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arXiv · 2007.02727

An ES-BGK model for vibrational polyatomic gases

Y Dauvois·J. Mathiaud·Luc Mieussens
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Abstract

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.

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Y Dauvois, J. Mathiaud, Luc Mieussens. 2020-07-03. An ES-BGK model for vibrational polyatomic gases. https://arxiv.org/abs/2007.02727

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