Simplified lattice Boltzmann method on multi-resolution mesh

被引:0
|
作者
He, Zheng-Wei [1 ,2 ]
Shu, Chang [3 ]
Chen, Zhen [1 ,2 ]
机构
[1] State Key Lab Ocean Engn, Marine Numer Expt Ctr, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Ocean & Civil Engn, Shanghai 200240, Peoples R China
[3] Natl Univ Singapore, Dept Mech Engn, 10 Kent Ridge Crescent, Singapore 119260, Singapore
基金
中国国家自然科学基金;
关键词
EQUATION; VELOCITY; PROGRESS;
D O I
10.1063/5.0227637
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The simplified lattice Boltzmann method (SLBM), as a recent advancement in the lattice Boltzmann community, alleviates the intrinsic limitations of the standard lattice Boltzmann method by directly evolving macroscopic properties and nicely preserving numerical stability in high-Reynolds-number simulations. To enhance its capability of handling complex hydrodynamic/acoustic problems and to reduce computational efforts, an improved version of SLBM, which is applicable on multi-resolution mesh, is developed in this article. In this method, smooth transition of physical properties across the interface of meshes with different resolutions is ensured by a novel numerical strategy, which effectively couples the interpolation and the extrapolation algorithms. In the meantime, a rescaling algorithm is proposed to fix the inconsistency of time levels induced by the usage of multi-resolution mesh. Comprehensive evaluations of the accuracy, efficiency, and stability of the new method are carried out through benchmark tests of both hydrodynamic and acoustic problems.
引用
收藏
页数:18
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