Article Dans Une Revue Physics of Fluids Année : 2021

Mesoscopic Boltzmann model equations for thermally perfect gases

Résumé

We propose an extension of the Ellipsoidal-Statistical BGK model to account for discrete levels of vibrational energy in a rarefied polyatomic gas. This model satisfies an H-theorem and contains parameters that allow to fit almost arbitrary values for the Prandtl number and the relaxation times of rotational and vibrational energies. With the reduced distribution technique, this model can be reduced to a three distribution system that could be used to simulate polyatomic gases with rotational and vibrational energy for a computational cost close to that of a simple monoatomic gas. Contents

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hal-03960759 , version 1 (27-01-2023)

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Julien Mathiaud, Luc Mieussens. Mesoscopic Boltzmann model equations for thermally perfect gases. Physics of Fluids, 2021, 33 (12), pp.127112. ⟨10.1063/5.0075395⟩. ⟨hal-03960759⟩
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