人的传热系数

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1、TRANSACTIONONCONTROLANDMECHANICALSYSTEMS,VOL.1,NO.8,PP.362-369,DEC.,2012.DeterminingNaturalConvectionHeatTransferCoefficientofHumanBodyAhmadNajjaranAbstract:Inthispaper,theaimisobtainingconvectionanalyticalsimulationtheseconditionswouldsetasaninput.coefficientofhumanbody.At

2、firsta3DhumanbodyhasbeenAlsoduetocalculatinguptosomedecimals,theaccuracydesignedbyunstructuredgrids.Feetandhandsarestretchedofthecalculatingismuchmorethantheexperimentalcompletelyinconsideredsample.Twosegments(standingandmeasurementswhichhavelimitations.Insomestudiessupine)

3、areconsideredforbody.Solesandthebackofentireconvectionheattransfercoefficientisdeterminedbyusingbodyareconsideredincontactwiththegroundrespectivelyintheratioofaspecificsurfaceareatotheentirebodyareathesesegments.Otherpartsofhumanbodyareexposedtosurroundingair.Theheattransfe

4、randthebodytemperatureandbyuseofthelocalcoefficient.Inmostofthesestudiesareassumedsteadyandconstant.Theresultsareobtainedbytheaccuracyoftheresultsisdecreasedbecauseofignoringapplyingfinitevolumemethodforeachgridandextractedbysurfaceswhichdon’thaveanyconvectionheattransferwi

5、ththeweightedareamethod.Thentheattainedresultsaresurroundingair.Thenaturalconvectioncoefficientisvalidatedwiththerecentexperimentalresults.Goodcalculatedinexperimentalresearchrelatedtotemperatureagreementisobservedbetweentheobtainedresultsandthedifferencewhichiscorrectedbyw

6、eightedareamethod.Ofpreviousexperimentalresults.Finallytwoformulasarecourseinthismethod,therelationbetweenheattransferderivedfornaturalconvectioncoefficientofhumanbody.coefficientwithheatfluxandtemperaturedifferenceisassumedtobelinear[2].In1996Dear[36]calculatedthisKeywords

7、:ConvectionHeatTransferCoefficient,Standing,Supine,coefficientinapaperwiththesamecontent.ButheHumanBody,NumericalSimulationdeterminedthecoefficientforeachpartofthebodyseparatelyandinthelimitednumber.1.IInpreviousstudies,heattransferofthebodyhasbeenNTRODUCTIONdeterminedexper

8、imentallybyuseofthesimplethermalTheforcedconvectionprocess,isaprocessinwhichequipm