The effect of in-line oscillation on the forces of a cylinder vibrating in a steady flow

Peppa, S; Kaiktsis, L; Triantafyllou, G

dc.contributor.author	Peppa, S	en
dc.contributor.author	Kaiktsis, L	en
dc.contributor.author	Triantafyllou, G	en
dc.date.accessioned	2014-03-01T02:52:46Z
dc.date.available	2014-03-01T02:52:46Z
dc.date.issued	2010	en
dc.identifier.issn	08888116	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36057
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-80054965712&partnerID=40&md5=ae012b9c15a46465faf92e9902d98c3d	en
dc.subject.other	Computational studies	en
dc.subject.other	Fluid forces	en
dc.subject.other	Higher harmonics	en
dc.subject.other	In-line	en
dc.subject.other	In-line oscillations	en
dc.subject.other	Lift force	en
dc.subject.other	Oscillation amplitude	en
dc.subject.other	Time dependence	en
dc.subject.other	Transverse frequency	en
dc.subject.other	Transverse oscillation	en
dc.subject.other	Vibration frequency	en
dc.subject.other	Vortex induced vibration	en
dc.subject.other	Acoustic noise	en
dc.subject.other	Circular cylinders	en
dc.subject.other	Fluid structure interaction	en
dc.subject.other	Fluids	en
dc.subject.other	Oscillating cylinders	en
dc.subject.other	Reynolds number	en
dc.subject.other	Vibrations (mechanical)	en
dc.subject.other	Oscillating flow	en
dc.title	The effect of in-line oscillation on the forces of a cylinder vibrating in a steady flow	en
heal.type	conferenceItem	en
heal.publicationDate	2010	en
heal.abstract	In this paper we present a computational study of the forces acting on a circular cylinder vibrating both transversely and in-line to a uniform stream. The in-line vibration frequency is equal to twice the transverse frequency. The cylinder thus follows a figure-eight trajectory, emulating the trajectory of a free vortex-induced vibration. We consider three values of transverse oscillation frequency, in the regime of the natural frequency of the Kármán street, for a Reynolds number of 400. We find that the fluid forces are greatly influenced by the direction in which the figure-eight is traversed. We also find that the spectrum of the lift force is characterized by the strong presence of odd-numbered higher harmonics. Moreover, depending on the combination of oscillation amplitude and frequency, the lift force exhibits aperiodic time dependence. Copyright © 2010 by ASME.	en
heal.journalName	American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM	en
dc.identifier.volume	3	en
dc.identifier.issue	PARTS A AND B	en
dc.identifier.spage	21	en
dc.identifier.epage	28	en