Navier–Stokes boundary conditions of a gas mixture

Abstract

The Navier–Stokes velocity and density boundary conditions of a multicomponent gas mixture in front of a wall are considered. The following gas–wall interactions are taken into account: partially inelastic interactions between the gas molecules and the wall (accommodation), conversion among the different molecule species (ionization, etc.), and gas flow through the wall. Since the influence of the kinetic boundary layer on the gas continuum is negligible, the moments in the boundary conditions for the Navier–Stokes equations are calculated with the first-order Chapman–Enskog solution (Maxwell’s method).