Abstract
A brief review of formulas used for the thermal conductivity of gas mixtures in CFD simulations of rocket combustion chambers is carried out in the present work. In most cases, the transport properties of mixtures are calculated from the properties of individual components using special mixing rules. The analysis of different mixing rules starts from basic equations and ends by very complex semi-empirical expressions. The formulas for the thermal conductivity are taken for the analysis from the works on modelling of rocket combustion chambers. \(\hbox {H}_2{-}\hbox {O}_2\) mixtures are chosen for the evaluation of the accuracy of the considered mixing rules. The analysis shows that two of them, of Mathur et al. (Mol Phys 12(6):569–579, 1967), and of Mason and Saxena (Phys Fluids 1(5):361–369, 1958), have better agreement with the experimental data than other equations for the thermal conductivity of multicomponent gas mixtures.
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Zhukov, V.P., Pätz, M. On thermal conductivity of gas mixtures containing hydrogen. Heat Mass Transfer 53, 2219–2222 (2017). https://doi.org/10.1007/s00231-016-1952-9
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DOI: https://doi.org/10.1007/s00231-016-1952-9