无网格方法中的结点分布算法  

A NODE DISTRIBUTION ARITHMETIC IN MESHLESS METHODS

作　　者：仇轶[1] 由长福[1] 祁海鹰[1] 徐旭常[1] 

机构地区：[1]清华大学热能工程系,北京100084

出　　处：《数值计算与计算机应用》2006年第3期176-182,共7页Journal on Numerical Methods and Computer Applications

基　　金：国家自然科学基金(No.50432040)资助.

摘　　要：本文针对无网格法的特点,设计了一种适应于气固两相流直接模拟计算的结点分布算法．该算法在计算域内均匀分布结点,在颗粒周围以辐射状分布结点,并删除其中距离过近以及强烈影响当地结点均匀度的结点．计算表明,该算法在分布结点过程中不需要借助网格,可以直接得到比较理想的结点分布,从而为无网格法应用于气固两相流的直接模拟计算打下坚实的基础．This paper develops an arithmetic which can be applied to direct numerical simulations of the gas-solid two-phase flows in base of characteristics of meshless methods-no meshes and only nodes. In this arithmetic, even nodes are firstly distributed throughout the entire computational domain. Then more nodes around particles are laid out in radial ways along rays beginning from particles＇ centers. Those nodes which are not qualified according to the arithmetic presented in this paper are deleted. The computation shows that this arithmetic can generate an ideal distribution of nodes for simulations by not using any meshes, which is of great importance for meshless methods application in direct numerical simulations of gas-particle flows.

关 键 词：无网格 结点分布算法 气固两相流 直接模拟 非结构化网格 

分 类 号：O35[理学—流体力学]