Effects of two-phase nanofluid model and localized heat source/sink on natural convection in a square cavity with a solid circular cylinder

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dc.authoridChamkha, Ali/0000-0002-8335-3121
dc.authoridAlsabery, Ammar/0000-0002-2970-6600
dc.contributor.authorAlsabery, Ammar, I
dc.contributor.authorGedik, Engin
dc.contributor.authorChamkha, Ali J.
dc.contributor.authorHashim, Ishak
dc.date.accessioned2024-09-29T15:55:09Z
dc.date.available2024-09-29T15:55:09Z
dc.date.issued2019
dc.departmentKarabük Üniversitesien_US
dc.description.abstractIn the present study, natural convection heat transfer of Al2O3-water nanofluid inside a square cavity with a solid circular cylinder is investigated numerically. For numerical computations, the finite element method is used by taking into consideration Buongiorno's two-phase model. Parts of the vertical surfaces of cavity are kept at constant temperature (left wall T-h and right wall T-c) while the other walls (horizontal walls and the remaining of the vertical walls) are taken as adiabatic. The effects of some pertinent parameters such as the Rayleigh number (10(3) <= Ra <= 10(6)), nanoparticle volume fraction (0 <= phi <= 0.04), thermal conductivity of the solid cylinder (k(w) = 0.28, 0.76, 1.95, 7 and 16), radius of solid cylinder (0.1 <= R <= 0.4), heat source/sink length (0.2 <= D <= 0.8), and the heat source/sink position (0.2 <= B <= 0.8) on the fluid flow and heat transfer characteristics are investigated. The obtained numerical results are depicted graphically and discussed in detail from the point of view of the streamlines, isotherms, nanoparticle volume fractions and the local and average Nusselt number Nu. It is indicated that the heat transfer is enhanced with an increase in the nanoparticle volume fraction for all studied Rayleigh numbers. Furthermore, the thermal conductivity, solid circular cylinder size, D and B parameters are the key factors to control and optimize the heat transfer inside the cavity that is partially heated and cooled. The proposed method is found to be in good agreement between previously published experimental and numerical results. (C) 2018 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipUniversiti Kebangsaan Malaysia (UKM) [DIP-2017-010]en_US
dc.description.sponsorshipThe work was supported by the Universiti Kebangsaan Malaysia (UKM) research grant DIP-2017-010. We thank the respected reviewers for their constructive comments which clearly enhanced the quality of the manuscript.en_US
dc.identifier.doi10.1016/j.cma.2018.09.041
dc.identifier.endpage981en_US
dc.identifier.issn0045-7825
dc.identifier.issn1879-2138
dc.identifier.scopus2-s2.0-85055042324en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage952en_US
dc.identifier.urihttps://doi.org/10.1016/j.cma.2018.09.041
dc.identifier.urihttps://hdl.handle.net/20.500.14619/4497
dc.identifier.volume346en_US
dc.identifier.wosWOS:000456713400041en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofComputer Methods in Applied Mechanics and Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectNatural convectionen_US
dc.subjectThermophoresisen_US
dc.subjectBrownianen_US
dc.subjectSolid cylinderen_US
dc.subjectHeat source/sinken_US
dc.subjectBuongiorno modelen_US
dc.titleEffects of two-phase nanofluid model and localized heat source/sink on natural convection in a square cavity with a solid circular cylinderen_US
dc.typeArticleen_US

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