Numerical simulation of the flow around a circular cylinder at high Reynolds numbers
Numerical simulation of the flow around a circular cylinder at high Reynolds numbers
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DOI：
10.1016/s0142-727x(03)00061-4
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发表时间：
2003-08-01
影响因子：
2.6
通讯作者：
Moin, P
中科院分区：
文献类型：
--
作者：
Catalano, P;Wang, M;Moin, P
以超临界状态下圆柱绕流为例，研究了壁面模拟大涡模拟（LES）对高雷诺数复杂湍流流动的适用性和精度。一个简单的壁面应力模型被用来提供LES的近似边界条件。将计算结果与定常和非定常雷诺平均Navier-Stokes（RANS）解及已有的实验数据进行了比较。LES的解决方案被证明是相当准确的RANS结果。它们正确地捕捉到延迟边界层分离和阻力危机后与实验测量一致的减阻系数。在Re-D = 5 x 10（5）和10（6）时，平均压力分布预测得相当好。然而，雷诺数的依赖性是不捕获的，解决方案变得不太准确，在雷诺数增加。(C)2003年爱思唯尔科学公司All rights reserved.
The viability and accuracy of large-eddy simulation (LES) with wall modeling for high Reynolds number complex turbulent flows is investigated by considering the flow around a circular cylinder in the supercritical regime. A simple wall stress model is employed to provide approximate boundary conditions to the LES. The results are compared with those obtained from steady and unsteady Reynolds-averaged Navier-Stokes (RANS) solutions and the available experimental data. The LES solutions are shown to be considerably more accurate than the RANS results. They capture correctly the delayed boundary layer separation and reduced drag coefficients consistent with experimental measurements after the drag crisis. The mean pressure distribution is predicted reasonably well at Re-D = 5 x 10(5) and 10(6). However, the Reynolds number dependence is not captured, and the solution becomes less accurate at increased Reynolds numbers. (C) 2003 Elsevier Science Inc. All rights reserved.