The European Physical Journal Special Topics

, Volume 226, Issue 6, pp 1177–1187

Diffusion and convective instability in multicomponent gas mixtures at different pressures

Regular Article
Part of the following topical collections:
  1. IMA8 - Interfacial Fluid Dynamics and Processes


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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© EDP Sciences and Springer 2017

Authors and Affiliations

  1. 1.Abai Kazakh National Pedagogical University, Dostyk 13AlmatyKazakhstan
  2. 2.Institute of Experimental and Theoretical Physics, al-Farabi Kazakh National University, Al-Farabi 71AlmatyKazakhstan

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