关键词: 熵条件, 二阶TVD格式, 嵌套网格技术, 分区算法, Euler方程数值模拟

Abstract: A domain decomposition method based on chimera grids is proposed for Euler solver. The solver is developed based on a class of second order TVD difference schemes with a new entropy condition. The developed procedure is capable of handling the steady and unsteady flows over multibodies located separately, or in contact, or under relative motion with each other. The procedure is demonstrated by a test case of supersonic flows over two circular cylinders parted by different distances. A detail result is presented. The procedure is then applied to simulate the rotating flow fields over rockets with canard rudders.

Key words: entropy condition, second order TVD scheme, chimera grids, domain decomposition method, numerical simulation of Euler equations