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1、43 WORKSHOP TheSTAR CCM workflow IntroducesthemainprocessesinSTAR CCM 44 Carinawindtunnel Objective FollowthroughallthestagesintheSTAR CCM workflow GainconfidenceinusingtheSTAR CCM interface Thisexerciseusesasimplegeometryofacarinawindtunnel Laterexerciseswillbuildonthebasicslearnthere 45 Workflowfo
2、rasimplecar Featurescovered Import x tgeometryofsurface Nosurfacerepairrequired Splitsurfacestodefinerequiredboundaries Definemeshsettings Specifythicknessofprismlayer Definephysicssettings Incompressible turbulent steady Checksolversettings Usedefaults Runsimulation Postprocessingiscoveredinnextexe
3、rcise 46 StartaSTAR CCM simulation LaunchSTAR CCM StartanewsimulationbygoingtoFile NewSimulation KeepthedefaultsettingsinthedialogueboxandclickonOK 47 Importgeometry File Import ImportSurfaceMeshandchoosethesurfacenamedWorkflow wind tunnel x t SelecttoCreateNewPart leaveremainingoptionsattheirdefaul
4、tvaluesandclickOKintheImportSurfaceOptionsdialog 48 ImportGeometry Theimportshowsonegeometrypart containingonesurface Inthescene plotpanelselectGeometryScene1 Displayers Geometry1 InthePropertiespanel turnontheMeshdisplayoption Geometryandscalardisplayersalsochangebyusingthescenetoolbar sactivatemes
5、hbutton Savethefileaswind tunnel sim 49 CheckSurface Checkthesurfaceforerrors Gotothesimulationtree Right clickonGeometry Parts wind tunnel RepairSurface ClickOKintheopeningwindow 50 CheckSurface IntheeditpanelclickonManageThresholds Inthenewpanelcheckthatallthresholdsareactive thenclickApplyandOK 5
6、1 CheckSurface Therearenograveerrorsinthegeometry closethepanelaftercheckingthem TheCloseProximityFacesareresolvedaftersplittingandinterfacecreation PoorQualityFacesaregoneafterremeshing 52 ScalingandSplitting Weneedtoscaletheimportbyafactorof10tochangethelengthtometers SelectGeometry Parts wind tun
7、nelnode RightclickandselectTransform Scalefromcontextmenu InthedialogboxenteraScaleFactorof10 ClickApplyandClose ClickontheResetViewicon Splittheimportedsurfacestoassigntoindividualboundaries SelecttheGeometry Parts wind tunnel Surfaces Facesnode RightclickandselectSplitbyPatch fromthecontextmenu 53
8、 Specifygeometrysetup SplitandrenamethePartSurfaces Clickthefrontfaceoftheairflowinthewindtunnel renameittoInletandclickCreate Dothesamefortheotherfaces ThesymmetryfaceSymmetryThesidefaceWallThebackfaceOutletThebottomfaceFloorThetopfaceTopClickClose 54 Specifygeometrysetup Splitthecarintoseparatesur
9、facestoo RightclickonFacesandselectSplitNon Contiguousfromcontextmenu Clickonthenamesofthethreenewlycreatedsurfacestohighlighttheirgeometryinthescene SelectthetwowheelsusingCTRL thenrightclickandselectCombinetogatherthemunderthesameboundary RenamethewheelsasWheelsandthecarasBody 55 Transferofgeometr
10、yelements STAR CCM separatesgeometrypartsfromsimulationrelevantregions Simulationrelevantpartsneedtobetransferredintotheregionsfolder Selectwind tunnel AssignPartstoRegions Modes Oneregionperpart Oneboundaryperpartsurface ClickCreateRegionsandClose 56 Defineboundaryconditions Theboundarytypeaffectst
11、hemeshing GotoRegions SelecteachboundaryandsetitsTypeinthePropertieswindowfollowingthetablebelow 57 Selectmeshmodels Selectthemeshingmodels STAR CCM loadsadditionalfunctionalityonlyifrequired GotoParts wind tunnel RightclickandselectCreateMeshOperation AutomatedMesh Checkthatwind tunnelisselectedfor
12、Partsandselectthemodels SurfaceRemesher TrimmedCellMesher PrismLayerMesher ClickOK AnewentryappearsunderOperations Theyellowexclamationmarkindicatesthatthisoperationhasnotbeenexecutedyet 58 Defaultmeshsettings Makethedefaultmeshsettings GotoOperations AutomatedMesh UnderDefaultControlsset BaseSize 0
13、 25m PrismLayerTotalThickness RelativeSize 10 59 Generatemesh Startthemeshingpipeline GotoOperations AutomatedMesh RightclickandselectExecute OrpresstheGenerateVolumeMeshbuttoninthetoolbar STAR CCM automaticallygeneratesasurfacemesh thenavolumemeshwithprismlayersonthewalls Theexclamationmarkdisappea
14、rsandanewnodeisaddedtoContinua PartsMeshes 60 Generatemesh Inanewscenethemeshisvisualized Createanewmeshscene RightclickontheScenes NewScene Mesh OrusetheCreate OpenScenesbuttoninthevistoolbar Makethescenetransparent 61 VisualizeMesh Changetheview PressTonyourkeyboard ThisisashortcutforTopviewinz di
15、rection Makeviewparallel Clickonthecameraicon SelectProjection Parallel Createasectionplanethroughthewheels Inthevistoolbarclickonthefxicon Drawalineinthesceneasshowninthepicture ChoosetoselectaNewGeometryDisplayer 62 VisualizeMesh Changethepositionofthesectionplaneifitdoesn tcutthroughthewheel Goto
16、DerivedParts planesection InthepropertieswindowofSinglesectionclickontheOffsetvalue Asliderappearsandallowstoadjustthepositioninteractively 63 VisualizeMesh HidedisplayerMesh1 Gotothescene plotpanel RightclickDisplayers Mesh1 ToggleVisibility MakemeshvisiblefordisplayerSectionGeometry1 ClickonDisplayers SectionGeometry1 InthepropertieswindowclickontheMeshcheckbox ExpandtheSectionGeometry1 Partsfolder Rightclickplanesection AlignViewtoPartNormal 64 Settingthephysics Choosethephysicsmodels Rightcl
