Abstract
We recall recent large size “physical” discrete velocity models (DVMs) results [1] for a gas in a half-plane (z> 0xbeing the other coordinate) and present new ones. We consider both single-gas and binary mixtures with light mass 1 and heavy mass M. For the half-space (flow of a semi-infinite expanse of gas in contact with its condensed phase), the interface is located atz= 0 with only a z spatial dependence of the gas (densities with (±x z) are equal) and no velocities parallel to the x-axis (orz= 0). We construct “physical” DVMs, (only mass, energy and momentum along the z-axis invariants, no spurious invariants), filling all integer coordinatesz≠ 0 of the plane.The main new result for mixturesis that we present different M models with thesame geometrical structure in the planewith sums of the moduli of the coordinates either odd or even for heavy or light species.
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