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1、HeatandMassTransferinPorousMediaForcedConvectiveDryingof3-DMoistObjects:ExperimentalFacilityandCFD-MassTransferModelingVelocityprofileoveramoistobjectInletIsothermsIsothermatt=500secMoistureContentatt=500secMoistObjectConvectivedryingisaprocessofthermallyremov
2、ingvolatileliquidfrommoistobjectssuchasfoodstuffs,ceramicproducts,clayproducts,woodetc.Wearedevelopinga3DheatandmasstransfermodelwhichwillbecoupledtoaCFDcode.ThismodelwillbeabletopredictthedryingtimerequiredfordifferentReynoldsnumbersandotherdryingconditions.A
3、llkindsofobjectscanbemodeledwithdifferentorientationsandpositions.Thesemoistobjectswillbeplacedinfrontofahotanddrystreamofairtopredictthetransientmoisturecontentandtemperaturedistribution.Anexperimentalfacilitywillbebuilttovalidatethenumericalmodeldeveloped.Ra
4、diationinParticipatingMediaRadiationmodelingwithaheatsourceinthreedimensionalenclosureswithconvectiveboundaryconditionRadiativeheattransferinparticipatingmediaisacomplexphenomenon.Weareusingdiscreteordinatesmethodtosolvetheradiativetransferequations.Wehavemode
5、ledaheatsourceofconicalshapetorepresentaflame.Inthewalls,wehaveconsideredaconvectiveboundaryconditionstorepresentthewaterwallinaboiler.358357356)3552354(W/m353wTemperatureprofilesT352atthewallfor351β=0.5β=1differentextinction350β=2β=5coefficient34900.20.40.60.
6、81HeatgenerationzoneZ(m)representingaflameinacombustionchamberIsothermsinacenterplaneIsothermsinthewaterwallFluidflowandHeatTransferininternalflows:EffectofradiationinaflowthroughaparallelplatechannelNoradiation,onlyRadiationandforcedforcedconvectionconvection
7、withanabsorbing-emittinggasMixedconvectioninatriangularductTheblockstructuredgridusedinthesimulation30Ra=0Ra=2E325HeattransferRa=2E4Ra=1E5enhancement20Ra=2E5becauseofbuoyancyRa=1E6forceshowingwithSeries7z15effectofRayleighNunumberRaonlocalNusseltnumber1052.47l
8、ine00.0010.010.11Z/(RePrDh)ContoursofseconderyvelocityprofileataparticularlocationforRa=1E5showingtheeffectofbuoyancyEnhancementofHeatTransferwithporousinsertsEnhancementofcombined
