Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/5280
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dc.contributorDepartment of Mechanical Engineering-
dc.creatorZhang, HJ-
dc.creatorZhou, Y-
dc.creatorAntonia, RA-
dc.date.accessioned2014-12-11T08:29:01Z-
dc.date.available2014-12-11T08:29:01Z-
dc.identifier.issn1070-6631 (print)-
dc.identifier.issn1089-7666 (online)-
dc.identifier.urihttp://hdl.handle.net/10397/5280-
dc.language.isoenen_US
dc.publisherAmerican Institute of Physicsen_US
dc.rights© 2000 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in H. J. Zhang, Y. Zhou & R. A. Antonia, Physics of Fluids 12, 2954 (2000) and may be found at http://link.aip.org/link/?phf/12/2954en_US
dc.subjectVorticesen_US
dc.subjectFlow visualisationen_US
dc.subjectTurbulenceen_US
dc.subjectWakesen_US
dc.subjectProbabilityen_US
dc.titleLongitudinal and spanwise vortical structures in a turbulent near wakeen_US
dc.typeJournal/Magazine Articleen_US
dc.description.otherinformationAuthor name used in this publication: Y. Zhouen_US
dc.identifier.spage2954-
dc.identifier.epage2964-
dc.identifier.volume12-
dc.identifier.issue11-
dc.identifier.doi10.1063/1.1309532-
dcterms.abstractApproximations to the three vorticity components have been simultaneously obtained using a combination of four X wires in the near wake of a circular cylinder with the view of investigating the most likely interrelationship between quasilongitudinal rib-like structures and spanwise vortical structures. The conditional spanwise vorticity variance, based on detections of spanwise structures, shows a strong peak near the detections. This peak suggests a longitudinal extent of 1.0–1.3 cylinder diameters for the spanwise structures. The conditional streamwise vorticity variance has maxima near the saddle points on both sides of the detections, while the conditional lateral vorticity variance is maximum only downstream of the detections. The observations are interpreted in the context of rib-like structures wrapping around consecutive spanwise structures of opposite sign, a scenario which conforms with previous observations based on flow visualizations and direct numerical simulations. The probability density function of vorticity vectors in the plane of mean shear further suggests that the most likely inclination of the rib-like structures to the streamwise direction is about 50°. About 40% of the variances of streamwise and lateral vorticity components is associated with the spanwise vortical structures, apparently resulting from the three dimensionality of these structures; the “remainder” is largely attributed to the rib-like structures. Spanwise structures account for about 60%–80% of the spanwise vorticity variance.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationPhysics of fluids, Nov. 2000, v. 12, no. 11, p. 2954-2964-
dcterms.isPartOfPhysics of fluids-
dcterms.issued2000-11-
dc.identifier.isiWOS:000089656900024-
dc.identifier.scopus2-s2.0-0034326332-
dc.identifier.rosgroupidr04089-
dc.description.ros2000-2001 > Academic research: refereed > Publication in refereed journal-
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_IR/PIRAen_US
dc.description.pubStatusPublisheden_US
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