计算物理 ›› 2001, Vol. 18 ›› Issue (5): 407-411.

• 论文 • 上一篇    下一篇

一个完全守恒的格子Boltzmann模型

冯士德, 任荣彩, 毛江玉   

  1. 中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室, 北京 100029
  • 收稿日期:2000-12-29 修回日期:2001-04-06 出版日期:2001-09-25 发布日期:2001-09-25
  • 作者简介:冯士德(1959-),男,辽宁,副研,博士,从事计算流体力学方面的研究.
  • 基金资助:
    LASG优秀国家重点实验室基金(49823002);教育部留学回国人员启动基金(4200060);中国科学院留学经费择优支持回国工作基金(7200053;81502)资助项目

THE LATTICE BOLTZMANN MODEL OF A COMPLETE CONSERVATION FORM

FENG Shi-de, REN Rong-cai, MAO Jiang-yu   

  1. State Key Laboratory of Numerical Modelling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, P R China
  • Received:2000-12-29 Revised:2001-04-06 Online:2001-09-25 Published:2001-09-25

摘要: 利用六角形格子离散的方法,使得每个六角形Cell里含有 3种不同运动速度的粒子微团,宏观物理量用这些粒子微团的矩来定义.根据微观和宏观之间的质量、动量、能量守恒准则,建立了一个二维的D2Q19格子Boltzmann模型,从该D2Q19模型出发可推导出宏观的流体力学方程组.用该模型对冲击波在障碍物组表面上的折射现象进行数值模拟,并将计算结果与实验进行了比较.

关键词: Boltzmann模型, 分布函数, 冲击波, 流体力学方程

Abstract: Three kinds of particle granules are included in each hexagonal cell using a discrete method of hexagonal lattice,and macroscopic quantities are defined by the moment of particle granules.Two-dimensional D2Q19-lattice Boltzmann model has been developed by the conservation laws of mass,momentum and energy,and the hydrodynamic equations can be derived from the model.The shock wave reflection phenomena on the surface of obstacles have been simulated using the model.

Key words: Boltzmann model, distribution function, shock waves, hydrodynamic equations

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