EXACT AND APPROXIMATE RIEMANN SOLVERS FOR REAL GASES

被引:39
作者
SAUREL, R
LARINI, M
LORAUD, JC
机构
[1] IUSTI CNRS URA 1168, Universite de Provence, Marseille Cedex 20, Avenue Escadrille Normandie Niemen
关键词
D O I
10.1006/jcph.1994.1086
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
A procedure is developed for solving the Riemann problem (RP) for the flow of gases obeying an equation of state (EOS) of the form p = p(rho, T). A first method is introduced, producing solutions of the exact RP; the algorithm is validated by applying it to the classical test case of the shock-tube, for a perfect gas. Thereafter, the method is applied to gases having EOS of the Van der Waals or virial types, with very good resulting accuracy; however, the procedure is somewhat demanding in computer time. Therefore, some simplifying assumptions are introduced into the computation of simple waves, leading to an approximate solution of the RP; in most circumstances, excellent results are obtained, and the computer time is much more competitive. However, under certain extreme flow conditions, it is recommended that a combination of the exact and approximate solvers for the RP be employed. (C) 1994 Academic Press, Inc.
引用
收藏
页码:126 / 137
页数:12
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