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用于可压缩Navier-Stokes方程的多速度级与多能级

张建影, 闫广武   

  1. 吉林大学 数学学院, 长春 130012
  • 收稿日期:2006-06-13 修回日期:1900-01-01 出版日期:2006-09-26 发布日期:2006-09-26
  • 通讯作者: 闫广武

A Multispeedlevel and Multienergylevel Lattice Boltzmann Model for Compressible Navier-Stokes Equations

ZHANG Jianying, YAN Guangwu   

  1. College of Mathematics, Jilin University, Changchun 130012, China
  • Received:2006-06-13 Revised:1900-01-01 Online:2006-09-26 Published:2006-09-26
  • Contact: YAN Guangwu

摘要: 构造了用于可压缩NavierStokes方程的25bit格子Boltzmann模型, 它具有3个速度级和3个能级. 令其局部平衡态分布函数具有质量、 动量和能量守恒, 同时假设平衡态分布函数满足高阶矩条件, 得到了具有二阶截断误差的可压缩NavierStokes方程. 数值模拟表明, 所得结果比一阶模型的结果有较高的精度与分辨率.

关键词: 格子Boltzmann方法, 可压缩NavierStokes方程, Sod问题, 多能级格子Boltzmann模型

Abstract: We proposed a 25bit lattice Boltzmann model for the compressible NavierStokes equations. It is based on threespeedlevel and threeenergylevel. We used the conservation laws of the mass, momentum and energy, and the method of higher moments of the equilibrium distribution functions to get the compressible NavierStokes equations with the second accuracy of the truncation errors. The numerical result shows the model has a higher accuracy and resolution than the first accuracy model.

Key words: lattice Boltzmann method, compressible NavierStoke s equation, Sod problem, multienergylevel lattice Boltzmann model

中图分类号: 

  • O354