On the Comparison Between Lattice Boltzmann Methods and Spectral Methods for DNS of Incompressible Turbulent Channel Flows on Small Domain Size

On the Comparison Between Lattice Boltzmann Methods and Spectral Methods for DNS of Incompressible Turbulent Channel Flows on Small Domain Size
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小域尺寸不可压缩湍流通道流DNS的格子Boltzmann方法与谱方法比较

DOI:
10.4208/aamm.2018.s04
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发表时间:
2019-06
影响因子:
1.4
通讯作者:
Xia ZH
Xia ZH
中科院分区:
工程技术3区
文献类型:
--
作者:
Liren Li;Shi YP;Zhang SQ;Wang L-P;Xia ZH

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本文研究了区域尺寸和LBM碰撞模型对充分发展槽道湍流的影响。谱方法的结果表明,较小的区域尺寸将增加流向速度脉动。与谱方法和有限差分方法相比,采用不同碰撞模型的MRT-LBM至少在低阶流统计方面给出了可靠的结果。AMS科目分类:76 F65、76 M28
The paper presents a study of the influence of the domain size and LBM collision models on fully developed turbulent channel flows. The results using spectral method show that a smaller domain size will increase the velocity fluctuations in the streamwise direction. And MRT-LBM with different collision models gives reliable results at least for low order flow statistics compared with those from spectral method and finite-difference method. AMS subject classifications: 76F65, 76M28
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