基于Youngs界面重构技术的自适应网格细分方法  

Adaptive grid subdivision algorithm based on the youngs' interface reconstruction algorithm

作　　者：刘春[1,2] 马天宝[1] 宁建国[1] 

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]北京强度环境研究所,北京100076

出　　处：《计算力学学报》2010年第6期1111-1116,共6页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(10625208)资助项目

摘　　要：Euler型多物质流体动力学数值方法中,常采用Youngs界面重构技术处理混合网格。Youngs方法在输运步中需要同时考虑两种物质,程序编写复杂,效率低。本文在Youngs方法的基础上,对混合网格进行多层细分,用细分后的纯物质子网格代替原混合网格。分析了网格细分的具体方案;对细分后子网格,同时考虑往周边八个网格的输运,给出了所有可能分配量的表达式。最后编程实验结果表明,在不增加计算量的基础上,网格细分的方法有效地提高了计算精度。In multi-material Eulerian hydrody used to deal with mixed grids. Two material namic, Youngs＇ interface reconstruction algorithm is often s have been considered in Youngs＇ algorithm with eomplicated programming and low efficiency. The mixed grids are subdivided based on Youngs＇ algorithm. Pure grids after subdivision will replace mixed grids. After subdivision scheme is analyzed, all of the possible distribution modes to eight neighboring cells are given. The simulation results verify that the grid subdivision algorithm improves precision efficiently without increasing the calculation account.

关 键 词：Youngs算法 细分网格 混合网格 数值模拟 

分 类 号：O389[理学—流体力学]