Turbulent jet computations based on MRT and Cascaded Lattice Boltzmann models
Turbulent jet computations based on MRT and Cascaded Lattice Boltzmann models
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DOI：
10.1016/j.camwa.2013.04.013
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发表时间：
2013-08-01
影响因子：
2.9
通讯作者：
Krafczyk, M.
中科院分区：
文献类型：
--
作者：
Geller, S.;Uphoff, S.;Krafczyk, M.
本文对湍流射流进行了数值研究。两个不同的变种的格子玻尔兹曼方法（LBM）的模拟结果进行了比较。第一个是完善的D3Q 19 MRT模型扩展的Smagorinsky大涡模拟（LES）模型。第二种是D3Q27因式级联格子玻尔兹曼（FCLB）模型，没有任何额外的显式湍流模型。对于该模型，目前还没有在非均匀网格上进行高分辨率的湍流研究。底层的计算过程使用时间嵌套细化技术和具有超过十亿自由度的网格。模拟是用并行多物理场求解器VIRTUALFLUIDS进行的。结果表明，这两种模型都是可行的，目前的流动情况下，但FCLB优于传统的方法在某些方面。(C)2013爱思唯尔有限公司保留所有权利。
In this contribution a numerical study of a turbulent jet flow is presented. The simulation results of two different variants of the Lattice Boltzmann method (LBM) are compared. The first is the well-established D3Q 19 MRT model extended by a Smagorinsky Large Eddy Simulation (LES) model. The second is the D3Q27 Factorized Cascaded Lattice Boltzmann (FCLB) model without any additional explicit turbulence model. For this model no studies of turbulent flow with high resolution on nonuniform grids existed so far. The underlying computational procedure uses a time nested refinement technique and a grid with more than a billion DOF. The simulations were conducted with the parallel multi physics solver VIRTUALFLUIDS. It is shown that both models are feasible for the present flow case, but the FCLB outperforms the traditional approach in some aspects. (C) 2013 Elsevier Ltd. All rights reserved.