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APS » Journals » Phys. Rev. Lett. » Volume 99 » Issue 14
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Phys. Rev. Lett. 99, 144503 (2007) [4 pages]

Resonant Vibrations of Bluff Bodies Cause Multivortex Shedding and High Frequency Forces

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J. M. Dahl*, F. S. Hover, and M. S. Triantafyllou
Massachusetts Institute of Technology, Department of Mechanical Engineering, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA

S. Dong
Purdue University, Department of Mathematics, 150 N. University Street, West Lafayette, Indiana 47907, USA

G. E. Karniadakis
Brown University, Division of Applied Mathematics, 182 George Street, Providence, Rhode Island 02912, USA

Received 9 January 2007; published 5 October 2007

A flexibly mounted circular cylinder in cross-flow, with natural frequencies in the inline and transverse directions having a ratio close to 2∶1, exhibits drastic changes in the vortex structures in its wake, the frequency content of the fluid forces, and the orbital shape of its resulting motions. Stable multivortex patterns form in the cylinder wake, associated with large high-frequency force components.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.144503
DOI:
10.1103/PhysRevLett.99.144503
PACS:
47.32.ck, 47.27.ek, 47.54.De

*jdahl@mit.edu

 
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