The ‘void’ structure in the wake of a self-oscillating flexible circular cylinder

The ‘void’ structure in the wake of a self-oscillating flexible circular cylinder We discuss the experimental vortex wake of a flexible circular cylinder undergoing vortex-induced vibration at low Reynolds number and a large cylinder aspect ratio. Hydrogen bubbles formed on the cylinder track the von Karman vortex cores. They show a characteristic ‘void’ structure. We propose a vortex skeleton model that includes a pinch-off of opposite-signed cores. Voids occurred at a node in streamwise vibration when close to an antinode in transverse cylinder vibration. A vibration model predicts the ratio of shedding frequency to natural cylinder vibration frequency necessary for void formation at specific spanwise locations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

The ‘void’ structure in the wake of a self-oscillating flexible circular cylinder

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Publisher
Springer-Verlag
Copyright
Copyright © 2009 by Springer-Verlag
Subject
Engineering; Engineering Thermodynamics, Heat and Mass Transfer; Fluid- and Aerodynamics; Engineering Fluid Dynamics
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-009-0744-0
Publisher site
See Article on Publisher Site

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