A lattice-Boltzmann method with hierarchically refined meshes
A lattice-Boltzmann method with hierarchically refined meshes
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DOI：
10.1016/j.compfluid.2013.01.013
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发表时间：
2013-04-20
影响因子：
2.8
通讯作者：
Schroeder, W.
中科院分区：
文献类型：
--
作者：
Eitel-Amor, G.;Meinke, M.;Schroeder, W.
提出了一种采用单元中心格结构的局部分层自适应网格细化的格子-玻尔兹曼方法（LBM），满足高精度和高效率的要求。它应用于圆柱体和球体上的二维和三维层流和湍流，构成了针对此类钝体问题的 LB 方法的综合验证。在湍流流态中，使用大涡模拟来捕获高达惯性子范围的流动物理场。详细描述了数值方法，并通过考虑雷诺数 Re = 20、40 和 100 时圆柱体周围的流动以及 Re = 100、300、3700 和 10,000 时经过球体的流动来证明该方法的准确性。 LBM 加上局部分层网格细化可产生准确的时间和空间结果，并通过全局减少单元数量来显着提高计算效率。 (C) 2013 Elsevier Ltd. 保留所有权利。
A lattice-Boltzmann method (LBM) with local hierarchical adaptive grid refinement using a cell-centered lattice structure is presented which satisfies the requirements of high accuracy and high efficiency. It is applied to two-dimensional and three-dimensional laminar and turbulent flows over cylinders and spheres which constitute a comprehensive validation of LB methods for such blunt body problems. In the turbulent flow regime, a large-eddy simulation is used to capture the flow physics up to the inertial subrange. The numerical approach is described in detail and the accuracy of the method is demonstrated by considering the flow around a circular cylinder at Reynolds numbers Re = 20, 40, and 100 and the flow past a sphere at Re = 100, 300, 3700, and 10,000. The LBM plus local hierarchical grid refinement yields accurate temporal and spatial results and dramatically increases the computational efficiency by globally reducing the number of cells. (C) 2013 Elsevier Ltd. All rights reserved.