计算物理 ›› 1997, Vol. 14 ›› Issue (S1): 671-673.

• 论文 • 上一篇    下一篇

格子Boltzmann方法的质量扩散模型

孙成海, 王保国, 沈孟育   

  1. 清华大学工程力学系, 北京 100084
  • 收稿日期:1997-03-20 修回日期:1997-06-09 出版日期:1997-12-25 发布日期:1997-12-25
  • 基金资助:
    国家自然科学基金;国家教委留学回国人员经费资助项目

LATTICE-BOLTZMANN MODELS FOR MASS DIFFUSION

Sun Chenghai, Wang Baoguo, Shen Mengyu   

  1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084
  • Received:1997-03-20 Revised:1997-06-09 Online:1997-12-25 Published:1997-12-25

摘要: 建立了多组份流体、多速度格子Boltzmann模型。该模型满足流体质量扩散方程和运动方程。通过正弦波的衰减过程测量了两流体间的扩散系数。对圆形区域内的静止流体在具有均匀来流速度的另外一种流体中的对流扩散问题进行了数值模拟。

关键词: 格子Boltzmann方法, 质量扩散, 多组份流体, 多速模型

Abstract: A multispecies,multispeeds lattice Boltzmann model is presented to study the mass diffusion properties.The diffusion equations are derived by the Chapman-Enskog method.The one dimensional simulations for the sinusoidal concentration distributions are compared with the theoretical results,showing good agreement.The numerical simulations for 2-D convection diffusion problems are also presented.

Key words: Lattice Boltzmann, mass diffusion, multi-species, multi-speeds

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