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Article: Analysis on multiplicity and stability of convective heat transfer in tightly curved rectangular ducts

TitleAnalysis on multiplicity and stability of convective heat transfer in tightly curved rectangular ducts
Authors
KeywordsCurved duct
Forced convection
Hilbert spectral analysis
Multiplicity
Stability
Issue Date2009
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijhmt
Citation
International Journal Of Heat And Mass Transfer, 2009, v. 52 n. 25-26, p. 5849-5866 How to Cite?
AbstractThe present work is on bifurcation and stability of fully-developed forced convection in a tightly curved rectangular duct. Seven symmetric and four asymmetric solution branches were found. The physical mechanism and driving forces for generating various flow structures are discussed. The flow stability on various branches is determined by direct transient computation on dynamic responses of the multiple solutions. As Dean number increases, finite random disturbances lead the flows from a stable steady state to another stable steady state, a periodic oscillation, an intermittent oscillation, another periodic oscillation and a chaotic oscillation. The features of flow oscillations are examined by Hilbert spectral analysis. The mean friction factor and the mean Nusselt number are obtained for all physically-realizable flows. A significant enhancement of heat transfer can be achieved at the expense of a slight increase of flow friction. © 2009 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/124888
ISSN
2015 Impact Factor: 2.857
2015 SCImago Journal Rankings: 1.749
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of Hong KongGRF7049/06P
Funding Information:

Authors are indebted to Dr. T.L. Yang for his discussion on numerical methods and computer code. The financial support from the Research Grants Council of Hong Kong (GRF7049/06P) to LW. is gratefully acknowledged.

References

 

DC FieldValueLanguage
dc.contributor.authorLiu, Fen_HK
dc.contributor.authorWang, Len_HK
dc.date.accessioned2010-10-31T10:59:41Z-
dc.date.available2010-10-31T10:59:41Z-
dc.date.issued2009en_HK
dc.identifier.citationInternational Journal Of Heat And Mass Transfer, 2009, v. 52 n. 25-26, p. 5849-5866en_HK
dc.identifier.issn0017-9310en_HK
dc.identifier.urihttp://hdl.handle.net/10722/124888-
dc.description.abstractThe present work is on bifurcation and stability of fully-developed forced convection in a tightly curved rectangular duct. Seven symmetric and four asymmetric solution branches were found. The physical mechanism and driving forces for generating various flow structures are discussed. The flow stability on various branches is determined by direct transient computation on dynamic responses of the multiple solutions. As Dean number increases, finite random disturbances lead the flows from a stable steady state to another stable steady state, a periodic oscillation, an intermittent oscillation, another periodic oscillation and a chaotic oscillation. The features of flow oscillations are examined by Hilbert spectral analysis. The mean friction factor and the mean Nusselt number are obtained for all physically-realizable flows. A significant enhancement of heat transfer can be achieved at the expense of a slight increase of flow friction. © 2009 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijhmten_HK
dc.relation.ispartofInternational Journal of Heat and Mass Transferen_HK
dc.subjectCurved ducten_HK
dc.subjectForced convectionen_HK
dc.subjectHilbert spectral analysisen_HK
dc.subjectMultiplicityen_HK
dc.subjectStabilityen_HK
dc.titleAnalysis on multiplicity and stability of convective heat transfer in tightly curved rectangular ductsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0017-9310&volume=52&issue=25-26&spage=5849&epage=5866&date=2009&atitle=Analysis+on+multiplicity+and+stability+of+convective+heat+transfer+in+tightly+curved+rectangular+ductsen_HK
dc.identifier.emailWang, L:lqwang@hkucc.hku.hken_HK
dc.identifier.authorityWang, L=rp00184en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ijheatmasstransfer.2009.07.019en_HK
dc.identifier.scopuseid_2-s2.0-77951555108en_HK
dc.identifier.hkuros174468en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77951555108&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume52en_HK
dc.identifier.issue25-26en_HK
dc.identifier.spage5849en_HK
dc.identifier.epage5866en_HK
dc.identifier.isiWOS:000271711200021-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLiu, F=36937966600en_HK
dc.identifier.scopusauthoridWang, L=35235288500en_HK
dc.identifier.citeulike5827379-

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