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An overview on heat transfer augmentation using vortex generators and nanofluids: Approaches and applications

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dc.citedby150
dc.contributor.authorAhmed H.E.en_US
dc.contributor.authorMohammed H.A.en_US
dc.contributor.authorYusoff M.Z.en_US
dc.contributor.authorid54789424300en_US
dc.contributor.authorid15837504600en_US
dc.contributor.authorid7003976733en_US
dc.date.accessioned2023-12-29T07:46:29Z
dc.date.available2023-12-29T07:46:29Z
dc.date.issued2012
dc.description.abstractThe subject of heat transfer enhancement has significant interest to develop the compact heat exchangers in order to obtain a high efficiency, low cost, light weight, and size as small as possible. Therefore, energy cost and environmental considerations are going on to encourage attempts to invent better performance over the existence designs. Streamwise vortices can be generated using small flow manipulators or protrusions such as wings and winglets configurations. Single-pair, single row, or two dimensional array of vortex generators (VGs) can be punched, mounted, attached or embedded in the boundary layer of flow channel. VGs generate longitudinal and transverse vortices, while longitudinal vortices are more efficient for heat transfer enhancement than transverse vortices. A dramatic augmentation in thermal performance of the thermal system can be achieved but pressure drop penalty is existed. Several parameters have been overviewed in this paper, which have pronounced effect on the convective heat transfer coefficient and pressure drop penalty. These parameters are: attack angle of VG, geometry of VG, standard and novel types of VG, spacing between the VG tips, number of pairs of VGs in the flow direction, rectangular or circular array arrangement of VGs, common-flow upper (CFU) or common-flow down (CFD) configuration of VG, pointing up (PU) or pointing down (PD) arrangement of VG with flow direction, Re number, channel aspect ratio, number of tubes of fin-tube heat exchanges (HE), circular or oval tubes of fin-tube HE, and location of VG respect to the tube of HE or from leading edge of the channel. This paper gives an overview about the early studies done in order to improve the performance of thermal systems with minimal pressure losses to derive systems with less negative impact on the environment and high level of energy economic. This study also provides an outlook for future work using nanofluids with vortex generators. This article is also summarizes the recent experimental and numerical developments on the thermal conductivity measurements of nanofluids, thermal conductivity enhancement, convection and conduction heat transfer, some applications, main problems and suggestions for future works. � 2012 Elsevier Ltd.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1016/j.rser.2012.06.003
dc.identifier.epage5993
dc.identifier.issue8
dc.identifier.scopus2-s2.0-84864807398
dc.identifier.spage5951
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84864807398&doi=10.1016%2fj.rser.2012.06.003&partnerID=40&md5=ef712f5e915f055c1de35e32ecb4af7c
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/30301
dc.identifier.volume16
dc.pagecount42
dc.sourceScopus
dc.sourcetitleRenewable and Sustainable Energy Reviews
dc.subjectApplications
dc.subjectHeat transfer augmentation
dc.subjectNanofluids
dc.subjectVortex generators
dc.subjectApplications
dc.subjectAspect ratio
dc.subjectFins (heat exchange)
dc.subjectHeat exchangers
dc.subjectHeat transfer coefficients
dc.subjectNanofluidics
dc.subjectPressure drop
dc.subjectTransport aircraft
dc.subjectTubes (components)
dc.subjectVortex flow
dc.subjectAttack angle
dc.subjectCircular arrays
dc.subjectCompact heat exchanger
dc.subjectConvection and conduction
dc.subjectConvective heat transfer Coefficient
dc.subjectEnergy cost
dc.subjectEnergy economics
dc.subjectEnvironmental considerations
dc.subjectFlow channels
dc.subjectFlow direction
dc.subjectHeat exchange
dc.subjectHeat transfer augmentation
dc.subjectHeat Transfer enhancement
dc.subjectImpact on the environment
dc.subjectLeading edge
dc.subjectLight weight
dc.subjectLongitudinal vortices
dc.subjectLow costs
dc.subjectNanofluids
dc.subjectOval tube
dc.subjectPressure loss
dc.subjectRe numbers
dc.subjectStreamwise vortices
dc.subjectThermal conductivity enhancement
dc.subjectThermal conductivity measurements
dc.subjectThermal Performance
dc.subjectThermal systems
dc.subjectTransverse vortex
dc.subjectTwo-dimensional arrays
dc.subjectVortex generators
dc.subjectThermal conductivity of liquids
dc.titleAn overview on heat transfer augmentation using vortex generators and nanofluids: Approaches and applicationsen_US
dc.typeReviewen_US
dspace.entity.typePublication
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