Title of article :
InvestigationoncondensationinpresenceofanoncondensablegasforawiderangeofReynoldsnumberOriginalResearchArticle
Author/Authors :
N.KMaheshwari، نويسنده , , DSaha، نويسنده , , R.KSinha، نويسنده , , MAritomi، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Abstract :
Atheoreticalmodelhasbeendevelopedtostudythelocalheattransfercoefficientofacondensingvapourinthepresenceofanoncondensablegas,wherethegas/vapourmixtureisflowingdownwardinsideaverticaltube.Thetwo-phaseheattransferisanalysedusinganannularflowpatternwithaliquidfilmatthetubewallandaturbulentgas/vapourcore.Thegas/vapourcoreismodeledusingtheanalogybetweenheatandmasstransfer.ThemodelincorporatesNusseltequationwithMcAdamsmodifierandBlangettimodelforcalculatingthefilmheattransfercoefficient,MoodyandWalliscorrelationstoaccountforfilmwavinesseffectongas/vapourboundarylayer.Thesuctioneffectduetocondensation,developingflowandpropertyvariationofthegasphaseisalsoconsidered.Acomparativestudyofheattransfercoefficientandvapourmassflowratehasbeenmadewithvariousmodelstoaccountforcondensatefilmresistanceandcondensatefilmroughness.ResultsshowthatforveryhighReynoldsnumber,thecondensationheattransfercoefficientishigherthanthefilmheattransfercoefficient.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
