摘要
本文研究了提出的拉格朗日坐标下气体力学方程组的完全守恒型差分格式,并给出了一种改进形式。对激波管问题所做的数值计算表明改进的格式具有激波过渡区窄,过跳与低亏小的优点,而且所需的计算时间远低于文[2]中的格式。
In the paper,a improved form of the fully conservative finite difference schemes, established by Samarski and Popov(2), for gas dynamics equations in Lagrangian form is presented. To check the quality of the improved scheme, two problems are computed. The first test problem is the typical shock tube problem used by Sod(3). Then the flow fields in a large Shock tube of variable cross sectional ares(4) is computed. The numerical results show that the improved scheme is more efficent than Samarski and Popov's schemes. Meanwhile the nonphysical oscillation and the numerical dissipation also are reduced.
出处
《计算物理》
CSCD
北大核心
1989年第4期392-398,共7页
Chinese Journal of Computational Physics
