Validation of the thermal equilibrium assumption in periodic free convection in porous channel using Darcy-Brinkman Forchheimer model

dc.contributor.authorAwad, M.M.
dc.contributor.authorTahat, M.S.
dc.contributor.authorKhadrawi, A.F.
dc.date.accessioned2015-04-24T08:21:57Z
dc.date.available2015-04-24T08:21:57Z
dc.date.issued2012
dc.description.abstractPaper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.en_ZA
dc.description.abstractExamination of the thermal equilibrium assumption in the periodic natural convection channel flow is investigated numerically. The periodic disturbance in the free convection flow is due to a periodic thermal disturbance imposed on the channel walls. The Darcy-Brinkman-Forchheimer model is used to describe the flow inside the porous channel. A scripted finite element model builder and numerical solver, FlexPDE, is used to solve the equations. Five dimensionless parameters are found to have significant effect on the local thermal equilibrium assumption. These parameters are thermal conductivity, volumetric Nusselt number, thermal diffusivity ratio, amplitude of thermal disturbance and frequency of the thermal disturbance. The effects of these parameters on the local thermal equilibrium assumption are investigated. The volumetric Nusselt number is found to have the most significant effect on this assumption.en_ZA
dc.description.librariandc2014en_ZA
dc.format.extent12 pagesen_ZA
dc.format.mediumPDFen_ZA
dc.identifier.citationAwad, MM, Tahat, MS & Khadrawi, AF 2012, Validation of the thermal equilibrium assumption in periodic free convection in porous channel using Darcy-Brinkman Forchheimer model, Paper presented to the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.en_ZA
dc.identifier.isbn9781868549863
dc.identifier.urihttp://hdl.handle.net/2263/44766
dc.language.isoenen_ZA
dc.publisherInternational Conference on Heat Transfer, Fluid Mechanics and Thermodynamicsen_ZA
dc.relation.ispartofHEFAT 2012en_US
dc.rightsUniversity of Pretoriaen_ZA
dc.subjectThermal equilibriumen_ZA
dc.subjectNatural convection channel flowen_ZA
dc.subjectFree convection flowen_ZA
dc.subjectPorous channelen_ZA
dc.subjectFlexPDEen_ZA
dc.subjectNusselt numberen_ZA
dc.subjectThermal diffusivity ratioen_ZA
dc.titleValidation of the thermal equilibrium assumption in periodic free convection in porous channel using Darcy-Brinkman Forchheimer modelen_ZA
dc.typePresentationen_ZA

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