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复杂边界下大涡模拟的格子Boltzmann并行方法.docx

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复杂边界下大涡模拟的格子Boltzmann并行方法 Title:AGridBoltzmannParallelMethodforLargeEddySimulationinComplexBoundaries Abstract: Largeeddysimulation(LES)isawidelyusedcomputationalfluiddynamicstechniqueforsimulatingturbulentflows.Toaccuratelycapturecomplexflowphenomenainpracticalapplications,suchasflowsovercomplexboundaries,agridBoltzmannparallelmethodhasbeendeveloped.ThispaperpresentsadetailedanalysisofthegridBoltzmannparallelmethodforLESincomplexboundaries,discussingitsadvantages,challenges,andpotentialapplications. Introduction: Largeeddysimulation(LES)hasproventobeavaluabletoolforstudyingturbulentflowsinvariousengineeringandscientificfields.However,accuratelysimulatingcomplexboundaryconditionsremainsachallenge.ThegridBoltzmannparallelmethodoffersanovelapproachtoaddressthisissueandhasshownpromisingresultsincapturingcomplexflowphenomena. GridBoltzmannMethod: ThegridBoltzmannmethodisaparticle-basedcomputationalmethodwidelyusedforsimulatingturbulentflows.Inthismethod,thevelocitydistributionfunctionisdiscretizedonacomputationalgrid,andtheparticleinteractionsaresimulatedbasedontheBoltzmannequation.ThegridBoltzmannmethodhasadvantages,suchasitsabilitytohandlecomplexflowfeatures,suchasshearing,splitting,andmergingflows,whilemaintaininghighaccuracyandefficiency. ParallelComputing: ParallelcomputingplaysacrucialroleinthegridBoltzmannmethodforLESincomplexboundaries.Thelargecomputationaldomainandhigh-resolutionrequirementsnecessitateefficientutilizationofcomputationalresources.Thispaperexploresvariousparallelcomputingtechniques,suchasdomaindecomposition,loadbalancing,andcommunicationoptimization,toenhancethescalabilityandefficiencyofthemethod. TreatmentofComplexBoundaries: Modelingcomplexboundariesaccuratelyisacriticalchallengeinturbulentflowsimulations.ThepaperdiscussesthetreatmentofcomplexboundariesinthegridBoltzmannparallelmethod,includingimmersedboundarymethods,cut-cellmethods,andoversetmeshmethods.Thesetechniquesallowforbetterrepresentationofcomplexboundarygeometriesandfacilitatetheappli