二维活动网格的Lagrange方法——计算具有多种物质的辐射流体力学方程组的一种方法

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A Two-Dimensional Lagrangian Difference Method of Movable Meshes——A Computing Method for Compressible Radiational Hydrodynamic Equations with Several Materials

摘要: 本文提出了活动网格Lagrange方法.在计算中不要追踪网格边界线,只要计算网格中心的运动,再根据网格中心的位置按一定规则来形成网格的边界线.这样形成的Lagrange网格允许网格间的切向滑移和网格相邻关系的变化.为了改进方法的稳定性和避免网格间的过度的滑移,本文中对网格给出两个速度.

Abstract: In this paper we give the method of movable meshes uhichdonot need to follow surface of cell. This method merely computes the motion of the center of cell. The surface of cell is formed by the center of cell by rule. The Lagrantfian mesh thus formed allows slip between cells and the variety of neighborhood. In order to imporve the stability of the method and avoid unnecessary slips of cell, we give two velocities for the cell.

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