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Article: An efficient approach to transient turbulent dispersion modeling by CFD-statistical analysis of a many-puff system

TitleAn efficient approach to transient turbulent dispersion modeling by CFD-statistical analysis of a many-puff system
Authors
KeywordsAccidental release
Airborne transmission
Cfd analysis
Computational time
Computationally efficient
Issue Date2009
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/journals/fdr
Citation
Fluid Dynamics Research, 2009, v. 41 n. 3 How to Cite?
AbstractTransient turbulent dispersion phenomena can be found in various practical problems, such as the accidental release of toxic chemical vapor and the airborne transmission of infectious droplets. Computational fluid dynamics (CFD) is an effective tool for analyzing such transient dispersion behaviors. However, the transient CFD analysis is often computationally expensive and time consuming. In the present study, a computationally efficient CFD-statistical hybrid modeling method has been developed for studying transient turbulent dispersion. In this method, the source emission is represented by emissions of many infinitesimal puffs. Statistical analysis is performed to obtain first the statistical properties of the puff trajectories and subsequently the most probable distribution of the puff trajectories that represent the macroscopic dispersion behaviors. In two case studies of ambient dispersion, the numerical modeling results obtained agree reasonably well with both experimental measurements and conventional k-ε modeling results published in the literature. More importantly, the proposed many-puff CFD-statistical hybrid modeling method effectively reduces the computational time by two orders of magnitude. © 2009 The Japan Society of Fluid Mechanics and IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/75520
ISSN
2015 Impact Factor: 0.846
2015 SCImago Journal Rankings: 0.463
ISI Accession Number ID
Funding AgencyGrant Number
The University of Hong Kong10206802
10207828
Funding Information:

The work described in this paper was supported by grants from The University of Hong Kong (project numbers 10206802 and 10207828).

References

 

DC FieldValueLanguage
dc.contributor.authorChing, WHen_HK
dc.contributor.authorLeung, MKHen_HK
dc.contributor.authorLeung, DYCen_HK
dc.date.accessioned2010-09-06T07:11:58Z-
dc.date.available2010-09-06T07:11:58Z-
dc.date.issued2009en_HK
dc.identifier.citationFluid Dynamics Research, 2009, v. 41 n. 3en_HK
dc.identifier.issn0169-5983en_HK
dc.identifier.urihttp://hdl.handle.net/10722/75520-
dc.description.abstractTransient turbulent dispersion phenomena can be found in various practical problems, such as the accidental release of toxic chemical vapor and the airborne transmission of infectious droplets. Computational fluid dynamics (CFD) is an effective tool for analyzing such transient dispersion behaviors. However, the transient CFD analysis is often computationally expensive and time consuming. In the present study, a computationally efficient CFD-statistical hybrid modeling method has been developed for studying transient turbulent dispersion. In this method, the source emission is represented by emissions of many infinitesimal puffs. Statistical analysis is performed to obtain first the statistical properties of the puff trajectories and subsequently the most probable distribution of the puff trajectories that represent the macroscopic dispersion behaviors. In two case studies of ambient dispersion, the numerical modeling results obtained agree reasonably well with both experimental measurements and conventional k-ε modeling results published in the literature. More importantly, the proposed many-puff CFD-statistical hybrid modeling method effectively reduces the computational time by two orders of magnitude. © 2009 The Japan Society of Fluid Mechanics and IOP Publishing Ltd.en_HK
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/journals/fdren_HK
dc.relation.ispartofFluid Dynamics Researchen_HK
dc.rightsFluid Dynamics Research. Copyright © Elsevier BV.en_HK
dc.subjectAccidental release-
dc.subjectAirborne transmission-
dc.subjectCfd analysis-
dc.subjectComputational time-
dc.subjectComputationally efficient-
dc.titleAn efficient approach to transient turbulent dispersion modeling by CFD-statistical analysis of a many-puff systemen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0169-5983&volume=41&issue=3 article no. 035512&spage=&epage=&date=2009&atitle=An+efficient+approach+to+transient+turbulent+dispersion+modeling+by+CFD-statistical+analysis+of+a+many-puff+systemen_HK
dc.identifier.emailLeung, MKH:en_HK
dc.identifier.emailLeung, DYC: ycleung@hku.hken_HK
dc.identifier.authorityLeung, MKH=rp00148en_HK
dc.identifier.authorityLeung, DYC=rp00149en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0169-5983/41/3/035512en_HK
dc.identifier.scopuseid_2-s2.0-66149100514en_HK
dc.identifier.hkuros164067en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-66149100514&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume41en_HK
dc.identifier.issue3en_HK
dc.identifier.isiWOS:000270658600014-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridChing, WH=7101701289en_HK
dc.identifier.scopusauthoridLeung, MKH=8862966600en_HK
dc.identifier.scopusauthoridLeung, DYC=7203002484en_HK

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