...
首页> 外文期刊>Journal of Computational Physics >AN IMPLICIT EXPLICIT EULERIAN GODUNOV SCHEME FOR COMPRESSIBLE FLOW
【24h】

AN IMPLICIT EXPLICIT EULERIAN GODUNOV SCHEME FOR COMPRESSIBLE FLOW

机译:可压缩流的隐式显式EULERIAN GODUNOV方案

获取原文
获取原文并翻译 | 示例
           

摘要

A hybrid implicit-explicit scheme is developed for Eulerian hydrodynamics. The hybridization is a continuous switch and operates on each characteristic field separately. The explicit scheme is a version of the second-order Godunov scheme; the implicit method is only first-order accurate in time but leads to a block tridiagonal matrix inversion for efficiency and is unconditionally stable for the case of linear advection. The methodology is described for the cases of linear advection, for nonlinear scalar problems, and for gas dynamics. An important element of our work is the use of a modified Engquist-Osher flux function in place of the Godunov flux. Several numerical results are presented to demonstrate the properties of the method, especially stable numerical shocks at very high CFL numbers and second-order accurate steady states. (C) 1995 Academic Press, Inc. [References: 24]
机译:针对欧拉流体力学开发了一种混合隐式-显式方案。杂交是一个连续的开关,并且分别在每个特征场上运行。显式方案是二阶Godunov方案的版本;隐式方法仅在时间上是一阶准确的,但会导致块三对角矩阵求逆,从而提高效率,并且在线性对流情况下是无条件稳定的。描述了用于线性对流,非线性标量问题和气体动力学的方法。我们工作的一个重要要素是使用改良的Engquist-Osher通量函数代替Godunov通量。给出了几个数值结果,以证明该方法的特性,特别是在非常高的CFL数和二阶精确稳态下的稳定数值冲击。 (C)1995 Academic Press,Inc. [参考:24]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号