Heat flux in binary gas mixtures confined between two parallel plates via moment equations

摘要

The steady heat transfer problem in two-component gas mixtures of noble (monatomic) gases confined between two infinite parallel plates having different temperatures has been investigated with the Grad 13- and 26-moment equations for Maxwell molecules as well as for hard-sphere molecules. The heat flux normal to the plates is computed via the aforementioned models for three gas mixtures, namely neon-argon, helium-argon and helium-xenon, for different mole fraction ratios. The heat flux profiles computed through the Grad moment equations in this work turn out to be in reasonably good agreement with those obtained through the discrete velocity method in [1].