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Article: A numerical study of turbulent line puffs via the renormalization group (RNG) k–ϵ model

TitleA numerical study of turbulent line puffs via the renormalization group (RNG) k–ϵ model
Authors
KeywordsPuffs and thermals
Turbulence modelling
Jets and plumes
Environmental fluid mechanics
Vortex flow
Issue Date1998
PublisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/2861
Citation
International Journal for Numerical Methods in Fluids, 1998, v. 26 n. 2, p. 217-247 How to Cite?
AbstractThe time evolution of a line puff, a turbulent non-buoyant element with significant momentum, is studied using the renormalization group (RNG) k–ϵ model. The numerical results show that the puff motion is characterized by a vortex pair flow; the computed flow details and scalar mixing characteristics can be described by self-similar relations beyond a dimensionless time of around 30. The added mass coefficient of the puff motion is found to be approximately unity. The predicted puff flow and mixing rate are substantially similar to those obtained from the standard k–ϵ model and are well supported by experimental data. The computed scalar field reveals significant secondary concentration peaks trailing behind in the wake of the puff. The present results suggest that the overall mixing rate of a puff is primarily determined by the large-scale motion and that streamline curvature probably plays a minor role. © 1998 John Wiley & Sons, Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/71239
ISSN
2015 Impact Factor: 1.447
2015 SCImago Journal Rankings: 1.146

 

DC FieldValueLanguage
dc.contributor.authorLee, JHW-
dc.contributor.authorChen, GQ-
dc.date.accessioned2010-09-06T06:30:11Z-
dc.date.available2010-09-06T06:30:11Z-
dc.date.issued1998-
dc.identifier.citationInternational Journal for Numerical Methods in Fluids, 1998, v. 26 n. 2, p. 217-247-
dc.identifier.issn0271-2091-
dc.identifier.urihttp://hdl.handle.net/10722/71239-
dc.description.abstractThe time evolution of a line puff, a turbulent non-buoyant element with significant momentum, is studied using the renormalization group (RNG) k–ϵ model. The numerical results show that the puff motion is characterized by a vortex pair flow; the computed flow details and scalar mixing characteristics can be described by self-similar relations beyond a dimensionless time of around 30. The added mass coefficient of the puff motion is found to be approximately unity. The predicted puff flow and mixing rate are substantially similar to those obtained from the standard k–ϵ model and are well supported by experimental data. The computed scalar field reveals significant secondary concentration peaks trailing behind in the wake of the puff. The present results suggest that the overall mixing rate of a puff is primarily determined by the large-scale motion and that streamline curvature probably plays a minor role. © 1998 John Wiley & Sons, Ltd.-
dc.languageeng-
dc.publisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://www3.interscience.wiley.com/cgi-bin/jhome/2861-
dc.relation.ispartofInternational Journal for Numerical Methods in Fluids-
dc.rightsInternational Journal for Numerical Methods in Fluids. Copyright © John Wiley & Sons Ltd.-
dc.rightsSpecial Statement for Preprint only Before publication: 'This is a preprint of an article accepted for publication in [The Journal of Pathology] Copyright © ([year]) ([Pathological Society of Great Britain and Ireland])'. After publication: the preprint notice should be amended to follows: 'This is a preprint of an article published in [include the complete citation information for the final version of the Contribution as published in the print edition of the Journal]' For Cochrane Library/ Cochrane Database of Systematic Reviews, add statement & acknowledgement : ‘This review is published as a Cochrane Review in the Cochrane Database of Systematic Reviews 20XX, Issue X. Cochrane Reviews are regularly updated as new evidence emerges and in response to comments and criticisms, and the Cochrane Database of Systematic Reviews should be consulted for the most recent version of the Review.’ Please include reference to the Review and hyperlink to the original version using the following format e.g. Authors. Title of Review. Cochrane Database of Systematic Reviews 20XX, Issue #. Art. No.: CD00XXXX. DOI: 10.1002/14651858.CD00XXXX (insert persistent link to the article by using the URL: http://dx.doi.org/10.1002/14651858.CD00XXXX) (This statement should refer to the most recent issue of the Cochrane Database of Systematic Reviews in which the Review published.)-
dc.subjectPuffs and thermals-
dc.subjectTurbulence modelling-
dc.subjectJets and plumes-
dc.subjectEnvironmental fluid mechanics-
dc.subjectVortex flow-
dc.titleA numerical study of turbulent line puffs via the renormalization group (RNG) k–ϵ model-
dc.typeArticle-
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0271-2091&volume=26&spage=217 &epage= 234&date=1998&atitle=A+numerical+study+of+turbulent+line+puffs+via+the+Renormalization+Group+(RNG)+k+-+ce++model%27%27en_HK
dc.identifier.emailLee, JHW: hreclhw@hku.hk-
dc.identifier.emailChen, GQ: chengang@hkucc.hku.hk-
dc.identifier.authorityLee, JHW=rp00061-
dc.identifier.doi10.1002/(SICI)1097-0363(19980130)26:2<217::AID-FLD637>3.0.CO;2-G-
dc.identifier.hkuros36658-
dc.identifier.volume26-
dc.identifier.issue2-
dc.identifier.spage217-
dc.identifier.epage247-
dc.publisher.placeUnited Kingdom-

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