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Article: Turbulent plane couette flow and scalar transport at low Reynolds number

TitleTurbulent plane couette flow and scalar transport at low Reynolds number
Authors
KeywordsComputational
Finite element
Heat transfer
Turbulence
Issue Date2003
PublisherA S M E International. The Journal's web site is located at http://ojps.aip.org/ASMEJournals/HeatTransfer
Citation
Journal Of Heat Transfer, 2003, v. 125 n. 6, p. 988-998 How to Cite?
AbstractThe turbulence structure and passive scalar (heat) transport in plane Couette flow at Reynolds number equal to 3000 (based on the relative speed and distance between the walls) are studied using direct numerical simulation (DNS). The numerical model is a three-dimensional trilinear Galerkin finite element code. It is found that the structures of the mean velocity and temperature in plane Couette flow are similar to those in forced channel flow, but the empirical coefficients are different. The total (turbulent and viscous) shear stress and total (turbulent and conductive) heat flux are constant throughout the channel. The locations of maximum root-mean-square streamwise velocity and temperature fluctuations are close to the walls, while the location of maximum root-mean-square spanwise and vertical velocity fluctuations are at the channel center. The correlation coefficients between velocities and temperature are fairly constant in the center core of the channel. In particular, the streamwise velocity is highly correlated with temperature (correlation coefficient ≈ -0.9). At the channel center, the turbulence production is unable to counterbalance the dissipation, in which the diffusion terms (both turbulent and viscous) bring turbulent kinetic energy from the near-wall regions toward the channel center. The snapshots of the DNS database help explain the nature of the correlation coefficients. The elongated wall streaks for both streamwise velocity and temperature in the viscous sublayer are well simulated. Moreover, the current DNS shows organized large-scale eddies (secondary rotations) perpendicular to the direction of mean flow at the channel center.
Persistent Identifierhttp://hdl.handle.net/10722/76092
ISSN
2015 Impact Factor: 1.723
2015 SCImago Journal Rankings: 1.024
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLiu, CHen_HK
dc.date.accessioned2010-09-06T07:17:34Z-
dc.date.available2010-09-06T07:17:34Z-
dc.date.issued2003en_HK
dc.identifier.citationJournal Of Heat Transfer, 2003, v. 125 n. 6, p. 988-998en_HK
dc.identifier.issn0022-1481en_HK
dc.identifier.urihttp://hdl.handle.net/10722/76092-
dc.description.abstractThe turbulence structure and passive scalar (heat) transport in plane Couette flow at Reynolds number equal to 3000 (based on the relative speed and distance between the walls) are studied using direct numerical simulation (DNS). The numerical model is a three-dimensional trilinear Galerkin finite element code. It is found that the structures of the mean velocity and temperature in plane Couette flow are similar to those in forced channel flow, but the empirical coefficients are different. The total (turbulent and viscous) shear stress and total (turbulent and conductive) heat flux are constant throughout the channel. The locations of maximum root-mean-square streamwise velocity and temperature fluctuations are close to the walls, while the location of maximum root-mean-square spanwise and vertical velocity fluctuations are at the channel center. The correlation coefficients between velocities and temperature are fairly constant in the center core of the channel. In particular, the streamwise velocity is highly correlated with temperature (correlation coefficient ≈ -0.9). At the channel center, the turbulence production is unable to counterbalance the dissipation, in which the diffusion terms (both turbulent and viscous) bring turbulent kinetic energy from the near-wall regions toward the channel center. The snapshots of the DNS database help explain the nature of the correlation coefficients. The elongated wall streaks for both streamwise velocity and temperature in the viscous sublayer are well simulated. Moreover, the current DNS shows organized large-scale eddies (secondary rotations) perpendicular to the direction of mean flow at the channel center.en_HK
dc.languageengen_HK
dc.publisherA S M E International. The Journal's web site is located at http://ojps.aip.org/ASMEJournals/HeatTransferen_HK
dc.relation.ispartofJournal of Heat Transferen_HK
dc.rightsThe Journal of Heart and Lung Transplantation. Copyright © Elsevier Inc.en_HK
dc.subjectComputationalen_HK
dc.subjectFinite elementen_HK
dc.subjectHeat transferen_HK
dc.subjectTurbulenceen_HK
dc.titleTurbulent plane couette flow and scalar transport at low Reynolds numberen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1053-2498&volume=125&spage=988&epage=998&date=2003&atitle=Turbulent+plane+couette+flow+and+scalar+transport+at+low+reynolds+numberen_HK
dc.identifier.emailLiu, CH:chliu@hkucc.hku.hken_HK
dc.identifier.authorityLiu, CH=rp00152en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1115/1.1571084en_HK
dc.identifier.scopuseid_2-s2.0-0347915851en_HK
dc.identifier.hkuros89766en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0347915851&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume125en_HK
dc.identifier.issue6en_HK
dc.identifier.spage988en_HK
dc.identifier.epage998en_HK
dc.identifier.isiWOS:000186989800003-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLiu, CH=36065161300en_HK

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