计算物理 ›› 2007, Vol. 24 ›› Issue (2): 159-165.

• 论文 • 上一篇    下一篇

基于黎曼解的移动最小二乘粒子动力学数值方法

胡晓燕1,2, 林忠2, 倪国喜2   

  1. 1. 中国工程物理研究院研究生部, 北京 100088;
    2. 北京应用物理与计算数学研究所, 北京 100088
  • 收稿日期:2005-11-07 修回日期:2006-06-05 出版日期:2007-03-25 发布日期:2007-03-25
  • 作者简介:胡晓燕(1977-)女,河南郑州,博士生,从事计算流体力学方面研究,北京8009信箱17分箱100088.
  • 基金资助:
    国家973(2005CB321700);自然科学基金(10225105);中国工程物理研究院重大基金(2003Z0603)资助项目

Moving Least Squares Particle Hydrodynamics with Riemann Solvers

HU Xiaoyan1,2, LIN Zhong2, NI guoxi2   

  1. 1. Graduate School, China Academy of Engineering Physics, Beijing 100088, China;
    2. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • Received:2005-11-07 Revised:2006-06-05 Online:2007-03-25 Published:2007-03-25

摘要: 叙述移动最小二乘粒子动力学(MLSPH)的基本原理,讨论一维MLSPH计算方法,提出两种不同精度的基于无网格的构造黎曼问题初值的方法.通过黎曼解近似粒子间的相互作用,减小接触间断附近的震荡,并给出多介质一维激波管问题的算例,验证此方法的有效性.

关键词: MLSPH方法, 接触算法, 黎曼解, MUSCL格式

Abstract: The moving least squares particle hydrodynamics (MLSPH) is presented and a 1D MLSPH algorithm is discussed.To reduce oscillations near contact discontinuities,two meshfree Riemann problem initial value methods with different accuracy are introduced.The effect of contact interaction between particles is decreased by the Riemann solver.Efficiency of the method is demonstrated by numerical tests of a 1D shock tube.

Key words: MLSPH method, contact algorithms, Riemann solver, MUSCL scheme

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