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Article: Calculation of wind-driven cross ventilation in buildings with large openings

TitleCalculation of wind-driven cross ventilation in buildings with large openings
Authors
KeywordsComputational fluid dynamics
Large openings
Macroscopic model
Natural ventilation
Stream tube
Issue Date2006
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jweia
Citation
Journal Of Wind Engineering And Industrial Aerodynamics, 2006, v. 94 n. 12, p. 925-947 How to Cite?
AbstractA simplified macroscopic method is commonly used for wind-driven ventilation analysis of buildings with small openings. Consequently, it is reasonable to question if and under what conditions will this method provide accurate results in predicting ventilation flow rates in buildings with large openings. We investigate a single-zone cubic building with two equal large openings using a computational fluid dynamics approach. We analyzed the driving forces and the ventilation flow rates due to wind as a function of the geometry, size and relative location of the two openings. The ventilation flow rates are found to be affected by both wind flows around and through the building when the two openings are relatively large. The simplified macroscopic method can provide reasonable engineering accuracy (i.e., less than 10% error) when the porosity of the building envelope does not exceed a critical value. This critical value is not a constant; instead it depends significantly on the degree of alignment between the wind direction and the character of the dominant stream tube associated with the flow through the room. We found that the simplified macroscopic method fails to provide acceptable accuracy when this stream tube is truly dominant and parallel to the wind direction. The effects of wall thickness and aspect ratio of openings are also investigated. © 2006 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/75998
ISSN
2015 Impact Factor: 2.024
2015 SCImago Journal Rankings: 1.097
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorSeifert, Jen_HK
dc.contributor.authorLi, Yen_HK
dc.contributor.authorAxley, Jen_HK
dc.contributor.authorRösler, Men_HK
dc.date.accessioned2010-09-06T07:16:37Z-
dc.date.available2010-09-06T07:16:37Z-
dc.date.issued2006en_HK
dc.identifier.citationJournal Of Wind Engineering And Industrial Aerodynamics, 2006, v. 94 n. 12, p. 925-947en_HK
dc.identifier.issn0167-6105en_HK
dc.identifier.urihttp://hdl.handle.net/10722/75998-
dc.description.abstractA simplified macroscopic method is commonly used for wind-driven ventilation analysis of buildings with small openings. Consequently, it is reasonable to question if and under what conditions will this method provide accurate results in predicting ventilation flow rates in buildings with large openings. We investigate a single-zone cubic building with two equal large openings using a computational fluid dynamics approach. We analyzed the driving forces and the ventilation flow rates due to wind as a function of the geometry, size and relative location of the two openings. The ventilation flow rates are found to be affected by both wind flows around and through the building when the two openings are relatively large. The simplified macroscopic method can provide reasonable engineering accuracy (i.e., less than 10% error) when the porosity of the building envelope does not exceed a critical value. This critical value is not a constant; instead it depends significantly on the degree of alignment between the wind direction and the character of the dominant stream tube associated with the flow through the room. We found that the simplified macroscopic method fails to provide acceptable accuracy when this stream tube is truly dominant and parallel to the wind direction. The effects of wall thickness and aspect ratio of openings are also investigated. © 2006 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
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.subjectComputational fluid dynamicsen_HK
dc.subjectLarge openingsen_HK
dc.subjectMacroscopic modelen_HK
dc.subjectNatural ventilationen_HK
dc.subjectStream tubeen_HK
dc.titleCalculation of wind-driven cross ventilation in buildings with large openingsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0167-6105&volume=94&issue=12&spage=925&epage=947 &date=2006&atitle=Calculation+of+wind-driven+cross+ventilation+in+buildings+with+large+openingsen_HK
dc.identifier.emailLi, Y:liyg@hkucc.hku.hken_HK
dc.identifier.authorityLi, Y=rp00151en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jweia.2006.04.002en_HK
dc.identifier.scopuseid_2-s2.0-33751252250en_HK
dc.identifier.hkuros134410en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33751252250&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume94en_HK
dc.identifier.issue12en_HK
dc.identifier.spage925en_HK
dc.identifier.epage947en_HK
dc.identifier.isiWOS:000242642900001-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridSeifert, J=15133487100en_HK
dc.identifier.scopusauthoridLi, Y=7502094052en_HK
dc.identifier.scopusauthoridAxley, J=6603844433en_HK
dc.identifier.scopusauthoridRösler, M=8582294200en_HK

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