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Article: Formation of vortex street and vortex pair from a circular cylinder oscillating in water

TitleFormation of vortex street and vortex pair from a circular cylinder oscillating in water
Authors
KeywordsKeulegan-Carpenter number
Oscillating cylinder
PIV
Issue Date2002
PublisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/etfs
Citation
Experimental Thermal And Fluid Science, 2002, v. 26 n. 8, p. 901-915 How to Cite?
AbstractThe flow around a circular cylinder undergoing sinusoidal oscillating movement in still water is investigated by phase-locked PIV measurements. The pattern and development of large-scale vortex structures in the flow are studied from the velocity vectors and vorticity contours obtained at eight successive phases of an oscillating cycle. Experiments are performed at three Keulegan-Carpenter numbers; KC = 12, 6.28 and 4.25. Results at KC = 12 reveal the mechanism of vortex formation and the development of the shed vortices into a vortex street at a lateral direction to the line of cylinder movement. The role of a biased flow stream and the length of the cylinder stroke in the formation of the vortex street are discussed. At the lower KC numbers, a symmetric pair of vortices is found attached to the leeward face of the cylinder. The vortex pair exhibits an increasing degree of asymmetry when KC increases from 4.25 to 6.28. An explanation in terms of the length of the cylinder strokes and the degree of flow asymmetry is offered for the transition of flow regimes from a vortex pair to a vortex street. The present results are compared with the observations made in previous experimental and numerical studies in the literature. © 2002 Elsevier Science Inc. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/70610
ISSN
2015 Impact Factor: 2.128
2015 SCImago Journal Rankings: 1.389
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLam, KMen_HK
dc.contributor.authorDai, GQen_HK
dc.date.accessioned2010-09-06T06:24:31Z-
dc.date.available2010-09-06T06:24:31Z-
dc.date.issued2002en_HK
dc.identifier.citationExperimental Thermal And Fluid Science, 2002, v. 26 n. 8, p. 901-915en_HK
dc.identifier.issn0894-1777en_HK
dc.identifier.urihttp://hdl.handle.net/10722/70610-
dc.description.abstractThe flow around a circular cylinder undergoing sinusoidal oscillating movement in still water is investigated by phase-locked PIV measurements. The pattern and development of large-scale vortex structures in the flow are studied from the velocity vectors and vorticity contours obtained at eight successive phases of an oscillating cycle. Experiments are performed at three Keulegan-Carpenter numbers; KC = 12, 6.28 and 4.25. Results at KC = 12 reveal the mechanism of vortex formation and the development of the shed vortices into a vortex street at a lateral direction to the line of cylinder movement. The role of a biased flow stream and the length of the cylinder stroke in the formation of the vortex street are discussed. At the lower KC numbers, a symmetric pair of vortices is found attached to the leeward face of the cylinder. The vortex pair exhibits an increasing degree of asymmetry when KC increases from 4.25 to 6.28. An explanation in terms of the length of the cylinder strokes and the degree of flow asymmetry is offered for the transition of flow regimes from a vortex pair to a vortex street. The present results are compared with the observations made in previous experimental and numerical studies in the literature. © 2002 Elsevier Science Inc. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/etfsen_HK
dc.relation.ispartofExperimental Thermal and Fluid Scienceen_HK
dc.rightsExperimental Thermal and Fluid Science. Copyright © Elsevier Inc.en_HK
dc.subjectKeulegan-Carpenter numberen_HK
dc.subjectOscillating cylinderen_HK
dc.subjectPIVen_HK
dc.titleFormation of vortex street and vortex pair from a circular cylinder oscillating in wateren_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0894-1777&volume=26&spage=901&epage=915&date=2002&atitle=Formation+of+vortex+street+and+vortex+pair+from+a+circular+cylinder+oscillating+in+wateren_HK
dc.identifier.emailLam, KM:kmlam@hku.hken_HK
dc.identifier.authorityLam, KM=rp00134en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0894-1777(02)00200-5en_HK
dc.identifier.scopuseid_2-s2.0-0036821586en_HK
dc.identifier.hkuros81992en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036821586&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume26en_HK
dc.identifier.issue8en_HK
dc.identifier.spage901en_HK
dc.identifier.epage915en_HK
dc.identifier.isiWOS:000179348400003-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLam, KM=7403656958en_HK
dc.identifier.scopusauthoridDai, GQ=36070378400en_HK

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