Conjugate mixed convection of nanofluid in a cubic enclosure separated with a conductive plate and having an inner rotating cylinder

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dc.contributor.authorSelimefendigil F.
dc.contributor.authorÖztop H.F.
dc.date.accessioned2024-07-22T08:08:33Z
dc.date.available2024-07-22T08:08:33Z
dc.date.issued2019
dc.description.abstractIn this study, convective heat transfer features of CNT-water nanofluid in a three dimensional cubic enclosure which is separated by a conductive partition and having an inner rotating adiabatic circular cylinder were examined. Numerical simulations were performed with Galerkin weighted residual finite element method. Various values of Richardson number of the left cavity (between 0.01 and 100), angular rotational speed of the inner cylinder (between −34724 and 34724), vertical (between 0.25 and 0.75)and horizontal (between 0.1 and 0.3)locations of the cylinder, thickness (between 0.01 and 0.2)and thermal conductivity ratio (between 0.1 and 100)of the conductive partition and nanoparticle volume fraction (between 0 and 0.03)on the fluid flow and heat transfer were analyzed. It was observed that the average heat transfer enhances for higher values of Richardson number, angular rotational speed of the cylinder (generally in both directions), solid particle volume fraction of nanofluid and thermal conductivity of the partition. The rate of enhancement are in the range of 11–14% when configurations with the lowest and highest values of Richardson number are considered whereas 18% of enhancement is attained at the highest rotational speed of the cylinder as compared to motionless cylinder configuration. The enhancements in the average Nusselt numbers with the inclusion of the CNT-nanoparticle at the highest solid volume fraction are in the range of 82% and 90% as compared to water. The average heat transfer coefficient is estimated by using POD and interpolation among POD modes and modal coefficients which is found to be computationally inexpensive and the method produces accurate results as compared to high fidelity three dimensional intensive computational fluid dynamics simulations. © 2019 Elsevier Ltd
dc.identifier.DOI-ID10.1016/j.ijheatmasstransfer.2019.05.053
dc.identifier.issn00179310
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/14444
dc.language.isoEnglish
dc.publisherElsevier Ltd
dc.subjectCircular cylinders
dc.subjectComputational fluid dynamics
dc.subjectEnclosures
dc.subjectFinite element method
dc.subjectFlow of fluids
dc.subjectMixed convection
dc.subjectNanoparticles
dc.subjectNumerical methods
dc.subjectThermal conductivity of liquids
dc.subjectThermal conductivity of solids
dc.subjectVolume fraction
dc.subjectComputational fluid dynamics simulations
dc.subjectConjugate heat transfer
dc.subjectFluid flow and heat transfers
dc.subjectNanofluids
dc.subjectNanoparticle volume fractions
dc.subjectRotating cylinders
dc.subjectThermal conductivity ratio
dc.subjectThree-dimensional cubic enclosure
dc.subjectNanofluidics
dc.titleConjugate mixed convection of nanofluid in a cubic enclosure separated with a conductive plate and having an inner rotating cylinder
dc.typeArticle

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