File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Numerical study on flow over buildings in street canyon

TitleNumerical study on flow over buildings in street canyon
Authors
Issue Date2001
PublisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.html
Citation
Journal Of Environmental Engineering, 2001, v. 127 n. 4, p. 369-376 How to Cite?
AbstractA 2D numerical investigation of the relationships between building height, gap distance, and wind velocity for flow in a street canyon is conducted using the computational fluid dynamics technique. The numerical scheme is first applied to a backward-facing step flow over a wide range of Reynolds numbers. Good agreement with experimental data from literature is found. It is then applied to study the flow around two rectangular buildings with various building heights, gap distances, and approaching wind velocities. Simulations show that the wind profile upstream of buildings is similar under different inflow wind velocities for a fixed building height. The maximum wind velocity in the street canyon largely depends on the configuration of the buildings. It increases dramatically when the gap-to-height ratio (G/H) of the buildings is increased from 0.75 to 1.0 but increases only mildly for G/H rising from 1.0 to 1.5. No significant increase in velocity can be found for a further increase in G/H. The flow pattern in the street canyon becomes more complex with an increasing height-to-gap ratio (H/G), particularly at low inflow velocity. Two or more stable recirculation vortices, which stack vertically in the street canyon, are found for H/G ≥ 3. For those simulations with nonidentical buildings, natural ventilation tends to be better in the case of the higher building located upstream.
Persistent Identifierhttp://hdl.handle.net/10722/75938
ISSN
2015 Impact Factor: 1.125
2015 SCImago Journal Rankings: 0.462
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorXia, Jen_HK
dc.contributor.authorLeung, DYCen_HK
dc.date.accessioned2010-09-06T07:16:02Z-
dc.date.available2010-09-06T07:16:02Z-
dc.date.issued2001en_HK
dc.identifier.citationJournal Of Environmental Engineering, 2001, v. 127 n. 4, p. 369-376en_HK
dc.identifier.issn0733-9372en_HK
dc.identifier.urihttp://hdl.handle.net/10722/75938-
dc.description.abstractA 2D numerical investigation of the relationships between building height, gap distance, and wind velocity for flow in a street canyon is conducted using the computational fluid dynamics technique. The numerical scheme is first applied to a backward-facing step flow over a wide range of Reynolds numbers. Good agreement with experimental data from literature is found. It is then applied to study the flow around two rectangular buildings with various building heights, gap distances, and approaching wind velocities. Simulations show that the wind profile upstream of buildings is similar under different inflow wind velocities for a fixed building height. The maximum wind velocity in the street canyon largely depends on the configuration of the buildings. It increases dramatically when the gap-to-height ratio (G/H) of the buildings is increased from 0.75 to 1.0 but increases only mildly for G/H rising from 1.0 to 1.5. No significant increase in velocity can be found for a further increase in G/H. The flow pattern in the street canyon becomes more complex with an increasing height-to-gap ratio (H/G), particularly at low inflow velocity. Two or more stable recirculation vortices, which stack vertically in the street canyon, are found for H/G ≥ 3. For those simulations with nonidentical buildings, natural ventilation tends to be better in the case of the higher building located upstream.en_HK
dc.languageengen_HK
dc.publisherAmerican Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/ee.htmlen_HK
dc.relation.ispartofJournal of Environmental Engineeringen_HK
dc.rightsJournal of Environmental Engineering. Copyright © American Society of Civil Engineers.en_HK
dc.titleNumerical study on flow over buildings in street canyonen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0733-9372&volume=127&spage=369&epage=376&date=2001&atitle=Numerical+study+on+flow+over+buildings+in+street+canyonen_HK
dc.identifier.emailLeung, DYC:ycleung@hku.hken_HK
dc.identifier.authorityLeung, DYC=rp00149en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1061/(ASCE)0733-9372(2001)127:4(369)en_HK
dc.identifier.scopuseid_2-s2.0-0035312604en_HK
dc.identifier.hkuros59305en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035312604&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume127en_HK
dc.identifier.issue4en_HK
dc.identifier.spage369en_HK
dc.identifier.epage376en_HK
dc.identifier.isiWOS:000167714700012-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridXia, J=7402327322en_HK
dc.identifier.scopusauthoridLeung, DYC=7203002484en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats