Published October 2, 1989
| public
Journal Article
Bispectral analysis of ordered and chaotic vortex shedding from vibrating cylinders at low Reynolds numbers
- Creators
- Elgar, Steve
- Van Atta, C. W.
-
Gharib, M.
Abstract
Bispectral analysis is used to compare and contrast ordered and chaotic vortex shedding from a cylinder in low-Reynolds-number flow. Auto-bicoherence spectra of the wake velocity field for ordered shedding are characterized by sharp peaks, indicating coupling between fluid motions at the vortex shedding frequency, its side bands, and its harmonics. Wake velocities for chaotic shedding have broad power spectral peaks and substantial low-frequency energy. The corresponding auto-bicoherences show coupling between motions with a relatively wide range of frequencies, especially low frequencies.
Additional Information
© 1989 Elsevier Science Publishers B.V. Received 1 April 1988; Accepted 3 June 1989; Communicated by A.C. Newell. Support was provided by the Office of Naval Research Grant N00014-86-K-0877 (S.E.) and by the National Science Foundation Grant OCE85-11290 and the Defense Advanced Research Projects Agency University Research Initiative Program (C.V.A. and M.G.). Computations were performed on the CRAY XMP at the San Diego Supercomputer Center (supported by NSF) through an allocation provided by Center.Additional details
- Eprint ID
- 41404
- DOI
- 10.1016/0167-2789(89)90010-9
- Resolver ID
- CaltechAUTHORS:20130918-154846323
- N00014-86-K-0877
- Office of Naval Research (ONR)
- OCE85-11290
- NSF
- Defense Advanced Research Projects Agency (DARPA) University Research Initiative Program
- Created
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2013-09-18Created from EPrint's datestamp field
- Updated
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2023-03-14Created from EPrint's last_modified field
- Caltech groups
- GALCIT