File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: CFD modelling of the effect of fire source geometry and location on smoke flow multiplicity

TitleCFD modelling of the effect of fire source geometry and location on smoke flow multiplicity
Authors
KeywordsSmoke flow
CFD simulation
Opposing wind
Fire source
Buoyancy flux ratio
Issue Date2010
PublisherTsinghua University Press & Springer-Verlag GmbH. The Journal's web site is located at http://www.springerlink.com/content/1996-3599/
Citation
Building Simulation, 2010, v. 3 n. 3, p. 205-214 How to Cite?
AbstractUnderstanding solution multiplicity of smoke flow at the same building configuration and ambient conditions is important for managing smoke flows and human evacuation in buildings. One of the known examples with solution multiplicity is in a simple single-compartment building on fire under an opposing wind. The occurrence of multiple solutions of smoke flow is induced by competing wind and thermal buoyancy forces. Under a given and moderate wind, the critical buoyancy flux ratio for the existence of smoke flow multiplicity, which is a ratio between defined parameters representing buoyancy force and wind pressure, is related to building height and opening area, as shown using a zone model. Computational fluid dynamics (CFD) simulations were used here to evaluate whether the behaviour of smoke flow multiplicity was affected by the geometry and location of the fire source(s). Our simulation results were in good agreement with previous macroscopic analysis results. A floor fire source can produce the largest smoke flow rate in the buoyancy-dominated flow regime among the tested cases while two corner sources can produce the smallest smoke flow rate. A floor source had a relatively large smoke flow rate in the wind-dominated flow regime while a point source had relatively small smoke flow rate. Moreover, a larger critical buoyancy flux ratio and a larger range of fire power in which smoke flow multiplicity existed were found for a floor fire source than for other sources. Switching of smoke flow solutions in building fires was found to depend on the initial conditions and the magnitude of flow perturbations.
Persistent Identifierhttp://hdl.handle.net/10722/139355
ISSN
2015 Impact Factor: 1.409
2015 SCImago Journal Rankings: 1.054
ISI Accession Number ID
Funding AgencyGrant Number
University of Hong Kong20062159003
Funding Information:

The work described in this paper was supported by a grant from the Seed Funding Programme for Basic Research (Project No. 20062159003) at the University of Hong Kong.

 

DC FieldValueLanguage
dc.contributor.authorGong, Jen_US
dc.contributor.authorLi, Yen_US
dc.date.accessioned2011-09-23T05:48:45Z-
dc.date.available2011-09-23T05:48:45Z-
dc.date.issued2010en_US
dc.identifier.citationBuilding Simulation, 2010, v. 3 n. 3, p. 205-214en_US
dc.identifier.issn1996-3599-
dc.identifier.urihttp://hdl.handle.net/10722/139355-
dc.description.abstractUnderstanding solution multiplicity of smoke flow at the same building configuration and ambient conditions is important for managing smoke flows and human evacuation in buildings. One of the known examples with solution multiplicity is in a simple single-compartment building on fire under an opposing wind. The occurrence of multiple solutions of smoke flow is induced by competing wind and thermal buoyancy forces. Under a given and moderate wind, the critical buoyancy flux ratio for the existence of smoke flow multiplicity, which is a ratio between defined parameters representing buoyancy force and wind pressure, is related to building height and opening area, as shown using a zone model. Computational fluid dynamics (CFD) simulations were used here to evaluate whether the behaviour of smoke flow multiplicity was affected by the geometry and location of the fire source(s). Our simulation results were in good agreement with previous macroscopic analysis results. A floor fire source can produce the largest smoke flow rate in the buoyancy-dominated flow regime among the tested cases while two corner sources can produce the smallest smoke flow rate. A floor source had a relatively large smoke flow rate in the wind-dominated flow regime while a point source had relatively small smoke flow rate. Moreover, a larger critical buoyancy flux ratio and a larger range of fire power in which smoke flow multiplicity existed were found for a floor fire source than for other sources. Switching of smoke flow solutions in building fires was found to depend on the initial conditions and the magnitude of flow perturbations.-
dc.languageengen_US
dc.publisherTsinghua University Press & Springer-Verlag GmbH. The Journal's web site is located at http://www.springerlink.com/content/1996-3599/-
dc.relation.ispartofBuilding Simulationen_US
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectSmoke flow-
dc.subjectCFD simulation-
dc.subjectOpposing wind-
dc.subjectFire source-
dc.subjectBuoyancy flux ratio-
dc.titleCFD modelling of the effect of fire source geometry and location on smoke flow multiplicityen_US
dc.typeArticleen_US
dc.identifier.emailLi, Y: liyg@hkucc.hku.hken_US
dc.identifier.authorityLi, Y=rp00151en_US
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s12273-010-0004-5-
dc.identifier.scopuseid_2-s2.0-84862869721-
dc.identifier.hkuros192417en_US
dc.identifier.volume3en_US
dc.identifier.issue3-
dc.identifier.spage205en_US
dc.identifier.epage214en_US
dc.identifier.isiWOS:000289291300003-
dc.identifier.citeulike7415826-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats