Lattice Boltzmann simulations of 2D laminar flows past two tandem cylinders

JOURNAL OF COMPUTATIONAL PHYSICS

卷:228

Article

Mussa, Alberto¹  Asinari, Pietro¹  Luo, Li-Shi^2,3 

[1] Politecn Torino, Dept Energet, I-10129 Turin, Italy

[2] Old Dominion Univ, Dept Math & Stat, Norfolk, VA 23529 USA

[3] Old Dominion Univ, Ctr Comp Sci, Norfolk, VA 23529 USA

关键词: Lattice Boltzmann equation;    Boundary conditions;    Grid stretching;    Flow past tandem cylinders;   

DOI  :  10.1016/j.jcp.2008.10.010

来源: Elsevier

【 摘 要 】

We apply the lattice Boltzmann equation (LBE) with multiple-relaxation-time (MRT) collision model to simulate laminar flows in two-dimensions (2D). In order to simulate flows in an unbounded domain with the LBE method. we need to address two issues: stretched nonuniform mesh and inflow and outflow boundary conditions. We use the interpolated grid stretching method to address the need of non-uniform mesh. We demonstrate that various inflow and outflow boundary conditions call be easily and consistently realized with the MRT-LBE. The MRT-LBE with non-uniform stretched grids is first validated with a number of test cases: the Poiseuille flow, the flow past a cylinder asymmetrically placed in a channel, and the flow past a cylinder in all unbounded domain. We use the LBE method to simulate the flow past two tandem cylinders ill ail unbounded domain with Re = 100. Our results agree well with existing ones. Through this work we demonstrate the effectiveness of the MRT-LBE method with grid stretching. (C) 2008 Elsevier Inc. All rights reserved.

【 授权许可】

Free