Title of article
ModellingandcomputationofcavitationandboilingbubblyflowswiththeNEPTUNE_CFDcodeOriginalResearchArticle
Author/Authors
S.Mimouni، نويسنده , , Boucker، M. نويسنده , , J.Laviéville، نويسنده , , A.Guelfi، نويسنده , , Bestion، D. نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
13
From page
680
To page
692
Abstract
ThispaperfocusesonthemodellingandthenumericalsimulationwiththeNEPTUNE_CFDcodeofcavitationphenomenaandboilingbubblyflows.
Compressible,unsteady,turbulent3Dtwo-phaseflowiscomputedbytheNEPTUNE_CFDsolver,developedjointlybyEDFR&DandCEA.Thenumericalapproachisbasedonafinite-volumeco-locatedcell-centredapproachandmakesuseofanoriginalpressure-basedmulti-fieldcouplingalgorithm[Mechitoua,N.,etal.,2003.Anunstructuredfinitevolumesolverfortwo-phasewater/vapourflowsmodellingbasedonanellipticorientedfractionalstepmethod.In:Proceedingsofthe10thInternationalTopicalMeetingonNuclearReactorThermal-Hydraulics(NURETH10),Seoul,Korea].
Thecavitationnucleicomefromwallnucleationorarepre-existingintheflow.Generatedvaporbubblesareadvectedbytheflowandexpandintheregionswherethelocalpressureisbelowthesaturationwithatendencytoagglomerateintoslugbubbles.
Themodelpredictionscomparedwithexperimentaldataonenoughselectivelocalvariablesshowedthatsatisfactoryagreementcouldbeobtainedwithoutanyfloatingparametertofitthedata.
Thesecondpartofthepaperdealswithboilingbubblyflowthroughamixingdevicerepresentingtheeffectofafuelassemblyspacergridequippedwithmixingblades(DEBORA-mixingexperiment,CEA,Grenoble).Localmeasurementsofthevoidfractionareprovideddownstreamthemixingenhancer.Thecomputationscomparefavourablywiththeexperimentalresults;inparticular,theglobaleffectofthemixingbladeswasobserved.Amodificationoftheclassicalnucleateboilingmodelisproposedtoovercomethestrongmodelsensitivitywithrespecttonearwallgridrefinement.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895040
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