Reduction of the Loads on a Cylinder Undergoing Harmonic In-Line Motion

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dc.contributorVirginia Techen
dc.contributor.authorMarzouk, O. A.en
dc.contributor.authorNayfeh, Ali H.en
dc.contributor.departmentBiomedical Engineering and Mechanicsen
dc.date.accessed2014-04-04en
dc.date.accessioned2014-04-24T18:34:17Zen
dc.date.available2014-04-24T18:34:17Zen
dc.date.issued2009-08-01en
dc.description.abstractWe use the finite-difference computational fluid dynamics method to study in detail the flow field around a circular cylinder in a uniform stream while undergoing in-line harmonic motion. For a given motion amplitude, there exists a critical forcing frequency below which the lift and drag can be period-n, quasiperiodic, or chaotic. Similarly, for a given frequency, there exists a critical amplitude below which the lift and drag can be period-n, quasiperiodic, or chaotic. Above these critical conditions, the lift and drag are synchronous with the forcing. The lift nearly vanishes and the mean drag drops and saturates at a value that is independent of the driving frequency, whereas the oscillatory drag quadratically depends on it. We relate these features to changes in the wake and the surface-pressure distribution. We examine the influence of the Reynolds number on these critical frequency and amplitude. Second- and higher-order spectral analyses show remarkable changes in the linear and quadratic coupling between the lift and drag when synchronization takes place; it destroys the two-to-one coupling between them in the cases of no motion and synchronization due to cross-flow motion. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3210774]en
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMarzouk, Osama A.; Nayfeh, Ali H., "reduction of the loads on a cylinder undergoing harmonic in-line motion," Phys. Fluids 21, 083103 (2009); http://dx.doi.org/10.1063/1.3210774en
dc.identifier.doihttps://doi.org/10.1063/1.3210774en
dc.identifier.issn1070-6631en
dc.identifier.urihttp://hdl.handle.net/10919/47649en
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/pof2/21/8/10.1063/1.3210774en
dc.language.isoen_USen
dc.publisherAIP Publishingen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectVortex-induced vibrationen
dc.subjectCircular-cylinderen
dc.subjectOscillating cylinderen
dc.subjectFlowen
dc.subjectStructureen
dc.subjectUniform-flowen
dc.subjectWakeen
dc.subjectIncidentsen
dc.titleReduction of the Loads on a Cylinder Undergoing Harmonic In-Line Motionen
dc.title.serialPhysics of Fluidsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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