File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Multiple solutions of smoke flow in a building with an opposing wind

TitleMultiple solutions of smoke flow in a building with an opposing wind
Authors
KeywordsBuoyancy flow
CFD
Hysteresis
Macroscopic analysis
Opposing wind
Smoke flow
Solution multiplicity
Stability analysis
Issue Date2010
PublisherVEETECH Ltd. The Journal's web site is located at http://www.ijovent.org/
Citation
International Journal Of Ventilation, 2010, v. 9 n. 2, p. 99-114 How to Cite?
AbstractIn a simple single-zone building with two openings under an opposing wind, a macroscopic theoretical analysis of smoke flow direction and smoke mass flow rate is carried out. Three solutions of smoke flow are identified under the same building geometry, the same heat release rate and the same ambient conditions at the steady state. Two of the solutions are shown to be stable and one is unstable. In the two stable solutions, one is an upward smoke flow with an upper smoke layer and a lower air layer, which may be considered relatively safe in terms of smoke control and human evacuation. The other is a relatively unsafe downward smoke flow with the entire building space fully mixed with smoke. The effect of the initial conditions and perturbations of the smoke flow system are also discussed. Additionally, computational fluid dynamics (CFD) simulations are used to simulate the existence of multiple solutions of smoke flow, and a hysteresis phenomenon is found. The existence of solution multiplicity of smoke flow in a simple building shows that a further study of more complex and realistic situations is necessary.
Persistent Identifierhttp://hdl.handle.net/10722/139354
ISSN
2015 Impact Factor: 0.662
2015 SCImago Journal Rankings: 0.474
References

 

DC FieldValueLanguage
dc.contributor.authorGong, Jen_HK
dc.contributor.authorLi, Yen_HK
dc.date.accessioned2011-09-23T05:48:45Z-
dc.date.available2011-09-23T05:48:45Z-
dc.date.issued2010en_HK
dc.identifier.citationInternational Journal Of Ventilation, 2010, v. 9 n. 2, p. 99-114en_HK
dc.identifier.issn1473-3315en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139354-
dc.description.abstractIn a simple single-zone building with two openings under an opposing wind, a macroscopic theoretical analysis of smoke flow direction and smoke mass flow rate is carried out. Three solutions of smoke flow are identified under the same building geometry, the same heat release rate and the same ambient conditions at the steady state. Two of the solutions are shown to be stable and one is unstable. In the two stable solutions, one is an upward smoke flow with an upper smoke layer and a lower air layer, which may be considered relatively safe in terms of smoke control and human evacuation. The other is a relatively unsafe downward smoke flow with the entire building space fully mixed with smoke. The effect of the initial conditions and perturbations of the smoke flow system are also discussed. Additionally, computational fluid dynamics (CFD) simulations are used to simulate the existence of multiple solutions of smoke flow, and a hysteresis phenomenon is found. The existence of solution multiplicity of smoke flow in a simple building shows that a further study of more complex and realistic situations is necessary.en_HK
dc.languageengen_US
dc.publisherVEETECH Ltd. The Journal's web site is located at http://www.ijovent.org/en_HK
dc.relation.ispartofInternational Journal of Ventilationen_HK
dc.subjectBuoyancy flowen_HK
dc.subjectCFDen_HK
dc.subjectHysteresisen_HK
dc.subjectMacroscopic analysisen_HK
dc.subjectOpposing winden_HK
dc.subjectSmoke flowen_HK
dc.subjectSolution multiplicityen_HK
dc.subjectStability analysisen_HK
dc.titleMultiple solutions of smoke flow in a building with an opposing winden_HK
dc.typeArticleen_HK
dc.identifier.emailLi, Y:liyg@hkucc.hku.hken_HK
dc.identifier.authorityLi, Y=rp00151en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-77956926624en_HK
dc.identifier.hkuros192416en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77956926624&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume9en_HK
dc.identifier.issue2en_HK
dc.identifier.spage99en_HK
dc.identifier.epage114en_HK
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridGong, J=36542553600en_HK
dc.identifier.scopusauthoridLi, Y=7502094052en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats