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1、ManaliShukla&FatemehHassanipourHeatTransferinPorousMediaWithSlurryofPhaseChangeMaterialsManaliShuklamanali.shukla@utdallas.eduGraduateStudent,DepartmentofMechanicalEngineering,UniversityofTexasatDallasRichardson,75080,USAFatemehHassanipourfatemeh@utdallas.eduAssistantProfessor,Departm
2、entofMechanicalEngineering,UniversityofTexasatDallasRichardson,75080,USAAbstract3-Dlaminarmodelofarectangularporouschannelwithhighthermalconductivityandconstantwallheatfluxischosentoinvestigatetheenhancementofheattransferwhenusedinconjunctionwiththephasechangematerialslurry.Numericals
3、imulationsforvariouswallheatfluxesandinletvelocitiesarecarriedout.Theslurryconsistsofmicroencapsulatedoctadecane(C18H38)andwater.Theheattransfercoefficientoftheporouschannelwithpurewaterandwithmicro-encapsulatedphasechangematerialarecalculatedandcompared.Theeffectofporosityandpermeabi
4、lityoftheporousmediumontheheattransfercoefficientwhileusingslurryofphasechangematerialarestudied.Theresultsshowthattheheattransfercoefficientoftheporouschannelcanimprovebyintroducingphasechangematerialslurry,butonlyundercertainheatfluxes,inletvelocities,andporousmediaproperties.Keywor
5、ds:PorousMedia,PhaseChangeMaterial,ForcedConvectionHeatTransfer1.INTRODUCTIONThereisagrowingneedtodevelopsystemswithhighrateofheatdissipationinmanyindustrialproducts,includingelectroniccoolingpackages,airconditioningandrefrigerationsystems.Recently,particulateflowofphase-changemateria
6、lshasattractedattentionforenhancingtheheattransferrate.Encapsulatedphase-changematerialsareattractiveduetotheirhighenergystoragedensityandsmalltemperaturevariationduringtheheattransfer.Therearevariousphase-changematerials,e.g.paraffin,fibers,foamsandcompositeswhicharedevelopedtoenhanc
7、ethermalefficiencyascoolants,whenusedinconjunctionwithotherfluids[14].Forcedconvectiveheattransferenhancementwithmicro-encapsulatedphasechangematerial(MCPCM)slurrieshavebeeninvestigatedexperimentallyandnumerically[511].ThesestudiesshowthattheheattransfercoefficientsmeasuredforMCPCMslu
8、rryar
