https://doi.org/10.1140/epjst/e2016-60201-1
Regular Article
Diffusion and convective instability in multicomponent gas mixtures at different pressures
1 Abai Kazakh National Pedagogical University, Dostyk 13, 050010 Almaty, Kazakhstan
2 Institute of Experimental and Theoretical Physics, al-Farabi Kazakh National University, Al-Farabi 71, 050040 Almaty, Kazakhstan
a e-mail: kosov_vlad_nik@list.ru
Received: 30 June 2016
Revised: 28 August 2016
Published online: 2 May 2017
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.
© EDP Sciences, Springer-Verlag, 2017
