摘要
ＬＢＧＫ方法在保留了格子气模型的一些优点的同时，克服了格子气模型的不足之处．应用ＬＢＧＫ方法，可以对更复杂的流体进行模拟．本文讨论了一种九点ＬＢＧＫ模型，并用Ｃｈａｐｍａｎ－Ｅｎｓｋｏｇ展开方法和多尺度技术证明其在二阶精度上表现为标准的Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程．用该模型对圆柱绕流和管排流动进行模拟的结果显示，该模型能较好地模拟复杂流动现象，并具有一定工程应用背景．
Lattice Boltzmann (LB) method, which was developed from Lattice gas (LA) method,maintain some advantage of its parents, and overcome the main shortcoming of the LA. It ismore efficient to simulate the complex fluid flow by LB method. In this paper, a 9-bit squaremodel of Lattice Boltzmann, from which the Navier-Stokes equation can be derived usingChapman-Enskog expansion, is presented. Using this model, the flow around a cylinder andflow through the bank of tubes were simulated. The results show that LB method is efficientto simulate the behavior of complex fluid and valuable engineering.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
1999年第6期764-768,共5页
Journal of Engineering Thermophysics
基金
国家自然科学基金
关键词
LBGK
N-S方程
数值计算
管排
圆柱绕流
Lattice Boltzmann, Navier-Stokers equation, numerical simulating, thebank of tubes, flow around cylinder
