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The paper presents some results of computing of a gas mixture flows in Knudsen pumps. The simulations are carried out by numerically solving the Boltzmann kinetic equation by the conservative projection method. Interactions of gas molecule are modeled by Lennard-Jones and the newest ab initio potentials. The values of the pumping rate, gas mixture separation, and the graphics of gas flow parameters...
A rarefied gas flow through a thin orifice is calculated for the three noble gases, helium, argon and krypton, applying the direct simulation Monte Carlo method based on the ab initio potential. The calculations have been carried out over the whole range of the gas rarefaction and for several values of the pressure ratio with the numerical error less than 0.5%. A comparative analysis showed that the...
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