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Article: Study of turbulence and pollutant dispersion in a neutrally and unstably stratified atmosphere using a second-order closure boundary-layer model

TitleStudy of turbulence and pollutant dispersion in a neutrally and unstably stratified atmosphere using a second-order closure boundary-layer model
Authors
KeywordsAir Pollutant Dispersion
Finite Element Method
Second-Order Closure Model
Issue Date2001
PublisherInderscience Publishers. The Journal's web site is located at http://www.inderscience.com/ijep
Citation
International Journal of Environment And Pollution, 2001, v. 16 n. 1-6, p. 16-27 How to Cite?
AbstractA one-dimensional, mesoscale second-order closure boundary-layer model is developed to simulate wind flow in a horizontally homogeneous atmosphere. The velocity, potential temperature and turbulent kinetic energy are calculated prognostically, while other second-order moments are modelled diagnostically. The calculated turbulence is then treated as background turbulence to model the dispersion of pollutants emitted from a hypothetical continuous point source. The dispersion model is of second-order closure that prognostically calculates both the mean and second-order moments. Numerical simulations of turbulence and pollutant dispersion in a neutrally and unstably stratified atmosphere are performed. The calculated velocity fluctuation profiles and pollutant concentrations agree well with experimental measurements. The calculated pollutant concentrations in neutral stability show Gaussian plume shape. However, their unstable counterparts show obvious plume descent and rise that is non-Gaussian in nature. This study demonstrates the capability of second-order closure models in calculating plume dispersion in neutral and unstable stratification.
Persistent Identifierhttp://hdl.handle.net/10722/156611
ISSN
2015 Impact Factor: 0.515
2015 SCImago Journal Rankings: 0.241
References

 

DC FieldValueLanguage
dc.contributor.authorLiu, CHen_US
dc.contributor.authorLeung, DYCen_US
dc.date.accessioned2012-08-08T08:43:11Z-
dc.date.available2012-08-08T08:43:11Z-
dc.date.issued2001en_US
dc.identifier.citationInternational Journal of Environment And Pollution, 2001, v. 16 n. 1-6, p. 16-27en_US
dc.identifier.issn0957-4352en_US
dc.identifier.urihttp://hdl.handle.net/10722/156611-
dc.description.abstractA one-dimensional, mesoscale second-order closure boundary-layer model is developed to simulate wind flow in a horizontally homogeneous atmosphere. The velocity, potential temperature and turbulent kinetic energy are calculated prognostically, while other second-order moments are modelled diagnostically. The calculated turbulence is then treated as background turbulence to model the dispersion of pollutants emitted from a hypothetical continuous point source. The dispersion model is of second-order closure that prognostically calculates both the mean and second-order moments. Numerical simulations of turbulence and pollutant dispersion in a neutrally and unstably stratified atmosphere are performed. The calculated velocity fluctuation profiles and pollutant concentrations agree well with experimental measurements. The calculated pollutant concentrations in neutral stability show Gaussian plume shape. However, their unstable counterparts show obvious plume descent and rise that is non-Gaussian in nature. This study demonstrates the capability of second-order closure models in calculating plume dispersion in neutral and unstable stratification.en_US
dc.languageengen_US
dc.publisherInderscience Publishers. The Journal's web site is located at http://www.inderscience.com/ijepen_US
dc.relation.ispartofInternational Journal of Environment and Pollutionen_US
dc.rightsInternational Journal of Environment and Pollution. Copyright © Inderscience Publishers.-
dc.subjectAir Pollutant Dispersionen_US
dc.subjectFinite Element Methoden_US
dc.subjectSecond-Order Closure Modelen_US
dc.titleStudy of turbulence and pollutant dispersion in a neutrally and unstably stratified atmosphere using a second-order closure boundary-layer modelen_US
dc.typeArticleen_US
dc.identifier.emailLiu, CH: chliu@hkucc.hku.hken_US
dc.identifier.emailLeung, DYC: ycleung@hku.hken_US
dc.identifier.authorityLiu, CH=rp00152en_US
dc.identifier.authorityLeung, DYC=rp00149en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0035561950en_US
dc.identifier.hkuros78430-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035561950&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume16en_US
dc.identifier.issue1-6en_US
dc.identifier.spage16en_US
dc.identifier.epage27en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridLiu, CH=36065161300en_US
dc.identifier.scopusauthoridLeung, DYC=7203002484en_US

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