Experimental and numerical studies of the flow over a circular cylinder at Reynolds number 3900
Experimental and numerical studies of the flow over a circular cylinder at Reynolds number 3900
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DOI：
10.1063/1.2957018
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发表时间：
2008-08
影响因子：
4.6
通讯作者：
P. Parnaudeau;J. Carlier;D. Heitz;E. Lamballais
中科院分区：
文献类型：
--
作者：
P. Parnaudeau;J. Carlier;D. Heitz;E. Lamballais
本文的工作有助于雷诺数Re=3900时圆柱绕流的研究。虽然这种经典流动在文献中有广泛的记载，特别是对于导致亚临界流态的精确雷诺数，但对于障碍物后面的湍流统计数据没有达成共识。在这里，流动进行了研究，数值模拟与大涡模拟和实验与热线风速仪和粒子图像测速仪。数值模拟使用高阶格式和特定的浸入边界方法。本研究的重点是湍流统计和功率谱在近尾流到十个直径。统计估计需要大量的积分时间，增加计算成本，并导致在这项研究中考虑的大多数流量特性的不确定性约为10%。本文的数值计算和实验结果与已有的大涡模拟结果吻合较好。
This work contributes to the study of flow over a circular cylinder at Reynolds number Re=3900. Although this classical flow is widely documented in the literature, especially for this precise Reynolds number that leads to a subcritical flow regime, there is no consensus about the turbulence statistics immediately just behind the obstacle. Here, the flow is investigated both numerically with large eddy simulation and experimentally with hot-wire anemometry and particle image velocimetry. The numerical simulation is performed using high-order schemes and a specific immersed boundary method. The present study focuses on turbulence statistics and power spectra in the near wake up to ten diameters. Statistical estimation is shown to need large integration times increasing the computational cost and leading to an uncertainty of about 10% for most flow characteristics considered in this study. The present numerical and experimental results are found to be in good agreement with previous large eddy simulation da...