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Cross-bispectral analysis of a vibrating cylinder and its wake in low Reynolds number flow

Elgar, Steve and Van Atta, C. W. and Gharib, M. (1990) Cross-bispectral analysis of a vibrating cylinder and its wake in low Reynolds number flow. Journal of Fluids and Structures, 4 (1). pp. 59-71. ISSN 0889-9746. doi:10.1016/0889-9746(90)90043-5.

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Cross-bispectral analysis is used to investigate the coupling between a slender vibrating cylinder and the velocity field in its wake at low Reynolds numbers [Re = O(10^2)]. The velocity field was characterized by a complicated power spectrum, with low frequency peaks as well as upper and lower side band peaks near the primary Strouhal frequency peak and its harmonics. Power spectral and cross-bispectral analyses indicate that the rich structure of the wake velocity power spectra is a direct consequence of the vibrating cylinder. The data suggest the cylinder is coupled to its wake in the sense that the cylinder vibrations introduce motions into the wake at the vibration frequency, and these motions interact nonlinearly within the wake to produce fluctuations at other frequencies. Cross-bispectral analysis isolates the interactions between cylinder vibrations and wake fluctuations.

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Additional Information:© 1990 Academic Press Limited. Received 18 May 1988 and in revised form 8 June 1989. Support was provided by the Office of Naval Research [Grant N00014-86-K-0877 (S.E.)], the National Science Foundation (Grant OCE 85-11290) and the Defense Advanced Research Projects Agency, University Research Initiative Program (C.V.A. and M.G.). Computations were performed at the San Diego Supercomputer Center (supported by the National Science Foundation). We thank the two anonymous referees who provided detailed and helpful reviews of an earlier version of this paper.
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-86-K-0877
NSFOCE 85-11290
Defense Advanced Research Projects Agency (DARPA) University Research Initiative ProgramUNSPECIFIED
Issue or Number:1
Record Number:CaltechAUTHORS:20130918-152602618
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Official Citation:Steve Elgar, C.W. Van Atta, M. Gharib, Cross-bispectral analysis of a vibrating cylinder and its wake in low Reynolds number flow, Journal of Fluids and Structures, Volume 4, Issue 1, January 1990, Pages 59-71, ISSN 0889-9746, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41401
Deposited By: Tony Diaz
Deposited On:18 Sep 2013 22:39
Last Modified:10 Nov 2021 04:29

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