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Article: Wind-induced natural ventilation of re-entrant bays in a high-rise building

TitleWind-induced natural ventilation of re-entrant bays in a high-rise building
Authors
KeywordsCFD simulations
High-rise building
Micro-climate
Natural ventilation
Pollutant dispersion
Re-entrant bays
Wind-structure interaction
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jweia
Citation
Journal Of Wind Engineering And Industrial Aerodynamics, 2011, v. 99 n. 2-3, p. 79-90 How to Cite?
AbstractThis paper reports a systematic computational study of wind-induced natural ventilation and pollutant transport of re-entrant bays on a total of 30 generic building models of different building heights and with bays of different dimensions. Mean wind flow around each building model and wind-induced flow inside re-entrant bays are computed. To determine the ventilation efficiency of the bay, the computed flow field is used to disperse a scalar pollutant initially occupying the entire bay at a uniform concentration. The subsequent time decay of pollutant concentration inside the bay is studied and the ventilation efficiency is quantified by the retention time. The results show that wind-induced flow inside the bay, especially on the building side face, is complex and highly three-dimensional. Air exchange rates through the roof opening and vertical side opening are analyzed for each bay and their relationship to the ventilation efficiency is discussed. The bays on the building side faces are much worse ventilated than those on the windward or leeward building face. The deeper the side bay, the worse is the air exchange and ventilation. The building height is found to have a governing effect on the ventilation of the windward and leeward re-entrant bays. © 2010 Elsevier Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/137246
ISSN
2015 Impact Factor: 2.024
2015 SCImago Journal Rankings: 1.097
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of Hong KongHKU/713507
centre of Applied Computing and Interactive Media, City University of Hong Kong
Funding Information:

This investigation was supported by a Grant awarded by the Research Grants Council of Hong Kong (HKU/713507). The CFD resource is partially supported by the centre of Applied Computing and Interactive Media, City University of Hong Kong.

References

 

DC FieldValueLanguage
dc.contributor.authorCheng, CKCen_HK
dc.contributor.authorLam, KMen_HK
dc.contributor.authorLeung, YTAen_HK
dc.contributor.authorYang, Ken_HK
dc.contributor.authorLi Danny, HWen_HK
dc.contributor.authorCheung Sherman, CPen_HK
dc.date.accessioned2011-08-26T14:21:43Z-
dc.date.available2011-08-26T14:21:43Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal Of Wind Engineering And Industrial Aerodynamics, 2011, v. 99 n. 2-3, p. 79-90en_HK
dc.identifier.issn0167-6105en_HK
dc.identifier.urihttp://hdl.handle.net/10722/137246-
dc.description.abstractThis paper reports a systematic computational study of wind-induced natural ventilation and pollutant transport of re-entrant bays on a total of 30 generic building models of different building heights and with bays of different dimensions. Mean wind flow around each building model and wind-induced flow inside re-entrant bays are computed. To determine the ventilation efficiency of the bay, the computed flow field is used to disperse a scalar pollutant initially occupying the entire bay at a uniform concentration. The subsequent time decay of pollutant concentration inside the bay is studied and the ventilation efficiency is quantified by the retention time. The results show that wind-induced flow inside the bay, especially on the building side face, is complex and highly three-dimensional. Air exchange rates through the roof opening and vertical side opening are analyzed for each bay and their relationship to the ventilation efficiency is discussed. The bays on the building side faces are much worse ventilated than those on the windward or leeward building face. The deeper the side bay, the worse is the air exchange and ventilation. The building height is found to have a governing effect on the ventilation of the windward and leeward re-entrant bays. © 2010 Elsevier Ltd.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jweiaen_HK
dc.relation.ispartofJournal of Wind Engineering and Industrial Aerodynamicsen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Journal of Wind Engineering & Industrial Aerodynamics. 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 Journal of Wind Engineering & Industrial Aerodynamics, 2011, v. 99 n. 2-3, p. 79-90. DOI: 10.1016/j.jweia.2010.11.002-
dc.subjectCFD simulationsen_HK
dc.subjectHigh-rise buildingen_HK
dc.subjectMicro-climateen_HK
dc.subjectNatural ventilationen_HK
dc.subjectPollutant dispersionen_HK
dc.subjectRe-entrant baysen_HK
dc.subjectWind-structure interactionen_HK
dc.titleWind-induced natural ventilation of re-entrant bays in a high-rise buildingen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0167-6105&volume=99&issue=2-3&spage=79&epage=90&date=2011&atitle=Wind-induced+natural+ventilation+of+re-entrant+bays+in+a+high-rise+building-
dc.identifier.emailLam, KM:kmlam@hku.hken_HK
dc.identifier.authorityLam, KM=rp00134en_HK
dc.description.naturepostprint-
dc.identifier.doi10.1016/j.jweia.2010.11.002en_HK
dc.identifier.scopuseid_2-s2.0-79951677533en_HK
dc.identifier.hkuros190699en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79951677533&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume99en_HK
dc.identifier.issue2-3en_HK
dc.identifier.spage79en_HK
dc.identifier.epage90en_HK
dc.identifier.eissn1872-8197-
dc.identifier.isiWOS:000288722700001-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridCheng, CKC=16202021900en_HK
dc.identifier.scopusauthoridLam, KM=7403656958en_HK
dc.identifier.scopusauthoridLeung, YTA=36651009300en_HK
dc.identifier.scopusauthoridYang, K=10046438900en_HK
dc.identifier.scopusauthoridLi Danny, HW=36651059900en_HK
dc.identifier.scopusauthoridCheung Sherman, CP=36650178100en_HK
dc.identifier.citeulike8411640-

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