analysis of uniform semi-porous heat sink …

analysis of uniform semi-porous heat sink …

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1、ANANALYSISOFPOROUSMEDIAHEATSINKSFORNATURALCONVECTIONCOOLEDMICROELECTRONICSYSTEMS.byEricR.SaveryEngineeringProjectsubmittedinpartialfulfillmentoftherequirementsforthedegreeofMasterofEngineeringinMechanicalEngineeringApprovedbyErnestoGutierrez-Miravete,EngineeringProjectAdvisorRensselaerPoly

2、technicInstituteHartford,ConnecticutDecember,2011viTableofContents:ListofTablesiiiListofFiguresivNomenclaturevAbstractvi1.Introduction13.Methodology/Approach53.1.Assumptions53.2.Theory63.3.FiniteElementModeling104.ResultsandDiscussion145.Conclusion266.Appendix1277.Appendix2288.Appendix3299

3、.Appendix43010.Reference31viListofTablesTable1:PorousHeatSinkCharacteristics12Table2:BlockForm12Table3:ControlBlockHeatSinkResults14Table4:PorousHeatSinkResults18Table5:NumberofElementforMeshSetting25viListofFiguresFigure1:FinHeatSink21Figure2:SchematicRepresentationofMicroelectronicHeatSi

4、nk2Figure3:NoHeatSink3Figure4:SolidBlockHeatSink3Figure5:PorousHeatSink4Figure6:SchematicRepresentationofsystem5Figure7:Temperaturevs.Density7Figure8:DifferentPorosity,SamePermeability8Figure9:SamePorosity,DifferentPermeability9Figure10:NoHeatSinkMesh13Figure11:SolidBlockMesh13Figure12:Por

5、ousBlockMesh13Figure13:NoHeatSinkT-V(IsothermsandVelocityVectors)15Figure14:SolidHeatSinkT-V(IsothermsandVelocityVectors)15Figure15:PorousHeatSinkIsothermsandVelocityField16Figure16:PorousHeatSinkStreamlinesandVelocityMagnitude17Figure17:EffectofPorosityEffectonHeatRemoval19Figure18:Permea

6、bilityEffectonHeatTransfer20Figure19:PermeabilityEffectonVolumetricFlowRate21Figure20:EffectofPermeabilityonTotalHeatFlux22Figure21:EffectofPermeabilityonVolumeFlowRate22Figure22:EffectofMeshonHeatRemovalRate24Figure23:EffectofMeshonVolumetricFlowRate24viNomenclatureSymbolsCp=J/kgK=HeatCap

7、acityatConstantPressureK=m^2=Permeabilityρ=g/m^3=Densityε=-=Porosityϕ=W/m^2=HeatFluxP=N/m^2=PressureT=K=Temperaturek=W/(m*K)=ThermalConductivityu=m/s=FluidVelocityg=m/s^2=Gravityt=sec=Timev=m/s=VelocityFieldμ=N*s/m^2=FluidViscositySubscriptsAir=AirAl=AluminumH

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