ALE框架下虚拟流体方法模拟移动边界的一维可压缩多介质流动问题

GFM for One-Dimensional Compressible Multi-Material Flows with Moving Boundary on ALE Frame

在ALE框架下采用Ghost Fluid方法处理移动边界的一维可压缩多介质流动问题。在边界处网格跟随边界移动从而可以追踪物质边界,内部网格不断调整从而改善整体网格质量。使用ALE框架下Level Set方程追踪物质界面。利用虚拟流体把多介质问题转化为多个单介质问题,避免物质界面附近非物理振荡。

We use the ghost ?uid method to deal with the moving boundary one-dimensional compressible multi-material ?ows problem on ALE schemes. The grids at the boundary move along the boundary to keep track the moving boundary while the inner grids are adjusted continuously to improve the over-all grid quality. Trace the material interface using Level set equation on ALE schemes. Transform the multi-material ?ows problem into single-medium problems to avoid non-physical oscillations near the material interface through ghost ?uid.