Open AccessMulticomponent mixing on the “diffusion – convection” transition boundary at elevated pressures
Author(s) -
Vladimir Kossov,
О. В. Федоренко,
Magzhan Zhaneli,
K Mukhatova
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2150/1/012014
Subject(s) - dimensionless quantity , rayleigh number , thermodynamics , convection , mechanics , perturbation (astronomy) , instability , ternary operation , mixing (physics) , reynolds number , boundary value problem , diffusion , physics , natural convection , mathematics , turbulence , mathematical analysis , quantum mechanics , computer science , programming language
An experimental and theoretical study of three-component mixing at the “diffusion – convection” boundary at elevated pressures is carried out. It is shown that the pressure dependence of the dimensionless parameter α , defined as the ratio of the experimental values of the component concentrations to those calculated by the Stefan-Maxwell equations, has characteristic regions due to the interaction of structural formations moving towards each other, in which a transition from one critical motion to another occurs. Within the framework of a linear analysis of the stability of a ternary gas mixture for a vertical circular cylinder channel, it is shown that scale perturbations determining the transition from one type of flow to another correspond to a certain value of the perturbation mode n and the critical Rayleigh numbers.