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Article: On the heating environment in street canyon

TitleOn the heating environment in street canyon
Authors
KeywordsCFD
Heating
Street-canyon
Surface-temperature
Turbulence
Issue Date2011
PublisherSpringer Verlag Dordrecht. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=1567-7419
Citation
Environmental Fluid Mechanics, 2011, v. 11 n. 5, p. 465-480 How to Cite?
AbstractThis study investigates the impact of building aspect ratio (building-height-to-street-canyon-width-ratio), wind speed and surface and air-temperature difference (Δθs-a) on the heating environment within street canyon. The Reynolds-averaged Navier-Stokes (RANS) and energy transport equations were solved with Renormalization group (RNG) theory version of k-turbulence model. The validation process demonstrated that the model could be trusted for simulating air-temperature and velocity trends. The temperature and velocity patterns were discussed in idealized street canyons of different aspect ratios (0.5-2.0) with varying ambient wind speeds (0.5-1.5 m/s) and Δθs-a (2-8 K). Results show that air-temperatures are directly proportional to bulk Richardson number (Rb) for all but ground heating situation. Conversely, air-temperatures increase significantly across the street canyon with a decrease in ambient wind speed; however, the impact of Δθs-a was negligible. Clearly, ambient wind speed decreases significantly as it passes over higher AR street canyons. Notably, air-temperatures were the highest when the windward wall was heated and the least during ground heating. Conversely, air-temperatures were lower along the windward side but higher within the street canyon when the windward wall was heated. © 2010 The Author(s).
Persistent Identifierhttp://hdl.handle.net/10722/145102
ISSN
2015 Impact Factor: 1.394
2015 SCImago Journal Rankings: 0.585
ISI Accession Number ID
Funding AgencyGrant Number
University Research Committee, University of Hong Kong
Funding Information:

The authors are grateful to the University Research Committee, University of Hong Kong, for providing necessary funding for this work. The first author is also thankful to the Department of Mechanical Engineering, Mehran University of Engineering and Technology (MUET), Jamshoro, Pakistan for providing necessary facilities to carry out this work.

References

 

DC FieldValueLanguage
dc.contributor.authorMemon, RAen_HK
dc.contributor.authorLeung, DYCen_HK
dc.date.accessioned2012-02-21T05:44:44Z-
dc.date.available2012-02-21T05:44:44Z-
dc.date.issued2011en_HK
dc.identifier.citationEnvironmental Fluid Mechanics, 2011, v. 11 n. 5, p. 465-480en_HK
dc.identifier.issn1567-7419en_HK
dc.identifier.urihttp://hdl.handle.net/10722/145102-
dc.description.abstractThis study investigates the impact of building aspect ratio (building-height-to-street-canyon-width-ratio), wind speed and surface and air-temperature difference (Δθs-a) on the heating environment within street canyon. The Reynolds-averaged Navier-Stokes (RANS) and energy transport equations were solved with Renormalization group (RNG) theory version of k-turbulence model. The validation process demonstrated that the model could be trusted for simulating air-temperature and velocity trends. The temperature and velocity patterns were discussed in idealized street canyons of different aspect ratios (0.5-2.0) with varying ambient wind speeds (0.5-1.5 m/s) and Δθs-a (2-8 K). Results show that air-temperatures are directly proportional to bulk Richardson number (Rb) for all but ground heating situation. Conversely, air-temperatures increase significantly across the street canyon with a decrease in ambient wind speed; however, the impact of Δθs-a was negligible. Clearly, ambient wind speed decreases significantly as it passes over higher AR street canyons. Notably, air-temperatures were the highest when the windward wall was heated and the least during ground heating. Conversely, air-temperatures were lower along the windward side but higher within the street canyon when the windward wall was heated. © 2010 The Author(s).en_HK
dc.languageengen_US
dc.publisherSpringer Verlag Dordrecht. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=1567-7419en_HK
dc.relation.ispartofEnvironmental Fluid Mechanicsen_HK
dc.rightsThe Author(s)en_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong Licenseen_US
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectCFDen_HK
dc.subjectHeatingen_HK
dc.subjectStreet-canyonen_HK
dc.subjectSurface-temperatureen_HK
dc.subjectTurbulenceen_HK
dc.titleOn the heating environment in street canyonen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4551/resserv?sid=springerlink&genre=article&atitle=On the heating environment in street canyon&title=Environmental Fluid Mechanics&issn=15677419&date=2011-10-01&volume=11&issue=5& spage=465&authors=Rizwan Ahmed Memon, D. Y. C. Leungen_US
dc.identifier.emailLeung, DYC:ycleung@hku.hken_HK
dc.identifier.authorityLeung, DYC=rp00149en_HK
dc.description.naturepublished_or_final_versionen_US
dc.identifier.doi10.1007/s10652-010-9202-zen_HK
dc.identifier.scopuseid_2-s2.0-80052461559en_HK
dc.identifier.hkuros200095-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80052461559&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume11en_HK
dc.identifier.issue5en_HK
dc.identifier.spage465en_HK
dc.identifier.epage480en_HK
dc.identifier.eissn1573-1510en_US
dc.identifier.isiWOS:000294801200002-
dc.publisher.placeNetherlandsen_HK
dc.description.otherSpringer Open Choice, 21 Feb 2012en_US
dc.identifier.scopusauthoridMemon, RA=26656757300en_HK
dc.identifier.scopusauthoridLeung, DYC=7203002484en_HK
dc.identifier.citeulike8604747-

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