Title of article
Numericalsimulationofflowsintight-latticefuelbundlesOriginalResearchArticle
Author/Authors
E.Merzari، نويسنده , , H.Ninokata، نويسنده , , E.Baglietto، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
17
From page
1703
To page
1719
Abstract
Theflowintightrodbundlesischaracterizedbylong-term,large-scalecoherentpatternsinthestream-wisedirection.
Inthepresentwork,theissueofsimulatingthesestructuresthroughunsteadyCFDsimulationsemployingperiodicboundaryconditionsinthestream-wisedirection,willbeaddressed.Thevalidityoftheapproachisassessedthroughthecomparisonofalargeeddysimulation(LES)forsimilarflowconditionsinsideasimplifiedgeometryandexperimentaldata.
Apowerfulstatisticaltool(properorthonormaldecomposition)isusedtoanalyzethetimevaryingsolution.Theflowfieldhasbeendecomposedintoaseriesofnormalmodes,identifyingthestructuresresponsiblefortheflowtransferbetweensub-channels.Additionalinsightsonthephysicsofthesecoherentstructuresareobtained.
AnunsteadyReynoldsaveragedNavier–Stokessimulation(URANS)oftheflowinarodbundlehasthenbeencarriedout.Thecomparisonbetweennumericalresultsandexperimentalresults[Krauss,T.,Meyer,L.,1998.Experimentalinvestigationofturbulenttransportofmomentumandenergyinaheatedrodbundle.Nucl.Eng.Design180,185–206]provesthataccuracycanbeachievedforaveragedstatisticssuchasstream-wisevelocity,turbulentintensityandwallshearstresses.
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2008
Journal title
Nuclear Engineering and Design Eslah
Record number
895128
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