| 王兵,司海青.时刻追踪多介质界面运动的动网格方法[J].计算力学学报,2010,27(2):362~368 |
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| 时刻追踪多介质界面运动的动网格方法 |
| Moving grid method in numerical simulation of compressible multi-material flows |
| 投稿时间：2008-03-31 修订日期：2009-10-23 |
| DOI：10.7511/jslx20102035 |
| 中文关键词: 可压缩多介质流 运动网格 网格局部重构 AL E 方程组 HLLC 格式 |
| 英文关键词:Compressible multi-material flows Moving Grids Grid local re-meshing technology AL E formulations HLLC Scheme |
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| 摘要点击次数: 1834 |
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| 中文摘要: |
| 在对可压缩多介质流动的数值模拟中,定义介质界面为一种内部边界,由网格的边组成,界面边两侧对应两种不同介质中的网格。通过求解Riemann 问题追踪介质界面上网格节点的运动,同时采用局部重构的动网格技术处理介质界面的大变形问题,并将介质界面定义为网格变形边界,以防止该边界上网格体积为负。运用HLLC 格式求解AL E 方程组得到整个多介质流场的数值解。最后从几个多介质流模型的计算结果可以看出,本文的动网格方法是可行的,而且可以时刻追踪介质界面的运动状态。 |
| 英文摘要: |
| In the numerical simulation of compressible multi-material flows, the material interface is defined as a special internal boundary composed by unst ruct ured grid edges, either side of which corresponds to a grid of one material. Riemann problem is solved in order to track the motion of the grid points on the material interface and local re-meshing technology is applied to deal with the large-scale deformation of the moving grids. At the same time, the material interface is defined as a kind of grid-deforming boundary to avoid negative grid volumes near the interface. HLLC scheme is used to solve AL E formulations to obtain the resolutions of the whole multi-material fluid domain. Several multi-material modules are computed to indicate that the method in this paper is feasible and successful in tracking the motion state of the material interface. |
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