激波与物质界面相互作用的数值模拟

张 斌; 刘 宇; 王 革

激波与物质界面相互作用的数值模拟

张斌¹,
刘宇¹,
王革²

1.
北京航空航天大学宇航学院, 北京 100191
2. 哈尔滨工程大学航天工程系, 哈尔滨 150001

详细信息

作者简介:
张斌(1983-)男,湖南株洲人,博士生,zhangbin.1983@yahoo.com.cn.

中图分类号: O 242
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出版历程
- 收稿日期: 2008-10-06
- 网络出版日期: 2009-10-31

Numerical simulation of shock impact on material interface

1.
School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
2. Department of Aerospace Engineering, Haerbin Engineering University, Harbin 150001, China

摘要

摘要: 计算激波与物质界面相互作用问题的关键是精确捕获运动物质界面.采用level set捕获物质界面,用改进虚拟流(modified ghost fluid method)方法定义虚拟流节点参数,从而将多介质流问题分解成多个单一介质流问题求解.应用该方法对激波与物质界面相互作用系列问题进行了数值模拟,并给出了物质界面的演化过程.计算结果发现激波强度、物质界面对涡的形式有很大影响,界面两边的密度比决定了界面是否反转.
- euler方程 /
- level set方法 /
- 改进虚拟流 /
- 激波 /
- richtmyer-meshkov不稳定性
Abstract: The key of numerical simulation of the problems of shock impact on interface is capturing accurately the material interfaces. The position of material interfaces were captured by level set, the parameter of ghost points were defined by modified ghost fluid method, accordingly the problem of multi-interfaces was split into several the problems of signal material interface. Based on the methods mentioned above, the numerical simulation of the series problems of shock impact on material interface were presented, and the evolvement of material interfaces were given. It is found that the strength of shock wave and the shape of material interface have great effect to vortex, whether or not the interface reverse depends on the density of two materials.
- euler equations /
- level set method /
- modified ghost fluid method /
- shock /
- richtmyer-meshkov instability

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参考文献(1)

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