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

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

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Author: Bourguet, Rémi; Modarres-Sadeghi, Yahya; Karniadakis, George; Triantafyllou, Michael
Publisher: American Physical Society (APS)
Date Issued: 2011-09
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.
URI: http://hdl.handle.net/1721.1/68688
ISSN: 0031-9007
1079-7114
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
Terms of Use: Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Published As: http://dx.doi.org/10.1103/PhysRevLett.107.134502
Journal: Physical Review Letters

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