期刊
JOURNAL OF COMPUTATIONAL PHYSICS
卷 195, 期 2, 页码 655-676出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcp.2003.10.015
关键词
rarefied and microscale gas dynamics; diatomic gases; generalized hydrodynamic equations; finite volume method
On the basis of Eu's generalized hydrodynamics, a computational model is developed for the numerical simulation of rarefied and microscale diatomic gas flows. The rotational nonequilibrium effect is taken into account by introducing excess normal stress associated with the bulk viscosity of the gas. The computational model for diatomic gases reduces to the model for monatomic gases in the limit of vanishing bulk viscosity. The thermodynamically consistent computational model is applied to the one-dimensional shock wave structure and the two-dimensional hypersonic rarefied flow around a blunt body in order to demonstrate its capability and validate the numerical results. The general properties of the constitutive equations are also presented through a simple analysis. The numerical results show that the new generalized hydrodynamic computational model yields the solutions in qualitative agreement with experimental data and DSMC results in the case of the problems studied. (C) 2003 Elsevier Inc. All rights reserved.
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