题目：王春武教授谈“The interface treating method for compressible multi-medium flow”

时间：10月25日（周五）10:45

地点：勤园21号楼306学术报告厅

主讲人：王春武教授，2000年在南京航空航天大学计算流体力学专业获博士学位，2002-2004年新加坡高性能计算研究所博士后，2009年美国布朗大学应用数学系访问学者。现为南京航空航天大学理学院执行院长，主要从事流体力学高精度数值方法及多介质流动问题的数值模拟方法研究。主持了国家自然科学基金、军委科技委基础物理研究项目、国防预研基金和国家重点实验室基金等多项科研基金。现已在国内外核心期刊发表论文30多篇。

内容简介：An interface treating method is proposed for multi-medium flow. In this method, the level set equation is employed to track the medium interface. The Riemann problems are constructed at the interface and solved to define the interface boundary conditions. By doing so the computation is thereby carried out as if in a single medium and the high order accuracy schemes can be used to dicretize the Euler equation directly. This method has been extended to simulate the compressible multi-medium flow on triangular meshes. A conservative interface treating method is also presented if we include the states in the mixed cells. Besides, the adaptive moving mesh method is also coupled to this method to reduce both the numerical and conservative errors. Several numerical experiments are conducted to demonstrate robustness and efficiency of the presented methods. The results show that our algorithm can capture the shock waves and the material interface accurately, and is stable and robust even for solutions with large density and pressure gradients.