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Article: Semianalytical SelfSimilar Solution of BentOver Jet in CrossFlow
Title  Semianalytical SelfSimilar Solution of BentOver Jet in CrossFlow 

Authors  
Issue Date  1999 
Publisher  American Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/em.html 
Citation  Journal of Engineering Mechanics, 1999, v. 125 n. 7, p. 733746 How to Cite? 
Abstract  The flow and scalar field in the cross section of a bentover momentum jet in crossflow has been investigated via a 2D numerical solution of the governing equations with similarity transformation. The semianalytical model employs a free shear layer model for turbulent closure and the assumption of a constant velocity in the direction of the crossflow; the entire solution depends solely on a dimensionless turbulent mixing parameter λ that measures the relative importance of advection and diffusion. The computed streamlines and vorticity field clearly indicate a vortexpair flow for all λ. The shape of the scalar distribution, however, grows from a circular cell to a kidneyshaped double peak structure. Using a value of λ = 55, the computed jet trajectory and spreading and the crosssectional shape are in good agreement with the experiments, although the dilution is somewhat overpredicted. The results suggest a free shear layer model of ε = 0.0272Wml*, where ε, Wm, and l* are the eddy viscosity, maximum velocity, and halfwidth in the bentover jet cross section, respectively. 
Persistent Identifier  http://hdl.handle.net/10722/70977 
ISSN  2015 Impact Factor: 1.346 2015 SCImago Journal Rankings: 0.747 
DC Field  Value  Language 

dc.contributor.author  Lee, JHW   
dc.contributor.author  Li, L   
dc.contributor.author  Cheung, V   
dc.date.accessioned  20100906T06:27:48Z   
dc.date.available  20100906T06:27:48Z   
dc.date.issued  1999   
dc.identifier.citation  Journal of Engineering Mechanics, 1999, v. 125 n. 7, p. 733746   
dc.identifier.issn  07339399   
dc.identifier.uri  http://hdl.handle.net/10722/70977   
dc.description.abstract  The flow and scalar field in the cross section of a bentover momentum jet in crossflow has been investigated via a 2D numerical solution of the governing equations with similarity transformation. The semianalytical model employs a free shear layer model for turbulent closure and the assumption of a constant velocity in the direction of the crossflow; the entire solution depends solely on a dimensionless turbulent mixing parameter λ that measures the relative importance of advection and diffusion. The computed streamlines and vorticity field clearly indicate a vortexpair flow for all λ. The shape of the scalar distribution, however, grows from a circular cell to a kidneyshaped double peak structure. Using a value of λ = 55, the computed jet trajectory and spreading and the crosssectional shape are in good agreement with the experiments, although the dilution is somewhat overpredicted. The results suggest a free shear layer model of ε = 0.0272Wml*, where ε, Wm, and l* are the eddy viscosity, maximum velocity, and halfwidth in the bentover jet cross section, respectively.   
dc.language  eng   
dc.publisher  American Society of Civil Engineers. The Journal's web site is located at http://www.pubs.asce.org/journals/em.html   
dc.relation.ispartof  Journal of Engineering Mechanics   
dc.rights  Journal of Engineering Mechanics. Copyright © American Society of Civil Engineers.   
dc.title  Semianalytical SelfSimilar Solution of BentOver Jet in CrossFlow   
dc.type  Article   
dc.identifier.openurl  http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=07339399&volume=125&spage=733 &epage= 746&date=1999&atitle=A+semianalytical+selfsimilar+solution+of+a+bentover+jet+in+crossflow  en_HK 
dc.identifier.email  Lee, JHW: hreclhw@hku.hk   
dc.identifier.authority  Lee, JHW=rp00061   
dc.identifier.doi  10.1061/(ASCE)07339399(1999)125:7(733)   
dc.identifier.hkuros  48266   
dc.identifier.volume  125   
dc.identifier.issue  7   
dc.identifier.spage  733   
dc.identifier.epage  746   
dc.publisher.place  United States   