研究者詳細 - 山田　寛

MISC - 山田　寛

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Wettability of Ionic Liquid on Single Carbon Nanotubes

Yutaka Yamada, Koji Takahashi, Yasuyuki Takata, Khellil Sefiane, Naoto Haruki, Akihiko Horibe

Prceedings of The Fourth International Forum on Heat Transfer (IFHT2016) 2016年

複合収着剤粒子層の有効熱伝導率測定

堀部明彦, 春木直人, 山田寛, 瀬川稜介

日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference D141 - 1-6 2016年

収着剤塗布小型ハニカムユニットの水分移動特性

堀部明彦, 春木直人, 山田寛, 谷本和史, 中村崇, 丸山智弘

日本冷凍空調学会年次大会講演論文集 Proceedings of the JSRAE Annual Conference D152 - 1-6 2016年

FIB照射による濡れ性変化を用いた液滴核生成の制御

山田寛, 生田竜也, 西山貴史, 高橋厚史, 高田保之

熱工学コンファレンス2015講演論文集 2015年10月

C215 ESEMを用いたグラファイト面上の液滴凝縮過程に関する研究(OS-9:沸騰・凝縮伝熱および混相流の最近の展開(3))

山田寛, 草場彰, 生田竜也, 西山貴史, 高橋厚史, 高田保之

熱工学コンファレンス講演論文集 2013 333 - 334 2013年10月

記述言語：日本語出版者・発行元：一般社団法人日本機械学会

Heat transfer performance of dropwise condensation is higher than filmwise one due to droplet removal from the condensed surface. In order to further enhancement of its performance, removal of microscale droplet is a key issue. However, condensation mechanism at microscale on hydrophobic-hydrophilic hybrid surface is not understood, although all surfaces are consisted with those combinations. In this study, we conducted condensation experiments on a graphite surface at 0℃ and 550 to 600 Pa by using environmental scanning electron microscope (ESEM). Nanoscale step-terrace structures on graphite surface are obtained by using an atomic force microscope (AFM) before ESEM experiments. It was found that condensed droplets with diameter of 150 to 300 nm are lined up along step edges at over 150 nm intervals. In addition, we found that most droplets are on the steps of height of 1 nm and shorter droplet intervals are induced by higher steps and shorter terrace width. Our results were analyzed by an extended nucleation theory and we found that water molecules attracted on steps play an important role for droplet condensation.

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B121 カーボンナノチューブ-周囲気体間の熱伝達に関する実験的研究(OS-6:マイクロ・ナノ熱工学(2))

廣谷潤, 山田寛, 生田竜也, 西山貴史, 高橋厚史

熱工学コンファレンス講演論文集 2012 43 - 44 2012年11月

記述言語：日本語出版者・発行元：一般社団法人日本機械学会

Carbon nanotubes (CNTs) have high intrinsic thermal conductivity and high surface-to-volume ratio, thus CNT-based fins is considered to be promising for hign performance device cooling. In addition, exploring the heat transfer between a CNT and gases is important not only for CNT-based gas sensors but also for scientific interest oi mterfacial heat transport. In this work, we have developed novel technique for measuring heat transfer coefficients between an individual carbon nanotube and surrounding gases (Air, N_2, Ar, He) using platinum hot film sensor. Measured heat transfer coefficients quantitatively show good agreement with estimated values by kinetic gas theory at atmospheric pressure but do not match with theoretical prediction at low pressure regime.

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