计算物理 ›› 2001, Vol. 18 ›› Issue (2): 163-169.

• 论文 • 上一篇    下一篇

三维流体界面不稳定性的Ghost方法

唐维军1, 张景琳1, 李晓林2, 赵宁3   

  1. 1. 北京应用物理与计算数学研究所, 计算物理实验室, 北京 100088;
    2. Department of Appiied Mathematics and Statistics, SUNY at Stony Brook, Stony Brook 11794;
    3. 南京航空航天大学, 江苏 南京 210016
  • 收稿日期:1999-09-24 修回日期:2000-06-07 出版日期:2001-03-25 发布日期:2001-03-25
  • 作者简介:唐维军(1965-),男,湖南湘潭,副研究员,博士,从事计算数学及计算流体力学等方面的研究.
  • 基金资助:
    国家自然科学基金(19932010);计算物理国防科技重点实验室试点基金(2000JS76.3.IZS7601)及中国工程物理研究院院外基金资助项目

THE GHOST METHOD FOR FLUID INTERFACE INSTABILITY IN 3D

TANG Wei-jun1, ZHANG Jing-lin1, LI Xiao-lin2, ZHAO Ning3   

  1. 1. Laboratory of Computational Physics, The Institute of Applied Physics and Computational Mathematics, Beijing 100088, P R China;
    2. Department of Applied Mathematics and Statistics, SUNY at Stony Brook, Stony Brook 11794, U S A;
    3. Nanjing Uniuersity of Aeronautics and Astronautics, Nanjing 210016, P R China
  • Received:1999-09-24 Revised:2000-06-07 Online:2001-03-25 Published:2001-03-25

摘要: Euler方法对大多数气体流动处理得很好,但在临近材料界面的区域出现非物理振荡.Lagarange方法对多材料界面适用性很好,但它在处理大变形和大多数气体流动的涡结构却有自身的困难.理想的稳定性强的方法是结合两种方法的长处.利用Level Set方法来确定界面位置,利用Ghost方法来确定临近界面的网格点的状态量.采用单侧界面的熵插值技巧来捕捉适宜的界面边界条件,并与TVD/AC格式进行了数值比较.

关键词: 界面不稳定性, Level Set方法, TVD格式, TVD/AC格式, Ghost方法

Abstract: It uses a Level Set function to track the motion of a fluid interface in an Eulerian framework.In addition,the use of Ghost cells (actually Ghost nodes in the difference framework) can keep the density profile from smearing out,while still preserving the scheme robust 2-nd easy to program with and accuracy TVD scheme in spacial and two step Runge Kutta methods.In contrast, the references[6][7] allow the density profile smearing out.This method significantly improves the resolution at the contact discontinuity.

Key words: interface instability, Level Set method, TVD, TVD/AC, Ghost method

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