Title of article
CFDanalysisofthermal–hydraulicbehaviorofheavyliquidmetalsinsub-channelsOriginalResearchArticle
Author/Authors
X.Cheng، نويسنده , , N.I.Tak، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2006
Pages
12
From page
1874
To page
1885
Abstract
CFDanalysiswascarriedoutforthermal–hydraulicbehaviorofheavyliquidmetalflows,especiallylead–bismutheutectic,insub-channelsofbothtriangularandsquarelattices.Effectofvariousparameters,e.g.turbulencemodelsandpitch-to-diameterratio,onthethermal–hydraulicbehaviorwasinvestigated.Amongtheturbulencemodelsselected,onlythesecondorderclosureturbulencemodelsreproducethesecondaryflow.Fortheentireparameterrangestudiedinthispaper,theamplitudeofthesecondaryflowislessthan1%ofthemeanflow.Astronganisotropicbehaviorofturbulenceisobserved.Theturbulencebehaviorissimilarinbothtriangularandsquarelattices.Theaverageamplitudeoftheturbulentvelocityfluctuationacrossthegapisabouthalfoftheshearvelocity.ItisonlyweaklydependentonReynoldsnumberandpitch-to-diameterratio.Astrongcircumferentialnon-uniformityofheattransferisobservedintightrodbundles,especiallyinsquarelattices.RelatedtotheoverallaverageNusseltnumber,CFDcodesgivesimilarresultsforbothtriangularandsquarerodbundles.ComparisonoftheCFDresultswithbundletestdatainmercuryindicatesthattheturbulentPrandtlnumberforHLMflowsinrodbundlesiscloseto1.0athighPecletnumberconditions,andincreasesbydecreasingPecletnumber.Basedonthepresentresults,the
Journal title
Nuclear Engineering and Design Eslah
Serial Year
2006
Journal title
Nuclear Engineering and Design Eslah
Record number
941307
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