Galilean invariant fluid-solid interfacial dynamics in lattice Boltzmann simulations

JOURNAL OF COMPUTATIONAL PHYSICS

卷:266

Article

Wen, Binghai^1,2  Zhang, Chaoying²  Tu, Yusong³  Wang, Chunlei¹  Fang, Haiping¹ 

[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[2] Guangxi Normal Univ, Coll Comp Sci & Informat Engn, Guilin 541004, Peoples R China

[3] Shanghai Univ, Inst Syst Biol, Shanghai 200444, Peoples R China

关键词: Computational fluid dynamics;    Lattice Boltzmann method;    Momentum exchange method;    Galilean Invariance;    Computational accuracy;   

DOI  :  10.1016/j.jcp.2014.02.018

来源: Elsevier

【 摘 要 】

Galilean invariance is a fundamental property; however, although the dynamics of lattice Boltzmann equation in the hydrodynamic limit is Galilean invariant, this property is usually not taken into account in the treatment of the fluid-solid interface. Here, we show that consideration of Galilean invariance in fluid-solid interfacial dynamics can greatly enhance the computational accuracy and robustness in a numerical simulation. Surprisingly, simulations are so vastly improved that the force fluctuation is very small and a time average becomes unnecessary. (C) 2014 Elsevier Inc. All rights reserved.

【 授权许可】

Free