Motion of an array of plates in a rarefied gas caused by radiometric force

 

 

报告人:                Prof. Kazuo Aoki

Department of Mechanical Engineering and Science,

Kyoto University, Kyoto, Japan

时间：2015年8月20日(周四) 10: 00

地点：中国科学院力学研究所会议中心（5号楼）207会议室

报告摘要：

We consider an infinitely long two-dimensional channel containing a rarefied gas. Inside the channel, there is an array of infinitely many two-dimensional plates (with finite width and without thickness) perpendicular to the axis of the channel, and the array can move freely along the channel. If one side of each plate of the array is heated and the other side is not, it is subject to a force because of the temperature difference on its two sides (radiometric force). In consequence,the array starts moving, and finally its motion reaches the steady motion with a constant velocity, where the radiometric force and the drag force acting on each plate counterbalance. We investigate the behavior of the gas in this final steady motion and obtain the speed of the array numerically on the basis of kinetic theory, for a wide range of the Knudsen number. The present problem can be regarded as a simplified model for the moving vanes of the Crookes radiometer. This is a joint work with Satoshi Taguchi (University of Electro-Communications, Chofu, Tokyo, Japan).

报告人简介：

Kazuo Aoki is a Professor at the Department of Mechanical Engineering and Science, Kyoto University, Japan. His specialty is rarefied gas dynamics, especially, asymptotic and numerical studies of rarefied or microscale gas flows. He is a member of the Advisory Committee of the International Symposia on Rarefied Gas Dynamics and is one of the three editors-in-chief of the journal Kinetic and Related Models. He is also in the editorial and advisory boards of different international journals, such as Communications in Computational Physics and Fluid Dynamics Research.