Numerical and optimization study ofmixed convection due to a rotating cylinder in a porous cavity

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dc.contributor.authorSelimefendigil F.
dc.contributor.authorÖztop H.F.
dc.date.accessioned2024-07-22T08:10:14Z
dc.date.available2024-07-22T08:10:14Z
dc.date.issued2018
dc.description.abstractIn this study, numerical study and optimization for a mixed convection in a porous cavity due to an inner rotating cylinder were performed by using the Galerkin weighted residual finite element method. An optimum circular cylinder size that maximizes average heat transfer along the hot wall was determined, and numerical simulation was performed for various values of Rayleigh number (between 104 and 106), angular rotational velocity of a circular cylinder (between -0.001 and 0.01), Darcy number (between 10-5 and 10-2), and porosity of the porous medium (between 0.25 and 0.5). The rotating cylinder with optimum size was found to have profound effects on the fluid flow and heat transfer characteristics, and 107.20% of heat transfer enhancement is obtained at the highest rotational speed when compared to motionless cylinder configuration. Local and average Nusselt number enhances with higher values of Rayleigh number, angular rotational speed of the cylinder (clockwise rotational direction), porosity, and permeability of the porous medium. Average heat transfer rate along the hot wall increases almost linearly with porosity of the porous medium. The average heat transfer rate versus Darcy number shows a saturated-type nonlinear curve near the step, especially for lower values of Richardson number and Hartmann number. © 2018 by Begell House, Inc. www.begellhouse.com.
dc.identifier.DOI-ID10.1615/JPorMedia.2018021182
dc.identifier.issn1091028X
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/15149
dc.language.isoEnglish
dc.publisherBegell House Inc.
dc.subjectCircular cylinders
dc.subjectCylinder configurations
dc.subjectFinite element method
dc.subjectFlow of fluids
dc.subjectNumerical methods
dc.subjectPorosity
dc.subjectPorous materials
dc.subjectAverage heat transfers
dc.subjectFluid flow and heat transfers
dc.subjectHeat Transfer enhancement
dc.subjectOptimization studies
dc.subjectPermeability of the porous mediums
dc.subjectPorous medium
dc.subjectRotating cylinders
dc.subjectRotational directions
dc.subjectHeat transfer
dc.titleNumerical and optimization study ofmixed convection due to a rotating cylinder in a porous cavity
dc.typeArticle

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