Un-pairing and pairing mechanisms of cylinders wakes at low Reynolds number

摘要：

The wakes of a circular cylinder and a pair of side-by-side circular cylinders with theReynolds number in the range 60～200 have been investigated experimentally. Some primary spatialdynamics can be concluded as follows. (1) The un-pairing and pairing mechanisms are possessedby the wakes of a circular cylinder and of a pair of side-by-side circular cylinders respectively. (2)Harmonic components are stimulated by both kinds of wakes. In detail, the wakes of a single cylindertake the form m · ff and the ones of a pair of cylinders take the form m · ff/2, where ff denotes thegeneral shedding frequency and m is the natural number. (3) The transitions from the ordered statusto the disordered one of all wakes are characterized by the intermittence of large-scale structures.

关键词： un-pairing and pairing mechanisms chaos analysis cylinder’s wake low Reynolds number

作者: W.W.Ma S.R.Xu A.Yang X.L.Xie

作者单位: Department of Basic Science, Donghua University, Shanghai 200051, China Department of Mechanics and Engineering Science, Fudan University, Shanghai 200433, China

会议类型: 国际会议

会议名称: The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)

会议地点: 上海

会议语种:英文

在线出版日期: 2007-08-15（万方平台首次上网日期，不代表论文的发表时间）