Path instability of a rising bubble

被引：267
|
作者：
Mougin, G [1 ]
Magnaudet, J [1 ]
机构：
[1] UPS, INPT, Inst Mecan Fluides Toulouse, CNRS,UMR 5502, F-31400 Toulouse, France
来源：
PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.88.014502
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We model the problem of path instability of a rising bubble by considering the bubble as a spheroidal body of fixed shape, and we solve numerically the coupled fluid-body problem. Numerical results show that this model exhibits path instability for large enough values of the control parameters. The corresponding characteristics of the zigzag and spiral paths are in good agreement with experimental observations. Analysis of the vorticity field behind the bubble reveals that a wake instability leading to a double threaded wake is the primary cause of the path instability.
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页数：4
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