Mixed convection of power-law fluids in cylindrical enclosures with a cold rotating top cover and a stationary heated bottom wall

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dc.authorid0000-0003-3421-2020en_US
dc.contributor.authorTuran, Osman
dc.contributor.authorYigit, Sahin
dc.contributor.authorChakraborty, Nilanjan
dc.date.accessioned2021-03-20T20:09:21Z
dc.date.available2021-03-20T20:09:21Z
dc.date.issued2020
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Makine Mühendisliği Bölümüen_US
dc.description.abstractSteady-state laminar mixed convection in cylinders with a rotating top cold cover and a heated bottom has been numerically analysed for inelastic shear-thinning/shear-thickening fluids by applying power-law model of viscosity. In this analysis, axisymmetric incompressible flow simulations have been conducted for a range of different values of Reynolds, Richardson, Prandtl numbers (i.e. 500 <= Re <= 2000; 0 <= Ri <= 1.0; 10 <= Pr <= 1000) and power-law index (i.e. 0.6 n 1.8) for an aspect ratio (height/radius) of unity (i.e. AR = 1.0). The thermal convective transport has been found to strengthen with increasing Re and Pr, which in turn gives rise to an increase in the mean Nusselt number Nu. By contrast, an increase in Ri leads to a mild increase in Nu for small Richardson number values but Nu becomes insensitive to the changes in Ri for large Richardson numbers within the range of 0 <= Ri <= 1.0 for all values of n considered here. The mean Nusselt number Nu exhibits a nonmonotonic trend (i.e. increases before reaching a maximum followed by a decreasing trend) with the variation of n. The influences of Ra, Pr and Ri on the mean Nusselt number Nu have been explained in terms of scaling arguments. The scaling relations along with the numerical findings have been utilised to propose a correlation for the mean Nusselt number for the configuration and the parameter range considered here.en_US
dc.description.sponsorshipNewton Research Collaboration Programmeen_US
dc.description.sponsorshipThe authors are grateful to Mr. X. Chen for his help with the simulations. This study was supported by the Newton Research Collaboration Programme and is hereby gratefully acknowledged.en_US
dc.identifier.doi10.1016/j.tsep.2020.100541en_US
dc.identifier.issn2451-9049
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttp://doi.org/10.1016/j.tsep.2020.100541
dc.identifier.urihttps://hdl.handle.net/20.500.12885/383
dc.identifier.volume18en_US
dc.identifier.wosWOS:000621593000032en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorTuran, Osman
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofThermal Science And Engineering Progressen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectMixed convectionen_US
dc.subjectPower-law fluiden_US
dc.subjectRotating end wallen_US
dc.subjectRichardson numberen_US
dc.subjectPrandtl numberen_US
dc.titleMixed convection of power-law fluids in cylindrical enclosures with a cold rotating top cover and a stationary heated bottom wallen_US
dc.typeArticleen_US

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