Diffusion and convective instability in multicomponent gas mixtures at different pressures
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The instability of mechanical equilibrium in the gas mixtures 0.5538 H2 + 0.4462 N2 – CH4 and 0.8846 H2 + 0.1154 CH4 – He at different pressures is experimentally studied. It is shown, that the convective instability, which significantly intensifies multicomponent mass transfer, occurs as the pressure increase. Within the linear theory of stability, the parameters of the transition from the diffusion mixing to the convective one in a channel of final dimensions are determined. The comparison between the experimental and calculated data shows satisfactory fit between them.
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