Nonisothermal flow of a gas mixture in a channel with intermediate Knudsen numbers
Abstract
A 20moment approximation of the distribution function is used to analyze the flow of a gas mixture in a plane channel at intermediate Knudsen numbers. The method is based on the averaging of the moment equations, valid in the whole flow region (including the Knudsen layers); Loyalka's (1971) approximate method is used to determine the boundary conditions of the macroscopic parameters on the wall. In the case of a binary mixture, expressions are obtained for the crosssectionaveraged meanmolar velocity of the mixture, the velocity difference of the components, and the relative heat flux in the presence of longitudinal gradients of partial pressure and a temperature gradient. The corresponding kinetic coefficients of the Onsager matrix are calculated and examined as a function of Knudsen number.
 Publication:

Prikladnaia Matematika i Mekhanika
 Pub Date:
 December 1981
 Bibcode:
 1981PriMM..45.1063Z
 Keywords:

 Channel Flow;
 Computational Fluid Dynamics;
 Gas Dynamics;
 Gas Mixtures;
 Knudsen Flow;
 Nonisothermal Processes;
 Heat Flux;
 Kinetic Equations;
 Partial Pressure;
 Temperature Gradients;
 Fluid Mechanics and Heat Transfer