拉格朗日坐标下的三角形网格重分技术

THE REZONING TECHNIQUE OF TRIANGULAR MESH IN THE LAGRANGIAN COORDINATES

拉格朗日坐标下的三角形网格重分技术吴坚，梁珍璇，李荫藩（中国科学院计算中心）ＴＨＥＲＥＺＯＮＩＮＧＴＥＣＨＮＩＱＵＥＯＦＴＲＩＡＮＧＵＬＡＲＭＥＳＨＩＮＴＨＥＬＡＧＲＡＮＧＩＡＮＣＯＯＲＤＩＮＡＴＥＳ￥ＷｕＪｉａｎ；ＬｉａｎｇＺｈｅｎ－ｘｕａｎ；Ｌｉ...

Abstract The major disadvantage of Lagrangian type methods in computational fluid dynamics is the difficulty in treating problems with severely distorted mesh. In this paper, we give an efficient rezoning method in the triangular mesh. It automatically determines the rezoning cycle and the rezoning regions of the severely distortedmesh and fulfills the rezoning process automatically to enable the Lagrangian type method of triangular mesh to treat problems with severe distortion. The method was programmed into the triangular Lagrangian finite volume method code (TLEPFP) for computing the hypervelocity impact problems.