Instabilities in the wake of a circular disk

被引：22
作者：
Bobinski, T. [1 ,2 ]
Goujon-Durand, S. [2 ]
Wesfreid, J. E. [2 ]
机构：
[1] Warsaw Univ Technol, Inst Aeronaut & Appl Mech, PL-00665 Warsaw, Poland
[2] Univ Paris Diderot, Univ Paris 06, UMR 7636,CNRS,Ecole Super Phys & Chim Ind Ville P, Lab Phys & Mecan Milieux Heterogenes PMMH, F-75005 Paris, France
来源：
PHYSICAL REVIEW E | 2014年 / 89卷 / 05期
关键词：
AXISYMMETRICAL BODIES; VORTEX STRUCTURES; FLOW; STABILITY; VELOCITY; SPHERE;
D O I：
10.1103/PhysRevE.89.053021
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Flow past a disk was investigated experimentally in a low-velocity water channel in the range of intermediate Reynolds numbers. Systematic experiments with flow visualization and particle image velocimetry measurements are presented. Different disks with the aspect ratio chi = d/h varying from 1 to 24 were investigated. The measurements were made in the range of Reynolds numbers from 0 to 500, where stationary and oscillatory instabilities appear. The influence of the aspect ratio on the value of onset instability, the evolution of perturbation, and the obtained vorticity bifurcation branches of the instability were identified.
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页数：8
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