F102 A remark of the boundary condition of the reflected gas molecule at the wall surface for the thermal problem

Abstract

The gas-wall interaction is investigated for the thermal problem between two walls whose temperature is different each other. The wall consists of platinum molecules, and the gas is taken to be argon. It is found that the distribution function of the reflected molecule is close to that of Maxwellian type. The Maxwell type boundary condition describes well the distribution function of the reflected molecule if a proper accommodation coefficient is taken.