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Article: Multiple solutions in a building with four openings ventilated by combined forces

TitleMultiple solutions in a building with four openings ventilated by combined forces
Authors
KeywordsAir flows
Macroscopic model
Natural ventilation
Network model
Solution multiplicity
Issue Date2005
PublisherSage Publications Ltd.. The Journal's web site is located at http://ibe.sagepub.com
Citation
Indoor And Built Environment, 2005, v. 14 n. 5, p. 347-358 How to Cite?
AbstractEver since the existence of two stable ventilation solutions in a two-opening building was identified, questions have been asked whether multiple solutions of natural ventilation exist in complex buildings and what are the physical mechanisms that can lead to the existence of multiple solutions in complex buildings. We examined a simple one-zone building with four openings using the simple macroscopic method of thermofluid modelling by assuming that the air temperature in the building was uniform. A conventional network modelling computer program was used to simulate the four-opening building ventilated by combined buoyancy and wind forces. The ventilation flow rate in the simple four-opening building was found to be a linear superimposition of that in two corresponding two-opening buildings with opposing and assisting winds respectively. We have shown that when the ventilation flow in the two-opening building with opposing wind is sufficiently strong, two stable solutions and one unstable solution can exist in the corresponding four-opening building. There is a good agreement between the ventilation flow rates predicted by the network modelling method and our simple analytical solutions. The findings suggest the possible existence of multiple solutions in complex building configurations. © 2005 Sage Publications.
Persistent Identifierhttp://hdl.handle.net/10722/76028
ISSN
2015 Impact Factor: 0.943
2015 SCImago Journal Rankings: 0.522
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLi, Yen_HK
dc.contributor.authorDuan, Sen_HK
dc.contributor.authorZhang, Gen_HK
dc.date.accessioned2010-09-06T07:16:55Z-
dc.date.available2010-09-06T07:16:55Z-
dc.date.issued2005en_HK
dc.identifier.citationIndoor And Built Environment, 2005, v. 14 n. 5, p. 347-358en_HK
dc.identifier.issn1420-326Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/76028-
dc.description.abstractEver since the existence of two stable ventilation solutions in a two-opening building was identified, questions have been asked whether multiple solutions of natural ventilation exist in complex buildings and what are the physical mechanisms that can lead to the existence of multiple solutions in complex buildings. We examined a simple one-zone building with four openings using the simple macroscopic method of thermofluid modelling by assuming that the air temperature in the building was uniform. A conventional network modelling computer program was used to simulate the four-opening building ventilated by combined buoyancy and wind forces. The ventilation flow rate in the simple four-opening building was found to be a linear superimposition of that in two corresponding two-opening buildings with opposing and assisting winds respectively. We have shown that when the ventilation flow in the two-opening building with opposing wind is sufficiently strong, two stable solutions and one unstable solution can exist in the corresponding four-opening building. There is a good agreement between the ventilation flow rates predicted by the network modelling method and our simple analytical solutions. The findings suggest the possible existence of multiple solutions in complex building configurations. © 2005 Sage Publications.en_HK
dc.languageengen_HK
dc.publisherSage Publications Ltd.. The Journal's web site is located at http://ibe.sagepub.comen_HK
dc.relation.ispartofIndoor and Built Environmenten_HK
dc.subjectAir flowsen_HK
dc.subjectMacroscopic modelen_HK
dc.subjectNatural ventilationen_HK
dc.subjectNetwork modelen_HK
dc.subjectSolution multiplicityen_HK
dc.titleMultiple solutions in a building with four openings ventilated by combined forcesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1420-326X&volume=14&issue=5&spage=347&epage=358&date=2005&atitle=Multiple+solutions+in+a+building+with+four+openings+ventilated+by+combined+forcesen_HK
dc.identifier.emailLi, Y:liyg@hkucc.hku.hken_HK
dc.identifier.authorityLi, Y=rp00151en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1177/1420326X05057445en_HK
dc.identifier.scopuseid_2-s2.0-27344450285en_HK
dc.identifier.hkuros118213en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-27344450285&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume14en_HK
dc.identifier.issue5en_HK
dc.identifier.spage347en_HK
dc.identifier.epage358en_HK
dc.identifier.isiWOS:000232944700003-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLi, Y=7502094052en_HK
dc.identifier.scopusauthoridDuan, S=8917244800en_HK
dc.identifier.scopusauthoridZhang, G=7405270070en_HK

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