Wake-body Resonance of Long Flexible Structures is Dominated by Counterclockwise Orbits

Author(s)
Modarres-Sadeghi, Yahya; Karniadakis, George E.; Bourguet, Remi; Triantafyllou, Michael S.
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Abstract
We identify a dominant mechanism in the interaction between a slender flexible structure undergoing free vibrations in sheared cross-flow and the vortices forming in its wake: energy is transferred from the fluid to the body under a resonance condition, defined as wake-body frequency synchronization close to a natural frequency of the structure; this condition occurs within a well-defined region of the span, which is dominated by counterclockwise, figure-eight orbits. Clockwise orbits are associated with damping fluid forces.
Date issued
2011-09
URI
http://hdl.handle.net/1721.1/68688
Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Bourguet, Rémi et al. “Wake-body Resonance of Long Flexible Structures is Dominated by Counterclockwise Orbits.” Physical Review Letters 107.13 (2011): n. pag. Web. 27 Jan. 2012. © 2011 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114
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