Transport between a drifting and a non-drifting gas near the edge of a thin separating wall is investigated. Monte Carlo simulations show that net transport of particles takes place predominantly near the edge of the wall. The effects of drift velocity, proximity to the edge, Maxwellian speed...

Effusion of an ideal gas through a small orifice when a drifting gas exists past the orifice, as well as the reverse process, are investigated through extensive two-dimensional Monte Carlo simulations. It is found that a net transport of particles takes place toward the side containing the...