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| 日時： | 2022年12月22日（木）16:30-17:30 |
| 場所： | 京都大学 桂キャンパスCクラスタ総合研究棟III（C3棟） 3階 b3n03室（航空宇宙工学専攻会議室） |
| 講演： | Modeling and experiments on thermophoresis in microfluidic systems |
| Prof. Tetsuro Tsuji (Department of Advanced Mathematical Sciences, Kyoto University, Japan) 辻徹郎 准教授（京都大学大学院 情報学研究科 先端数理科学専攻） |
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| 要旨： | Thermophoresis is the motion of tiny particles induced by the temperature gradient of surrounding fluids. Recent advances in experimental techniques to produce a steep temperature gradient in fluids have developed novel manipulation methods of nano- and microscale materials using thermophoresis. In the present talk, some trials to understand thermophoresis and its applications to microfluidics will be presented. More specifically, in the first part of the talk, a kinetic model on thermophoresis of Brownian particles is introduced to elucidate the mass effect on thermophoretic mobility. Furthermore, a molecular dynamics simulation is carried out to investigate the effect of interaction potential on the direction of thermophoretic motion. The second part of the talk will include the results of some microfluidic experiments. The aims of the experiments are two-fold: one is to obtain fundamental characteristics of thermophoresis and the other is to apply thermophoresis in microfluidic devices for concentration and separation. Some ongoing trials to investigate the origin of thermophoresis will be also presented. |