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Article: Unsteady effluent dispersion in a round jet interacting with an oscillating cross-flow

TitleUnsteady effluent dispersion in a round jet interacting with an oscillating cross-flow
Authors
Issue Date2004
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/hy.html
Citation
Journal of Hydraulic Engineering, 2004, v. 130 n. 7, p. 667-677 How to Cite?
AbstractDispersion of a vertical round jet issuing into an unsteady cross-flow is investigated by laboratory and numerical experiments. An experimental technique has previously been devised to simulate a sinusoidally oscillating cross-flow situation with a nonzero mean flow velocity. The parameters of the cross-flow can be selected with ease. With this experimental technique, 12 cross-flow situations with systematic varying flow parameters are produced. The dispersion pattern of a jet in each cross-flow situation is studied by phase-locked dye visualizations and the dilution level of jet effluent is estimated using image processing. It is found that in a cross-flow of a large unsteadiness parameter, the jet dispersion pattern is significantly different from that of the same jet in a steady cross-flow. The jet effluent is organized into successive large-scale effluent clouds which are connected on the inner side by a bent-over effluent fetch. Specially designed experiments using time-controlled dye ejection are performed to investigate the formation mechanism of the effluent structures. Computational fluid dynamics (CFD) studies are carried out to supplement the experimental concentration data. In addition, the CFD results help to support the formation mechanism of the effluent flow structures and to explore their dynamics. In the time-averaged sense, unsteadiness in the oscillating cross-flow leads to a two- to threefold increase in jet width. The reduction in time-averaged concentration level of jet effluent is not as dramatic because there still remains high concentration of effluent inside the effluent clouds. © ASCE.
Persistent Identifierhttp://hdl.handle.net/10722/150342
ISSN
2015 Impact Factor: 1.284
2015 SCImago Journal Rankings: 0.908
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorXia, LPen_US
dc.contributor.authorLam, KMen_US
dc.date.accessioned2012-06-26T06:03:34Z-
dc.date.available2012-06-26T06:03:34Z-
dc.date.issued2004en_US
dc.identifier.citationJournal of Hydraulic Engineering, 2004, v. 130 n. 7, p. 667-677en_US
dc.identifier.issn0733-9429en_US
dc.identifier.urihttp://hdl.handle.net/10722/150342-
dc.description.abstractDispersion of a vertical round jet issuing into an unsteady cross-flow is investigated by laboratory and numerical experiments. An experimental technique has previously been devised to simulate a sinusoidally oscillating cross-flow situation with a nonzero mean flow velocity. The parameters of the cross-flow can be selected with ease. With this experimental technique, 12 cross-flow situations with systematic varying flow parameters are produced. The dispersion pattern of a jet in each cross-flow situation is studied by phase-locked dye visualizations and the dilution level of jet effluent is estimated using image processing. It is found that in a cross-flow of a large unsteadiness parameter, the jet dispersion pattern is significantly different from that of the same jet in a steady cross-flow. The jet effluent is organized into successive large-scale effluent clouds which are connected on the inner side by a bent-over effluent fetch. Specially designed experiments using time-controlled dye ejection are performed to investigate the formation mechanism of the effluent structures. Computational fluid dynamics (CFD) studies are carried out to supplement the experimental concentration data. In addition, the CFD results help to support the formation mechanism of the effluent flow structures and to explore their dynamics. In the time-averaged sense, unsteadiness in the oscillating cross-flow leads to a two- to threefold increase in jet width. The reduction in time-averaged concentration level of jet effluent is not as dramatic because there still remains high concentration of effluent inside the effluent clouds. © ASCE.en_US
dc.languageengen_US
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/hy.htmlen_US
dc.relation.ispartofJournal of Hydraulic Engineeringen_US
dc.rightsJournal of Hydraulic Engineering. Copyright © American Society of Civil Engineers.-
dc.titleUnsteady effluent dispersion in a round jet interacting with an oscillating cross-flowen_US
dc.typeArticleen_US
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0733-9429&volume=130&issue=7&spage=667&epage=677&date=2004&atitle=Unsteady+effluent+dispersion+of+a+round+jet+interacting+with+an+oscillating+cross-flow-
dc.identifier.emailLam, KM: kmlam@hku.hken_US
dc.identifier.authorityLam, KM=rp00134en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1061/(ASCE)0733-9429(2004)130:7(667)en_US
dc.identifier.scopuseid_2-s2.0-3142708895en_US
dc.identifier.hkuros92996-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-3142708895&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume130en_US
dc.identifier.issue7en_US
dc.identifier.spage667en_US
dc.identifier.epage677en_US
dc.identifier.isiWOS:000222249500009-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridXia, LP=7201955947en_US
dc.identifier.scopusauthoridLam, KM=7403656958en_US

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