Visualization of a mechanism for three-dimensional interaction and near-wall eruption

被引:19
|
作者
Seal, CV [1 ]
Smith, CR [1 ]
机构
[1] Lehigh Univ, Dept Mech Engn & Mech, Bethlehem, PA 18015 USA
关键词
D O I
10.1017/S0022112099005571
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
An experimental configuration has been found which allows detailed observation of three-dimensional vortex-vortex and associated vortex-surface interactions which appear similar to those observed in fully turbulent flow. Hydrogen bubble visualization illustrates a complicated intertwining, or braiding, of two initially co-rotating vortices. It is observed that the three-dimensional interactions of the braided vortices induces a pair of local surface-fluid eruptions reminiscent of the 'bursting' behaviour characteristic of the near-wall regeneration process of fully turbulent boundary layers.
引用
收藏
页码:193 / 203
页数:11
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