Evaluation of Smagorinsky variants in large-eddy simulations of wall-resolved plane channel flows
Evaluation of Smagorinsky variants in large-eddy simulations of wall-resolved plane channel flows
复制标题
壁分辨平面通道流大涡模拟中 Smagorinsky 变体的评估
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
P. Sagaut
中科院分区：
文献类型：
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作者：
J. Meyers;P. Sagaut
变分多尺度Smagorinsky模式是近年来出现的一种新的大涡模拟模式。一种常见的版本是small-small变体，它使用通过高通滤波分解速度场获得的LES解的小尺度提取来表示Smagorinsky项。该术语的后续小规模提取被用作模型。在本工作中，研究了三种小-小VMS模型在大涡平面通道流动模拟中的应用。基本的小-小配方（模型A）被修改为明确地结合LES滤波器和高通滤波器（模型B）的效果。第三种修改（模型C）是进一步的惯性范围一致，允许使用恒定的模型系数滤波器宽度，它位于有限的雷诺数惯性子范围内。我们的目标是评估这些模型在有墙的情况下的性能。因此，在Reτ= 110,300，…时进行了通道流动模拟。
In recent years, variational multiscale (VMS) Smagorinsky models have emerged as new models for large-eddy simulations (LES). A common version is the small-small variant, which uses a small-scale extraction of the LES solution, obtained by high-pass filtering the resolved velocity field, to express a Smagorinsky term. The subsequent small-scale extraction of this term is used as a model. In the current work, three formulations of the small-small VMS model are investigated in large-eddy simulations of the plane channel flow. The basic small-small formulation (Model A) is modified to explicitly incorporate effects of the LES filter and the high-pass filter (Model B). A third modification (Model C) is further inertial-range consistent, allowing the use of constant model coefficients for filters widths which are situated in a finite Reynolds-number inertial subrange. We aim to evaluate the performance of these models in the presence of walls. Therefore, channel-flow simulations are performed for Reτ=110, 300,...