A Simple Theory of Multicomponent Diffusion and Simulation of the Combustion of a Stoichiometric H2/O2 Mixture

К. О. Сабденов, Maira Erzada, A. T. Suleimenov

2022

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DOI 10.1134/s1063784222030045
Data confidence 70 medium
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Abstract

Abstract A theory of multicomponent diffusion based on Fick’s law is proposed, in which, when writing the Maxwell–Stefan equations, a multicomponent mixture appears to consist of two components: the isolated substance and all the others with average characteristics. The number of diffusion coefficients is significantly reduced, a method for calculating them is indicated, and they strongly depend on the concentration of the mixture components. Based on the results of this theory, we simulated the combustion of a stoichiometric H2/O2 mixture. For each component, large chemical works are carried out with variable signs, but in total they partially destroy each other. The analysis of the effect of changing the composition of the mixture on the transfer processes, temperature, and combustion rate was carried out.