File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Forced convective heat transfer over ribs at various separation

TitleForced convective heat transfer over ribs at various separation
Authors
KeywordsLarge-eddy simulation
Local heat transfer coefficient
Turbulent boundary layer
Dividing streamline
Flow instabilities
Issue Date2012
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijhmt
Citation
International Journal of Heat and Mass Transfer, 2012, v. 55 n. 19-20, p. 5111-5119 How to Cite?
AbstractFlow over transverse ribs is a fundamental problem that has numerous applications in a range of scales from turbine cooling to urban roughness. It can be broadly divided into k-type or d-type flows exhibiting different characteristics. In this study, large-eddy simulation (LES) is used to examine the flows between two ribs at various separation and compare the local heat transfer coefficient (LHTC) on the cavity bottom. Flow instability initiates a dividing streamline at the leeward edge. In k-type flows, it reattaches at the cavity bottom that splits into a leeward recirculation and a windward redeveloping turbulent boundary layer (TBL). Heat removal from the recirculation and the redeveloping TBL is governed by intermittency and entrainment, respectively. Moreover, the dividing streamline impinges on the cavity bottom leading to a local maximum of LHTC. In d-type flows, the dividing streamline covers the cavity isolating the recirculation from the prevailing flow aloft. Heat is therefore solely removed by intermittency in which the LHTC increases monotonically from the leeward to the windward sides. © 2012 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/157200
ISSN
2015 Impact Factor: 2.857
2015 SCImago Journal Rankings: 1.749
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLiu, CHen_US
dc.contributor.authorChung, TNHen_US
dc.date.accessioned2012-08-08T08:45:47Z-
dc.date.available2012-08-08T08:45:47Z-
dc.date.issued2012en_US
dc.identifier.citationInternational Journal of Heat and Mass Transfer, 2012, v. 55 n. 19-20, p. 5111-5119en_US
dc.identifier.issn0017-9310en_US
dc.identifier.urihttp://hdl.handle.net/10722/157200-
dc.description.abstractFlow over transverse ribs is a fundamental problem that has numerous applications in a range of scales from turbine cooling to urban roughness. It can be broadly divided into k-type or d-type flows exhibiting different characteristics. In this study, large-eddy simulation (LES) is used to examine the flows between two ribs at various separation and compare the local heat transfer coefficient (LHTC) on the cavity bottom. Flow instability initiates a dividing streamline at the leeward edge. In k-type flows, it reattaches at the cavity bottom that splits into a leeward recirculation and a windward redeveloping turbulent boundary layer (TBL). Heat removal from the recirculation and the redeveloping TBL is governed by intermittency and entrainment, respectively. Moreover, the dividing streamline impinges on the cavity bottom leading to a local maximum of LHTC. In d-type flows, the dividing streamline covers the cavity isolating the recirculation from the prevailing flow aloft. Heat is therefore solely removed by intermittency in which the LHTC increases monotonically from the leeward to the windward sides. © 2012 Elsevier Ltd. All rights reserved.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ijhmten_US
dc.relation.ispartofInternational Journal of Heat and Mass Transferen_US
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Heat and Mass Transfer. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Heat and Mass Transfer, 2012, v. 55 n. 19-20, p. 5111-5119. DOI: 10.1016/j.ijheatmasstransfer.2012.05.012-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectLarge-eddy simulationen_US
dc.subjectLocal heat transfer coefficienten_US
dc.subjectTurbulent boundary layeren_US
dc.subjectDividing streamline-
dc.subjectFlow instabilities-
dc.titleForced convective heat transfer over ribs at various separationen_US
dc.typeArticleen_US
dc.identifier.emailLiu, CH:chliu@hkucc.hku.hken_US
dc.identifier.authorityLiu, CH=rp00152en_US
dc.description.naturepreprinten_US
dc.identifier.doi10.1016/j.ijheatmasstransfer.2012.05.012en_US
dc.identifier.scopuseid_2-s2.0-84863526348-
dc.identifier.hkuros208066-
dc.identifier.hkuros208069en_US
dc.identifier.volume55-
dc.identifier.issue19-20-
dc.identifier.spage5111-
dc.identifier.epage5119-
dc.identifier.eissn1879-2189-
dc.identifier.isiWOS:000306774400021-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridChung, TNH=55228841800en_US
dc.identifier.scopusauthoridLiu, CH=36065161300en_US
dc.identifier.citeulike10867430-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats