On the formation of the chain of ring-like vortices in a transitional boundary layer |
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Authors: | C B Lee S Fu |
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Institution: | (1) Laboratory of Fluid Mechanics Department of Engineering Mechanics Tsinghua University, Beijing 100084, P.R. China, CN;(2) State Key Laboratory for Turbulence Research of Peking University, Beijing 100871, P.R. China, CN |
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Abstract: | One mechanism by which laminar flow becomes turbulence is through the instability of vortex interaction. The nonlinear evolution
of the interactions between the Λ-vortex and the secondary closed vortex has been investigated. This nonlinear instability
process leads to some fundamental changes in the topology of flows. Experimental observations are presented here showing the
formation of a chain of ring-like vortices, which generate high-frequency spikes on time traces in a transitional boundary
layer.
Received: 13 March 2000/Accepted: 5 July 2000 |
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Keywords: | |
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