Title of article :
AunifiedmodelconsideringforcebalancesfordepartingvapourbubblesandpopulationbalanceinsubcooledboilingflowOriginalResearchArticle
Author/Authors :
G.H.Yeoh، نويسنده , , J.Y.Tu، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Abstract :
Populationbalanceequationscombinedwithathree-dimensionaltwo-fluidmodelareemployedtopredictsubcooledboilingflowatlowpressureinaverticalannularchannel.TheMUltiple-SIze-Group(MUSIG)modelimplementedinCFX4.4isextendedtoaccountforthewallnucleationandcondensationinthesubcooledboilingregime.Amodelconsideringtheforcesactingondepartingbubblesattheheatedsurfaceisformulated.Thismodelprovidesthecapacityofcomplexanalysesonthebubblegrowthanddepartureforawiderangeofwallheatfluxesandflowconditions.
Comparisonofmodelpredictionsagainstlocalmeasurementsismadeforthevoidfraction,bubbleSautermeandiameterandgasandliquidvelocitiescoveringarangeofdifferentmassandheatfluxesandinletsubcoolings.Goodagreementisachievedwiththelocalradialvoidfraction,bubbleSautermeandiameterandliquidvelocityprofilesagainstmeasurements.However,significantweaknessofthemodelisevidencedinthepredictionofthevapourvelocity.WorkisinprogresstocircumventthedeficiencyoftheMUSIGboilingmodelbytheconsiderationofadditionalmomentumequationstobetterrepresentthemomentumforcesactingontherangeofbubblesizesinthebulksubcooledliquid.
Journal title :
Nuclear Engineering and Design Eslah
Journal title :
Nuclear Engineering and Design Eslah
