Abstract
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 inside the pumps are given. The results obtained with different molecular models are compared and the influence of the molecular potentials on macroscopic flow parameters is shown. The simulations are performed in plane and 3D geometries.
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