Vortex dynamics in the cylinder wake

被引:2753
作者
Williamson, CHK
机构
[1] Mechanical and Aerospace Engineering, Upson Hall, Cornell University, Ithaca
关键词
wakes; instability; vortex shedding;
D O I
10.1146/annurev.fl.28.010196.002401
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Since the review of periodic flow phenomena by Berger & Wille (1972) in this journal, over twenty years ago, there has been a surge of activity regarding bluff body wakes. Many of the questions regarding wake vortex dynamics from the earlier review have now been answered in the literature, and perhaps an essential key to our new understandings (and indeed to new questions) has been the recent focus, over the past eight years, on the three-dimensional aspects of nominally two-dimensional wake hows. New techniques in experiment, using laser-induced fluorescence and PIV (Particle-Image-Velocimetry), are vigorously being applied to wakes, but interestingly, several of the new discoveries have come from careful use of classical methods. There is no question that strides forward in understanding of the wake problem are being made possible by ongoing three dimensional direct numerical simulations, as well, as by the surprisingly successful use of analytical modeling in these flows, and by secondary stability analyses. These new developments, and the discoveries of several new phenomena in wakes, are presented in this review.
引用
收藏
页码:477 / 539
页数:63
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