A hybrid kinetic/fluid model for solving the gas dynamics Boltzmann-BGK equation

JOURNAL OF COMPUTATIONAL PHYSICS

卷:199

Article

Crouseilles, N ; Degond, P ; Lemou, M

关键词: BGK equation;    Euler equations;    entropy minimization principle;    kinetic-hydrodynamic coupling;    numerical schemes;   

DOI  :  10.1016/j.jcp.2004.03.007

来源: Elsevier

【 摘 要 】

Our purpose is to derive a hybrid model for particle systems which combines a kinetic description of the fast particles with a fluid description of the thermal ones. In the present work, fast particles will be described through a collisional kinetic equation of Boltzmann-BGK type while thermal particles will be modeled by means of a system of Euler type equations. Then, we construct a numerical scheme for this model. This scheme satisfies exact conservation properties. We validate the approach by presenting various numerical tests. (C) 2004 Elsevier Inc. All rights reserved.

【 授权许可】

Free