heat and mass transfer - upm传热和传质-芬欧汇川集团

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1、HeatandmasstransferWhyheatandmasstransfer1Fundamentalsofheattransfer(whatisit)2Thermodynamicsofheattransfer3Physicaltransportphenomena4Thermalconductivity5Heatequation8Modellingspace,timeandequations9Casestudies10Nomenclaturerefresh10Objectivesofheattrans

2、fer(whatfor)11Relaxationtime12Conductiondrivencase(convectiondominates)12Convectiondrivencase(conductiondominates)13Heatflux14Temperaturefield15Dimensioningforthermaldesign16Procedures(howitisdone)17Thermaldesign17Thermalanalysis18Mathematicalmodelling18M

3、odellingthegeometry19Modellingmaterialsproperties20Modellingtheheatequations21Analysisofresults21Modellingheatconduction(.doc)22Modellingmassdiffusion(.doc)22Modellingheatandmassconvection(.doc)22Modellingthermalradiation22Generalequationsofphysico-chemic

4、alprocesses(.doc)22WHYHEATANDMASSTRANSFERHeattransferandmasstransferarekineticprocessesthatmayoccurandbestudiedseparatelyorjointly.Studyingthemapartissimpler,butbothprocessesaremodelledbysimilarmathematicalequationsinthecaseofdiffusionandconvection(therei

5、snomass-transfersimilaritytoheatradiation),anditisthusmoreefficienttoconsiderthemjointly.Besides,heatandmasstransfermustbejointlyconsideredinsomecaseslikeevaporativecoolingandablation.Theusualwaytomakethebestofbothapproachesistofirstconsiderheattransferwi

6、thoutmasstransfer,andpresentatalaterstageabriefingofsimilaritiesanddifferencesbetweenheattransferandmasstransfer,withsomespecificexamplesofmasstransferapplications.Followingthatprocedure,weforgetforthemomentaboutmasstransfer(dealtwithseparatelyunderMassTr

7、ansfer),andconcentrateonthesimplerproblemofheattransfer.Therearecomplexproblemswhereheatandmasstransferprocessesarecombinedwithchemicalreactions,asincombustion;butmanytimesthechemicalprocessissofastorsoslowthatitcanbedecoupledandconsideredapart,asintheimp

8、ortantdiffusion-controlledcombustionproblemsofgas-fueljets,andcondensedfuels(dropsandparticles),whicharecoveredunderCombustionkinetics.Littleismentionedhereaboutheattransferinthemicrometricrangeandbelow,oraboutbiome