An ES-BGK model for vibrational polyatomic gases
Statistical Mechanics
2020-07-07 v1 Mathematical Physics
Analysis of PDEs
math.MP
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.
Cite
@article{arxiv.2007.02727,
title = {An ES-BGK model for vibrational polyatomic gases},
author = {Y Dauvois and J. Mathiaud and Luc Mieussens},
journal= {arXiv preprint arXiv:2007.02727},
year = {2020}
}