非结构子网格压力方法

计算物理 ›› 2007, Vol. 24 ›› Issue (5): 526-532.

非结构子网格压力方法

葛全文, 林忠, 王瑞利

北京应用物理与计算数学研究所, 北京 100088

收稿日期:2006-03-14 修回日期:2006-08-09 出版日期:2007-09-25 发布日期:2007-09-25
作者简介:葛全文(1960-),男,吉林前郭,副研究员,博士,从事计算教学及其应用软件研究.
基金资助:
中物院基金(20050651)资助项目

Unstructured Subzonal Pressure Method

GE Quanwen, LIN Zhong, WANG Ruili

Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

Received:2006-03-14 Revised:2006-08-09 Online:2007-09-25 Published:2007-09-25

摘要/Abstract

摘要： 纯拉氏流体力学计算失败的根源是砂漏运动和虚假涡旋,运用子网格拉氏质量与其相关的子网格密度得到子网格压力,子网格压力产生的扰动隅角力能消除这些虚假运动,以便消除困扰拉氏流体力学算法的网格畸变带来的数值计算困难.将包括子网格压力的相容流体算法推广到非结构网格,研制包括非结构子网格压力的相容流体程序,对Saltzman活塞问题进行数值模拟,从数值结果分析可知,非结构子网格压力方法能抑制虚假涡旋,消除砂漏畸变.

关键词: 隅角力, 非结构子网格压力, 砂漏畸变

Abstract: The subzonal pressure is obtained with subzonal Lagranian masses and corresponding densities. It results in subzonal corner forces and eliminates hourglass motion and spurious vorticity.We extend the compatible Lagranian hydrodynamics algorithm including subzonal pressures to unstructured zone and develope the code.Numerical examples of Saltzman piston demonstraste that this algorithm captures shock discontinuity,eliminates hourglass motion and restraines spurious vorticity accuratly and efficiently.

Key words: corner force, unstructured subzonal pressure, hourglass motion

中图分类号:

O241.82

葛全文, 林忠, 王瑞利. 非结构子网格压力方法[J]. 计算物理, 2007, 24(5): 526-532.

GE Quanwen, LIN Zhong, WANG Ruili. Unstructured Subzonal Pressure Method[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2007, 24(5): 526-532.