Open AccessFEATURES OF ISOTHERMAL MULTICOMPONENT MIXING OF GAS MIXTURES CONTAINING METHANES AT CONVECTIVE INSTABILITY
Author(s) -
Vladimir Kossov,
В. Мукамеденкызы,
Aiym Zhussanbayeva
Publication year - 2020
Publication title -
habaršy. fizika-matematika seriâsy
Language(s) - English
Resource type - Journals
ISSN - 1728-7901
DOI - 10.51889/2020-3.1728-7901.16
Subject(s) - convection , isothermal process , instability , ternary operation , diffusion , mixing (physics) , thermodynamics , convective mixing , convective instability , molecular diffusion , mechanics , chemistry , rayleigh–taylor instability , materials science , physics , metric (unit) , operations management , quantum mechanics , computer science , economics , programming language
The features of the change in the regimes "diffusion-gravitational concentration convection" in isothermal ternary gas mixtures have been studied experimentally and numerically. It is shown that, at a certain pressure, due to the difference in the diffusion coefficients of the components, an instability of mechanical equilibrium arises, leading to the appearance of structured convective formations. Calculation results are compared with experimental data on the location of the instability boundaries in the studied gas mixtures. Intensity of convective mixing is also influenced by the content of the component with the highest molecular weight in the initial mixture. In terms of Rayleigh numbers, a boundary relation is obtained that determines the regime change. The solution of the problem of multicomponent mixing in a cylindrical vertical channel of finite height with solid and impermeable boundaries for the substance made it possible to determine the concentration distribution along the length.