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Article: Experimental and CFD evidence of multiple solutions in a naturally ventilated building

TitleExperimental and CFD evidence of multiple solutions in a naturally ventilated building
Authors
Issue Date2004
PublisherBlackwell Munksgaard. The Journal's web site is located at http://www.blackwellpublishing.com/journals/INA
Citation
Indoor Air, 2004, v. 14 n. 1, p. 43-54 How to Cite?
AbstractThis paper considers the existence of multiple solutions to natural ventilation of a simple one-zone building, driven by combined thermal and opposing wind forces. The present analysis is an extension of an earlier analytical study of natural ventilation in a fully mixed building, and includes the effect of thermal stratification. Both computational and experimental investigations were carried out in parallel with an analytical investigation. When flow is dominated by thermal buoyancy, it was found experimentally that there is thermal stratification. When the flow is wind-dominated, the room is fully mixed. Results from all three methods have shown that the hysteresis phenomena exist. Under certain conditions, two different stable steady-state solutions are found to exist by all three methods for the same set of parameters. As shown by both the computational fluid dynamics (CFD) and experimental results, one of the solutions can shift to another when there is a sufficient perturbation. These results have probably provided the strongest evidence so far for the conclusion that multiple states exist in natural ventilation of simple buildings. Different initial conditions in the CFD simulations led to different solutions, suggesting that caution must be taken when adopting the commonly used 'zero initialization'. © Indoor Air (2003).
Persistent Identifierhttp://hdl.handle.net/10722/156748
ISSN
2015 Impact Factor: 4.33
2015 SCImago Journal Rankings: 1.666
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHeiselberg, Pen_US
dc.contributor.authorLi, Yen_US
dc.contributor.authorAndersen, Aen_US
dc.contributor.authorBjerre, Men_US
dc.contributor.authorChen, Zen_US
dc.date.accessioned2012-08-08T08:43:48Z-
dc.date.available2012-08-08T08:43:48Z-
dc.date.issued2004en_US
dc.identifier.citationIndoor Air, 2004, v. 14 n. 1, p. 43-54en_US
dc.identifier.issn0905-6947en_US
dc.identifier.urihttp://hdl.handle.net/10722/156748-
dc.description.abstractThis paper considers the existence of multiple solutions to natural ventilation of a simple one-zone building, driven by combined thermal and opposing wind forces. The present analysis is an extension of an earlier analytical study of natural ventilation in a fully mixed building, and includes the effect of thermal stratification. Both computational and experimental investigations were carried out in parallel with an analytical investigation. When flow is dominated by thermal buoyancy, it was found experimentally that there is thermal stratification. When the flow is wind-dominated, the room is fully mixed. Results from all three methods have shown that the hysteresis phenomena exist. Under certain conditions, two different stable steady-state solutions are found to exist by all three methods for the same set of parameters. As shown by both the computational fluid dynamics (CFD) and experimental results, one of the solutions can shift to another when there is a sufficient perturbation. These results have probably provided the strongest evidence so far for the conclusion that multiple states exist in natural ventilation of simple buildings. Different initial conditions in the CFD simulations led to different solutions, suggesting that caution must be taken when adopting the commonly used 'zero initialization'. © Indoor Air (2003).en_US
dc.languageengen_US
dc.publisherBlackwell Munksgaard. The Journal's web site is located at http://www.blackwellpublishing.com/journals/INAen_US
dc.relation.ispartofIndoor Airen_US
dc.subject.meshAir Movementsen_US
dc.subject.meshAir Pollutants - Analysisen_US
dc.subject.meshAir Pollution, Indoor - Prevention & Controlen_US
dc.subject.meshHumansen_US
dc.subject.meshModels, Theoreticalen_US
dc.subject.meshSick Building Syndrome - Prevention & Controlen_US
dc.subject.meshVentilation - Methodsen_US
dc.titleExperimental and CFD evidence of multiple solutions in a naturally ventilated buildingen_US
dc.typeArticleen_US
dc.identifier.emailLi, Y: liyg@hkucc.hku.hken_US
dc.identifier.authorityLi, Y=rp00151en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1046/j.1600-0668.2003.00209.xen_US
dc.identifier.pmid14756845-
dc.identifier.scopuseid_2-s2.0-1542530850en_US
dc.identifier.hkuros91024-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-1542530850&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume14en_US
dc.identifier.issue1en_US
dc.identifier.spage43en_US
dc.identifier.epage54en_US
dc.identifier.isiWOS:000188721000006-
dc.publisher.placeDenmarken_US
dc.identifier.scopusauthoridHeiselberg, P=6602100825en_US
dc.identifier.scopusauthoridLi, Y=7502094052en_US
dc.identifier.scopusauthoridAndersen, A=7402511091en_US
dc.identifier.scopusauthoridBjerre, M=6506248219en_US
dc.identifier.scopusauthoridChen, Z=7409481918en_US

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