• Title of article

    AmovingsubgridmodelforsimulationofrefloodheattransferOriginalResearchArticle

  • Author/Authors

    CesareFrepoli، نويسنده , , JohnH.Mahaffy، نويسنده , , LawrenceE.Hochreiter، نويسنده ,

  • Issue Information
    روزنامه با شماره پیاپی سال 2003
  • Pages
    18
  • From page
    131
  • To page
    148
  • Abstract
    Inthequenchfrontandfrothregionthethermal-hydraulicparametersexperienceasharpaxialvariation.Theheattransferregimechangesfromsingle-phaseliquid,tonucleateboiling,totransitionboilingandfinallytofilmboilinginasmallaxialdistance. Oneofthemajorlimitationsofallthecurrentbest-estimatecodesisthatarelativelycoarsemeshisusedtosolvethecomplexfluidflowandheattransferprobleminproximityofthequenchfrontduringreflood.Theuseofafineaxialmeshfortheentirecorebecomesprohibitivebecauseofthelargecomputationalcostsinvolved.Moreover,asthemeshsizedecreases,thestandardnumericalmethodsbasedonasemi-implicitscheme,tendtobecomeunstable. Asubgridmodelwasdevelopedtoresolvethecomplexthermal-hydraulicproblematthequenchfrontandfrothregion.ThismodelisaFineHydraulicMovingGrid(FHMG)thatoverliesacoarseEulerianmeshintheproximityofthequenchfrontandfrothregion.Thefinemeshmovesinthecoreandfollowsthequenchfrontasitadvancesinthecorewhiletherodscoolandquench.TheFHMGsoftwarepackagewasdevelopedandimplementedintotheCOBRA-TFcomputercode.ThispaperpresentsthemodelanddiscussespreliminaryresultsobtainedwiththeCOBRA-TF/FHMGcomputercode.
  • Journal title
    Nuclear Engineering and Design Eslah
  • Serial Year
    2003
  • Journal title
    Nuclear Engineering and Design Eslah
  • Record number

    894577

    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=10&DC=894577