Author/Authors :
GlenHansen، نويسنده , , SteveOwen، نويسنده ,
Abstract :
Meshgenerationinsupportofnuclearreactorsimulationhasmuchincommonwiththerequirementsofotherapplicationareas,suchascomputationalfluiddynamics(CFD).Indeed,fluiddynamicsanalysisofthecoolantbehaviorinsidethereactorcoreisaninternalflowproblemthatrequirestheresolutionofspatialandtemporalvariationsintheflowcausedbycomplexcomponentconfigurations,fluids/structureinteraction,turbulence,andthermalheatingofthecoolant.Typicalconcernsofmeshingcomplexgeometries;theuseofhexahedralvs.tetrahedralelements,elementgeometricquality,meshsmoothness,useofanisotropicelementsinthethermalboundarylayer,etc.,areallconsiderationsimportanttothereactormeshingproblem.
Reactormeshingbeginstobecomemorespecializedastheneedtoemployreactorsimulationasapredictivedesignandsafetyanalysiscapabilitygrowsinimportance.First,apredictivecapabilitywillrequiremoreprecisephysicalmodelstobeincluded,andthesemodelswillneedtobesupportedbyacomputationalscienceframeworkthatwillallowthemtobeaccuratelyapproximatedbothspatiallyandtemporallyduringthereactorcoreanalysis.Boththemultiphysicalnatureofthecompositereactormodelanddetailsofthephysicsalgorithmsthemselveswillplacenewrequirementsonthemeshingprocessneededtosupportmultidimensionalreactorsimulation.Thisarticlediscussesthecurrentstateofmeshingtechnologyappliedtoreactorsimulationandexaminesasetofissuesthatareimportantinthegenerationofhigh-qualityreactormeshestodayandinthefuture.
