多孔質を用いたクヌッセンポンプ(バイオ・マイクロ・スポーツの流れ分子スケール(3),一般講演)

概要

論文の詳細を見る
A rarefied gas flow in a porous medium consisting of periodically arranged arrays of circular cylinders with small and large diameters is considered on the basis of kinetic theory. The temperature of the medium is such that it is increasing in one array and decreasing in another, forming a periodic temperature distribution throughout the medium. This is a Knudsen compressor making use of porous media in place of pipes. Under the assumption that the period of the cylinder array is much smaller than the length scale of the temperature variation, a macroscopic fluid model that describes the pressure distribution as well as the mass flux of the gas in each array is derived on the basis of the BGK model and diffuse reflection condition by homogenization. Then, on the basis of this model, a flow in the whole structure is simulated. It is confirmed that this device is capable to compress the gas and thus works as a pump.
日本流体力学会の論文
2009-09-02