计算物理 ›› 2006, Vol. 23 ›› Issue (4): 419-424.

• 研究论文 • 上一篇    下一篇

无网格方法中粒子分布与自适应研究

倪国喜, 王瑞利, 林忠   

  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
  • 收稿日期:2005-06-13 修回日期:2005-08-31 出版日期:2006-07-25 发布日期:2006-07-25
  • 作者简介:倪国喜(1967-),男,湖北洪湖,副研究员,从事流体力学方面的研究.
  • 基金资助:
    中物院基金(2003Z0603);中物院42105基金资助项目

Adaptive Distribution of Particles in a Meshfree Method

NI Guo-xi, WANG Rui-li, LIN Zhong   

  1. Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • Received:2005-06-13 Revised:2005-08-31 Online:2006-07-25 Published:2006-07-25

摘要: 给出了一种区域粒子的Voronoi面积均匀的划分方法,先利用边界点得到边界粒子,再得到内部粒子,利用这种方法可以得到一般区域上粒子的均匀分布.同时,给出了计算过程中按流场的物理量对粒子进行自适应分布的方法.并给出了几个算例.

关键词: Voronoi面积, 均匀分布, 粒子分布, 自适应

Abstract: A new method to generate a quasi-equal distribution of particles on arbitrary domains is provided. Based on an advancing front mesh generation method, triangles are formed at the boundary. These triangle center-points are used for the boundary condition of the Delaunay mesh generation method which generates inward triangles. All vertices of triangles are the particles in meshfree methods. An adaptive method is given to readjust distribution of particles, according to the gradient of fluid density.

Key words: Voronoi area, boundary point, partical distribution, adaptive

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