MGFM在强激波与物质界面作用中的应用

Modified ghost method for strong shock impacting on material interface

原始的虚拟流方法(GFM)在计算强激波和物质界面作用时无法得到正确的计算结果,而改进虚拟流方法(MGFM)处理这类问题的能力大大提高。本文用Level set捕获物质界面,用MGFM方法定义虚拟流节点参数,Euler方程采用HLLC格式离散求解,完成了强激波和物质界面作用的一维和二维数值实验。结果表明改进虚拟流方法在强激波与物质界面作用中的应用是成功的。

It is found that the original ghost fluid method does not work well when applied to strong shock impacting on material interface. While modified ghost method can handle this kind of problems well. In this work, the position of material interfaces were captured by Level set, the parameter of ghost points were defined by MGFM, and HLLC was applied to solve Euler equations. Numerical results of 1- d and 2-d cases show that MGFM was applied successfully in strong shock impacting on material interface.