Large-eddy simulation of the flow past both finite and infinite circular cylinders at Re=3900

被引：43

作者：

Zhang Hui ^{[1
]}

Yang Jian-min ^{[1
]}

Xiao Long-fei ^{[1
]}

Lu Hai-ning ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200030, Peoples R China

来源：

JOURNAL OF HYDRODYNAMICS | 2015年 / 27卷 / 02期

基金：

中国国家自然科学基金;

关键词：

large-eddy simulation (LES); circular cylinder; vortex shedding; WAKE;

D O I：

10.1016/S1001-6058(15)60472-3

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The flow past a finite circular cylinder with a height-to-diameter ratio of 1.5 and an infinite circular cylinder of the same diameter at a Reynolds number Re = 3900 is investigated using the large eddy simulation (LES). The objective of the present study is to explore the differences of the flow mechanisms between the finite and infinite circular cylinders. It is shown that the free end of the finite circular cylinders affects the wake region significantly. The mean drag coefficient and the fluctuating lift coefficient of the finite circular cylinder are smaller than those of the infinite circular cylinder. The three-dimensional separation and the separated shear layer instability of the finite circular cylinder can obviously be observed. The existence of an arch vortex in the average flow downstream of the free end is demonstrated.

引用

页码：195 / 203

页数：9

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