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Article: CFD simulations of natural ventilation behaviour in high-rise buildings in regular and staggered arrangements at various spacings

TitleCFD simulations of natural ventilation behaviour in high-rise buildings in regular and staggered arrangements at various spacings
Authors
KeywordsBuilding disposition
Building interference
Computational fluid dynamics (CFD)
Cross ventilation
High-rise buildings
Natural ventilation
Issue Date2011
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/enbuild
Citation
Energy And Buildings, 2011, v. 43 n. 5, p. 1149-1158 How to Cite?
AbstractNatural ventilation, which is in line with the concepts of sustainability and green energy, is widely acknowledged nowadays. Prevailing winds in urban areas are unavoidably modified by the increasing number of closely placed high-rise buildings that significantly modify the natural ventilation behaviour. This paper explores the effects of building interference on natural ventilation using computational fluid dynamics (CFD) techniques. The cross-ventilation rate (temporal-average volumetric airflow rate) of hypothetical apartments in a building cluster under isothermal conditions was examined using the standard two-equation k - ε turbulence model. The sensitivity of ventilation rate to wind direction, building separation and building disposition (building shift) was studied. Placing buildings farther away from one another substantially promoted the ventilation rate, cancelling the unfavourable interference eventually when the building separation was about five times the building width (the optimum separation). The characteristic flow pattern leading to this behaviour was revealed. With the adoption of building disposition, the optimum separation could be reduced to three times the building width. In addition, the airflow rates could be doubled with suitable shifts. Building disposition is therefore one of the feasible solutions to improve the natural ventilation performance in our crowded environment. © 2010 Elsevier B.V. All rights reserved.
DescriptionTackling building energy consumption challenges - Special Issue of ISHVAC 2009, Nanjing, China
Persistent Identifierhttp://hdl.handle.net/10722/139408
ISSN
2015 Impact Factor: 2.973
2015 SCImago Journal Rankings: 2.073
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCheung, JOPen_HK
dc.contributor.authorLiu, CHen_HK
dc.date.accessioned2011-09-23T05:49:13Z-
dc.date.available2011-09-23T05:49:13Z-
dc.date.issued2011en_HK
dc.identifier.citationEnergy And Buildings, 2011, v. 43 n. 5, p. 1149-1158en_HK
dc.identifier.issn0378-7788en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139408-
dc.descriptionTackling building energy consumption challenges - Special Issue of ISHVAC 2009, Nanjing, China-
dc.description.abstractNatural ventilation, which is in line with the concepts of sustainability and green energy, is widely acknowledged nowadays. Prevailing winds in urban areas are unavoidably modified by the increasing number of closely placed high-rise buildings that significantly modify the natural ventilation behaviour. This paper explores the effects of building interference on natural ventilation using computational fluid dynamics (CFD) techniques. The cross-ventilation rate (temporal-average volumetric airflow rate) of hypothetical apartments in a building cluster under isothermal conditions was examined using the standard two-equation k - ε turbulence model. The sensitivity of ventilation rate to wind direction, building separation and building disposition (building shift) was studied. Placing buildings farther away from one another substantially promoted the ventilation rate, cancelling the unfavourable interference eventually when the building separation was about five times the building width (the optimum separation). The characteristic flow pattern leading to this behaviour was revealed. With the adoption of building disposition, the optimum separation could be reduced to three times the building width. In addition, the airflow rates could be doubled with suitable shifts. Building disposition is therefore one of the feasible solutions to improve the natural ventilation performance in our crowded environment. © 2010 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_US
dc.publisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/enbuilden_HK
dc.relation.ispartofEnergy and Buildingsen_HK
dc.subjectBuilding dispositionen_HK
dc.subjectBuilding interferenceen_HK
dc.subjectComputational fluid dynamics (CFD)en_HK
dc.subjectCross ventilationen_HK
dc.subjectHigh-rise buildingsen_HK
dc.subjectNatural ventilationen_HK
dc.titleCFD simulations of natural ventilation behaviour in high-rise buildings in regular and staggered arrangements at various spacingsen_HK
dc.typeArticleen_HK
dc.identifier.emailLiu, CH:chliu@hkucc.hku.hken_HK
dc.identifier.authorityLiu, CH=rp00152en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.enbuild.2010.11.024en_HK
dc.identifier.scopuseid_2-s2.0-79953025805en_HK
dc.identifier.hkuros195780en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79953025805&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume43en_HK
dc.identifier.issue5en_HK
dc.identifier.spage1149en_HK
dc.identifier.epage1158en_HK
dc.identifier.isiWOS:000290012800014-
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridCheung, JOP=36727209300en_HK
dc.identifier.scopusauthoridLiu, CH=36065161300en_HK
dc.identifier.citeulike8680830-

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