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Numerical study of turbulent mixed convection of nanofluids in three-dimensional horizontal concentric annuli

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dc.citedby4
dc.contributor.authorAlawi O.A.en_US
dc.contributor.authorSidik N.A.C.en_US
dc.contributor.authorDawood H.K.en_US
dc.contributor.authorid56108584300en_US
dc.contributor.authorid57204852231en_US
dc.contributor.authorid56307856100en_US
dc.date.accessioned2023-05-29T06:01:19Z
dc.date.available2023-05-29T06:01:19Z
dc.date.issued2015
dc.descriptionCylinders (shapes); Finite volume method; Heat flux; Heat transfer; Mixed convection; Nanoparticles; Navier Stokes equations; Reynolds number; Volume fraction; Concentric annuli; Heat transfer characteristics; Hydraulic diameter; Nanofluids; Nanoparticle shape; Numerical results; SIMPLE algorithm; Turbulent mixed convections; Nanofluidicsen_US
dc.description.abstractThree-dimensional turbulent mixed convection flow using nanofluids in horizontal concentric annuli is numerically simulated. The continuity, Navier-Stokes and energy equations are solved using finite volume method (FVM) and the SIMPLE algorithm scheme is applied to examine the effects of turbulent flow on heat transfer characteristics. In this study, several parameters such as different types of nanoparticles (Al2O3, CuO, SiO2 and ZnO), different volume fractions in the range of 1% to 4%, different nanoparticles diameter in the range of 20 to 80 nm were used. Reynolds numbers are considered in the turbulent range of 6000 ?Re ? 18000. Different nanoparticle shapes (i.e., blades, platelets, cylindrical, bricks, and spherical), and effects of inner cylinder and outer cylinder heat fluxes were analyzed. Hydraulic diameter ratio was also examined. The numerical results indicate that the nanofluid with SiO2 has the highest Nusselt number and pressure drop compared with other nanofluids types. Heat transfer characteristic increases as the volume fraction of nanoparticles increases while it decreases as the nanoparticles diameter increases. Effects of hydraulic diameter ratio, nanoparticle shapes and location of applying heat flux on heat transfer characteristics are significant. � 2015 American Scientific Publishers All rights reserved.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1166/jctn.2015.3987
dc.identifier.epage2076
dc.identifier.issue9
dc.identifier.scopus2-s2.0-84946088345
dc.identifier.spage2067
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84946088345&doi=10.1166%2fjctn.2015.3987&partnerID=40&md5=d23948e1f786786bd92dec60697dd6d6
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/22495
dc.identifier.volume12
dc.publisherAmerican Scientific Publishersen_US
dc.sourceScopus
dc.sourcetitleJournal of Computational and Theoretical Nanoscience
dc.titleNumerical study of turbulent mixed convection of nanofluids in three-dimensional horizontal concentric annulien_US
dc.typeArticleen_US
dspace.entity.typePublication
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