真一, 山田道夫

    日本地球惑星科学連合2012年度大会  2012.5 

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  • Long-time behavior of zonal flows in two-dimensional turbulence on a rotating sphere Invited

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    Climate Modeling Seminar  2012.2.8 

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  • Zonal flow formation in two-dimensional turbulence on a rotating sphere International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    ESF-JSPS Frontier Science Conference Series for Young Researchers  2012.2 

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  • Long-Time Asymptotic States of Forced Two-Dimensional Turbulence on a Rotating Sphere International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    AIMR International Symposium 2012  2012.2 

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  • Long-time behavior of zonal flows in two-dimensional turbulence on a rotating sphere Invited International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    Atmosphere/Ocean/Climate Dynamics Seminar Series at Yale University  2012.2 

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  • ジェットの形成と発展 -- 2次元回転球面上のNavier-Stokes流 Invited

    小布施祈織, 竹広真一, 山田道夫

    数学連携シーズ探索ミニワークショップ  2011.10 

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  • Instability and merging of jets in turbulent flows on a beta-plane Invited International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    JIFT Workshop  2011.10 

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  • β平面における東西ジェットの相互作用と消滅について

    小布施祈織, 竹広真一, 山田道夫

    日本流体力学会2011年度年会  2011.9 

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  • β平面における帯状流の融合・消滅について

    小布施祈織, 竹広真一, 山田道夫

    日本応用数理学会2011年度年会  2011.9 

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  • β平面における帯状流の相互作用について

    小布施祈織, 竹広真一, 山田道夫

    日本地球惑星科学連合2011年大会  2011.5 

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  • ジェットの形成と発展 -- 2次元回転球面上のNavier-Stokes流

    小布施祈織, 竹広真一, 山田道夫

    Emergent Dynamics in Nonlinear Science  2011.5 

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  • β平面における帯状流の相互作用について

    小布施祈織, 竹広真一, 山田道夫

    日本物理学会 第66回年次大会  2011.3 

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  • GFD Program 2010 at Woods Hole Oceanographic Institution Invited

    Kiori Obuse, Jean-Luc Thiffeault

    14) Kiori Obuse, Jean-Luc Thiffeault, "GFD Program 2010 at Woods Hole Oceanographic Institution" (招待講演), 第31回惑星大気研究会オンラインセミナー/CPSセミナー  2011.1 

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  • Long-time asymptotic states of forced two-dimensional barotropic incompressible flows on a rotating sphere Invited International conference

    Kiori Obuse

    CASPO Wednesday Seminar at Scripps UCSD  2010.9 

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  • Trajectories of a low Reynolds number treadmilling organism near a half-infinite no-slip wall International conference

    小布施祈織, Jean-Luc Thiffeault

    Geophysical Fluid Dynamics Program 2010  2010.8 

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  • 回転球面上の強制2次元乱流の漸近状態 Invited

    小布施祈織, 竹広真一, 山田道夫

    第23回惑星大気研究会オンラインセミナー/CPSセミナー  2010.6 

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  • β平面上の帯状流の安定性と乱れの効果

    小布施祈織, 竹広真一, 山田道夫

    日本地球惑星科学連合2010年大会  2010.5 

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  • Zonal flow formation in two-dimensional turbulence on a rotating sphere International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    Physics and modeling of multi-scale interaction in plasmas  2010.3 

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  • β平面上の帯状流の安定性

    小布施祈織, 竹広真一, 山田道夫

    日本物理学会 第65回年次大会  2010.3 

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  • 回転球面上の強制2次元乱流の漸近状態

    小布施祈織, 竹広真一, 山田道夫

    乱流の統計理論とその応用  2010.3 

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  • Large time asymptotic states of forced two-dimensional turbulences on a rotating sphere International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    2010.2 

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  • 回転球面上の強制2次元乱流の漸近状態

    小布施祈織, 竹広真一, 山田道夫

    乱流の動力学的記述と統計力学的記述の相補性  2010.1 

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  • 回転球面上の強制2次元乱流

    小布施祈織, 竹広真一, 山田道夫

    日本物理学会 2009年秋季大会  2009.9 

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  • Large time asymptotic state of the forced two-dimensional turbulence on a rotating sphere Invited International conference

    Kiori Obuse, Shin-ichi Takehiro, Michio Yamada

    Mathematics and physics across the diversity of turbulence phenomena  2009.7 

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  • 回転球面上における強制 2 次元乱流の漸近状態

    小布施祈織, 竹広真一, 山田道夫

    日本地球惑星科学連合2009年大会  2009.5 

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Awards

  • Best paper award 2020

    2021.5   The Japanese Society of Marine Biotechnology   Comparative Gene Analysis Focused on Silica Cell Wall Formation: Identification of Diatom-Specific SET Domain Protein Methyltransferases

    M.Nemoto, S.Iwaki, H.Moriya, Y. Monden, T. Tamura, K.Inagaki, S. Mayama, K.Obuse

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  • Woods Hole Oceanographic Institution (WHOI, USA) Geophysical Fluid Dynamics Program 2010 Fellow

    2010.6   Woods Hole Oceanographic Institution  

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Research Projects

  • Environment-coupled mechanics of morphogenesis, reproduction, ecology and evolution of microalgae

    Grant number:21H05309  2021.09 - 2026.03

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

    石本健太, 佐藤晋也, 小布施祈織

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    Grant amount:\99190000 ( Direct expense: \76300000 、 Indirect expense:\22890000 )

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  • A study on the formation mechanism of zonal flows in two-dimensional turbulence on a rotating sphere through comparison with those on a beta plane

    Grant number:21K03352  2021.04 - 2024.03

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

    Kiori Obuse

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    Authorship:Principal investigator 

    Grant amount:\4160000 ( Direct expense: \3200000 、 Indirect expense:\960000 )

    ・回転球面上の非強性非圧縮2次元流では、強い西向き周極流が形成されることが知られている。この際、東西流成分の中でも特に赤道対称なもの、すなわちここでの完全系である球面調和関数Y_n^mの n=奇数,m=0 成分のみにエネルギーの輸送が行われるのが特徴である。そこで本研究では、Y_n^0で表される成分の時間発展において、nの偶奇による差が、流れ場の時間発展方程式に含まれる非線形項のどこで現れるのかを、Silberman(1954)の表記を用いて数値的に調べた。その結果、非線形項の形そのものから偶奇による差は生じていないことが分かった。このことは、流れ場における東西流形成メカニズムは、非線形項の形そのもののみで説明できるものではなく、非線形項と流れ場の状況の両方を考慮した議論が必要であることを示唆している。
    <BR>
    ・回転球面上2次元乱流およびβ平面上2次元乱流において十分に時間が経過した後の大規模構造を有した流れ場について、リャプノフ解析を行った。Shimada-Nagashima(1979)の方法により上位15 個のリャプノフ指数を調べたところ、β平面では球面に比べてやや小さな値を有しており、さらに15 個が強く縮退していた。次いでリャプノフベクトルをGinelliら(2007)の方法を用いて数値的に調べたところ、球面でのリャプノフベクトルは全て、各半球にまたがり特に極周辺で強い値を持つ渦巻き状の構造を有することが見いだされた。一方、β平面ではどのリャプノフベクトルでもはっきりとした構造は示されなかった。球面とβ平面でのリャプノフ指数およびリャプノフベクトルが大きく異なる性質を示すことは、少なくともリャプノフ指数やベクトルが関係するような問題において、そしておそらくは長い時間スケールでの流れの変化に関わる問題において、β平面は球面の良い近似とはなっていないことを示唆している。

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  • Non-resonant non-linear interection in fluid equations

    Grant number:17H02860  2017.04 - 2022.03

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

    山田 道夫, 竹広 真一, 米田 剛, 小布施 祈織, 横山 直人

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    Grant amount:\17680000 ( Direct expense: \13600000 、 Indirect expense:\4080000 )

    回転球面上の2次元非圧縮性流体の流れ場の時間発展とその軌道安定性調べるため, リャプノフベクトルの計算を実行し、リャプノフベクトルに極方向へと向かう特徴的な渦巻構造を見出した。引き続き共変リャプノフベクトルの計算準備を進めている。また, 回転球面上の2次元流で見られる帯状流など特徴的な大規模構造の生成と粘性散逸の関係を検証するため, 非粘性極限および非粘性の計算を行っている。
    この系においては、通常の粘性項に対して非粘性極限解と非粘性解が一致することが知られているが、超粘性を用いた場合についても調べ、また、非粘性極限解と非粘性解が一致する場合でも、それがどのような特徴を持つ解であるのかは明らかでないため、高精度数値計算を実行して解の特徴を調べている。その結果、この極限解は形成された帯状流を記述していることを見出した。
    これらと並行して、現実のガス惑星および恒星大気の流体運動の基本的なモデルである回転球殻中の熱対流と平均帯状流生成問題についても整理し今後の方向を検討した。
    流体方程式の解の性質については、流れ場が乱流であるための重要な条件の一つであるzeroth-law、すなわち「エネルギー散逸率の非粘性極限の非消散」を実現するナヴィエ・ストークス方程式の滑らかな解の列を構成した。また、回転楕円面という幾何学的構造が、帯状流(測地線、Euler方程式の定常解)に沿うヤコビ場に対して共役点を生成させることを示した。これはある種のLagrangian安定性を意味するものと考えられる。

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  • 医療用ナノマシンの数理科学的特性解析と設計提案

    2016.09 - 2019.03

    日本学術振興会  科学研究費助成事業(基盤C,特設) 

    小布施祈織

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  • 分離困難な多重小スケールを有する系の数理モデリングと数値解析

    2015.04 - 2018.03

    日本学術振興会  科学研究費助成事業(挑戦的萌芽研究) 

    小布施祈織

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  • Mathematics of amorphous structures and soft ceramics

    Grant number:26310205  2014.07 - 2018.03

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

    Nishiura Yasumasa

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    Grant amount:\14430000 ( Direct expense: \11100000 、 Indirect expense:\3330000 )

    Computational homology, in particular, persistent diagram (PD) was proven to be a nice mathematical descriptor for amorphous structures. It shows an island structure which contrasts with random or liquid case. The software HomCloud was developed to analyze the experimental data.
    A coupled Cahn-Hilliard equations was proposed to model the micro-phase separation of nanoparticles of diblock copolymers and experimentally verified to have a predictable power.A sophisticated MD simulations contributed to the fundamental aspect of dynamics of soft ceramics regarding to shear flows and uniform compression.

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  • Wave-particle duality in dissipative systems

    Grant number:24654018  2012.04 - 2015.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    NISHIURA Yasumasa, TERAMOTO Takashi, OBUSE Kiori, GAO Zhijun

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    Grant amount:\3770000 ( Direct expense: \2900000 、 Indirect expense:\870000 )

    Dynamics of traveling pulses and spots with oscillatory tails were investigated, especially focusing on the properties of wave-particle duality. This duality reflects on the two aspects of the localized traveling waves: one is the particle-like behavior coming from spatial localization and the other is the wave dynamics from the oscillatory tails. Oscillation of the tail part makes the interaction with other objects much more complicated than the monotone tail case. In fact, it is confirmed numerically that the traveling spots display an interference pattern when they go through the heterogeneity of slit type. A finite dimensional ODE system was also derived near a drift bifurcation point and existence and stability of critical points are rigorously shown for the 1D heterogeneous problem.

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Social Activities

  • 2019年度おかやまサイエンス・トーク&トライアル

    Role(s):Lecturer

    岡山大学  2022.7.30

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    Type:Seminar, workshop

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  • サイエンス・ライブ2020 on-line vol.2

    Role(s):Appearance

    岡山大学  2020.12.23

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    Type:University open house

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  • 令和2年度 高大連携事業講師派遣 "木星の縞状構造と数理モデル"

    Role(s):Lecturer

    岡山大学  2020.11.29

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    Type:Visiting lecture

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  • サイエンス・ライブ2020 on-line vol.1

    Role(s):Appearance

    岡山大学  2020.8.8

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    Type:University open house

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  • 2019年度おかやまサイエンス・トーク&トライアル

    Role(s):Lecturer

    岡山大学  2019.8.9

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    Type:University open house

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  • 岡山大学オープンキャンパス2017 模擬授業

    Role(s):Lecturer

    岡山大学  2017.8.6

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    Type:University open house

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  • 公開講座

    Role(s):Lecturer

    岡山大学  2017.7.30

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    Type:University open house

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  • 岡山大学オープンキャンパス2016 模擬授業

    Role(s):Lecturer

    岡山大学  2016.8.6

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    Type:University open house

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  • サイエンストーク

    Role(s):Lecturer

    岡山大学  2016.6.30

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    Type:Visiting lecture

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Academic Activities

  • 現象と数理モデル2022

    Role(s):Planning, management, etc.

    小布施祈織  2022.12.9 - 2022.12.11

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    Type:Academic society, research group, etc. 

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  • 工学と数学の接点をもとめて

    Role(s):Panel moderator, session chair, etc.

    2021.11.26 - 2021.11.27

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    Type:Academic society, research group, etc. 

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  • Division of Plasma Physics Association of Asia Pacific Physical Societies

    Role(s):Panel moderator, session chair, etc.

    2021.9.26 - 2021.10.1

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    Type:Competition, symposium, etc. 

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  • Division of Plasma Physics Association of Asia Pacific Physical Societies 2019

    Role(s):Panel moderator, session chair, etc.

    2019.11.4 - 2019.11.8

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    Type:Competition, symposium, etc. 

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  • 現象と数理モデル 2018

    Role(s):Planning, management, etc.

    小布施祈織  2018.12.15 - 2018.12.17

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    Type:Academic society, research group, etc. 

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  • 現象と数理モデル2016

    Role(s):Planning, management, etc.

    小布施祈織  2016.12.26 - 2016.12.28

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    Type:Academic society, research group, etc. 

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  • Workshop on Micro-Organisms in Stokes Flows

    Role(s):Planning, management, etc.

    2016.8.31

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    Type:Academic society, research group, etc. 

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  • Perspectives in Mathematical Sciences 2016

    Role(s):Planning, management, etc.

    小布施祈織  2016.7.17 - 2016.7.19

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    Type:Academic society, research group, etc. 

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  • 現象と数理モデル2015

    Role(s):Planning, management, etc.

    小布施祈織  2016.3.7 - 2016.3.9

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    Type:Academic society, research group, etc. 

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  • Perspectives in Mathematical Sciences 2015

    Role(s):Planning, management, etc.

    小布施祈織  2016.1.6 - 2016.1.8

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    Type:Academic society, research group, etc. 

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