Evaluation of Detached Eddy Simulations for predicting the flow over periodic hills
Evaluation of Detached Eddy Simulations for predicting the flow over periodic hills
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DOI：
10.1051/proc:2007016
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发表时间：
2007
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影响因子：
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通讯作者：
S. Šarić;S. Jakirlic;M. Breuer;B. Jaffrézic;G. Deng;Oussama Chikhaoui;J. Fröhlich;D. Terzi;M. Manhart;Nikolaus Peller
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文献类型：
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作者：
S. Šarić;S. Jakirlic;M. Breuer;B. Jaffrézic;G. Deng;Oussama Chikhaoui;J. Fröhlich;D. Terzi;M. Manhart;Nikolaus Peller
一个混合LES-RANS策略，分离涡模拟（DES），作为一个预测工具的大规模分离的湍流通道流的性能进行了仔细检查。这是在一个合作的努力，涉及五个不同的组使用的五个不同的流求解器，以涵盖广泛的数值方法和实现。本文集中在DES的计算网格约一百万细胞获得的结果。的结果进行比较，通过大涡模拟（LES）使用标准和动态Smagorinsky模型和一个替代的混合LES-RANS -所有计算在同一个网格上。使用高分辨率LES（大约1300万个细胞）的数据作为参考。此外，分辨率的影响，因此，LES-RANS接口的位置进行了研究。
The performance of an hybrid LES–RANS strategy, the Detached Eddy Simulation (DES), as a predictive tool for turbulent channel flow with massive separation is scrutinized. This is undertaken in a collaborative effort involving five different flow solvers used by five different groups to cover a broad range of numerical methods and implementations. This paper concentrates on DES results obtained with a computational mesh of approximately one million cells. The results are compared to those obtained by Large Eddy Simulations (LES) using the standard and the dynamic Smagorinsky models and an alternative hybrid LES–RANS – all computed on the same grid. Data of a highly resolved LES (roughly 13 million cells) are used for reference. Furthermore, the impact of resolution and, therefore, the location of the LES–RANS interface is studied.