Diffusion and convective mixing modes of binary gas mixtures dissolved in the third component

Abstract

Abstract The numerical investigation of the mixing of an isothermal binary gas mixture dissolved in the third component has been carried out. The boundary relation that determines the change of “diffusion – concentration convection” modes is obtained in the framework of a linear stability analysis for a flat vertical channel with mass-impermeable walls. Diffusion and convection regimes were studied for a mixture of a pair of gases H2 and Ar, which was diluted first with a light and then with a heavier component. It is shown that the nature of the ballast gas has a significant effect on the diffusion and convective mixing regimes of the main diffusing components.