Simulation of Flow of a Binary Gas Mixture in a Cylindrical Microchannel with Moving Walls

Flow of a rarefied gas mixture (neon-argon) in a cylindrical channel under the action of a pressure gradient and in the presence of wall rotation in the direction opposite to the gas flow is investigated. The problem is studied numerically using the direct simulation Monte Carlo (DSMC), method. It is shown that the combination of the pressure gradient and wall rotation leads to the effect of separation of the gas mixture during flow in the rarefied regime. The dependence of the separation effect on the wall rotation speed, the degree of rarefaction of the gas, and the channel length is studied.