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Article Dans Une Revue European Journal of Mechanics - B/Fluids Année : 2022

An ES-BGK model for diatomic gases with correct relaxation rates for internal energies

Résumé

We propose a new ES-BGK model for diatomic gases which allows for translational-rotational and translational-vibrational energy exchanges, as given by Landau-Teller and Jeans relaxation equations. This model is consistent with the general definition of the vibrational and rotational collision numbers that are also commonly used in DSMC solvers. It is proved to satisfy the H-theorem and to give the correct transport coefficients, up to the volume viscosity. Contents
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Dates et versions

hal-03960779 , version 1 (27-01-2023)

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Julien Mathiaud, Luc Mieussens, M. Pfeiffer. An ES-BGK model for diatomic gases with correct relaxation rates for internal energies. European Journal of Mechanics - B/Fluids, 2022, 96, pp.65-77. ⟨10.1016/j.euromechflu.2022.07.003⟩. ⟨hal-03960779⟩
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