Pointwise-网格划分教程CaseStudies

PointwiseApplicationCaseStudiesShanghaiFeiyiSoftwareTechnologySeminars,May2016Dr.RickMatusPointwise,[e-mail]•InternationalMeshingRoundtable-Electricpoweredaircraft-LondonTowerBridge•DrivAer•PropulsionAerodynamicsWorkshop•SonicBoomWorkshop1InternationalMeshingRoundtable•FoundedbySandiaLabs-Startedin1992-Shareinformationrelatedtomeshgenerationandpreprocessing-Bringstogetherresearchersanddevelopers•MeshingContest-GeometryprovidedbyIMR-Maximum20millioncells-Judgingcriteria-Noveltyofapproach-Complexityofdiscretization-Qualityofmesh-Usabilityofproposedsolution•22ndRoundtable,2013-7organizationscompeted-Pointwisewoncompetition-13millioncellT-Rexmesh21.GeometryCleanup2.SurfaceMeshing3.VolumeMeshingInternationalMeshingRoundtable,201415TowerBridgeSurfaceMesh16TowerBridgeVolumeMesh1718MeshingConsiderationsforAutomotiveShapeDesignOptimization,TravisCarrigan,ClaudioPita,Pointwise,Inc.MarkLandon,OptimalSolutions,SAEPaper2016-01-1389:4-8hoursCellCount:7millionBafflesforRefinementDrivAerMeshStatistics26PotsdamPropellerTestCase2015•HostedbySVAPotsdam(PotsdamModelTestBasin)-VP1304variablepitchpropeller-Comparisonsoftorque,thrust,cavitation,andpressurepulses27•T-RexMeshwithtriangularsurfacemesh-3blocks-Propeller-Wake-Outer-38,392,628tetrahedralcells•Afterprismcombination-21,848,622cells-13,529,288tetrahedra-94,662pyramids-8,224,672prisms28SurfaceMesh29HubleadingedgeTiptrailingedgeT-RexPrismLayersandPyramids30ConvertTrianglestoQuadsinT-Rex31•Prism-tet-Hex-prism-tet•35%reductionincellcount-8,942,671tetrahedra-823,554pyramids-913,282prisms-3,542,636hexahedra-14,222,143totalcellsAIAAPropulsionAerodynamicsWorkshop•AtAIAAPower&EnergyConf-23-24July2016-SaltLakeCity,Utah,USA•CFD–WindTunnelComparison•Threetestcases-DiffusingS-Duct-DualSeparateFlowNozzle-DualMixedFlowNozzle•(VGs)AIPRakeS-DuctStructured,NoVGs,NoAIPRake3536X=0X=5X=10X=15S-DuctUnstructure,NoVGs,NoAIPRake38X=0X=5X=10X=15S-DuctUnstructuredwithVGs40S-DuctUnstructuredwithAIPRake42AIAASonicBoomPredictionWorkshop44LockheedMartinLM-102145•PointwiseisinthebusinessofCAEmeshing•Emphasisonhigh-qualitygridswithautomation•PointwiseV18increasescelltypeflexibilityfor-Higher-qualitycells-Reducedcellcount-BetterCFDsolverconvergence-BetterCFDsolveraccuracy48