Spaceclaim-Ansys-SCDM-145-L11cfd-Extract-Flow-Volu

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©2012ANSYS,Inc.November13,2012114.5ReleaseLecture11:GeometryRepairsandVolumeExtractionIntroductiontoANSYSSpaceclaimDirectModeler(SCDM)©2012ANSYS,Inc.November13,20122Simplificationandrepairs•InthisclasswewillwalkthroughtherepairingandfillingtoolsusedtomodifymodelsinSpaceClaim.•Wewillfocuson:A.RepairB.VolumeExtractC.RemovingfilletsD.Update©2012ANSYS,Inc.November13,20123VolumeEnclosure•OpenTurbine_Blade.scdocfile.•Note:IfthePreviewpaneisselectedyoucanmanipulatethemodelinsidethewindowsexplorerwithoutopeningSpaceClaim.©2012ANSYS,Inc.November13,20124•Repair-Stitch–AfterloadingtheTurbineBlademodelyouwillnoticeintheStructureTreethatthispartconsistsofseveralsinglesurfaces.–GotoRepairtabandstitchthesurfacestogethertoone.Allgapsaredisplayedasrededges.Acceptthisselectionwiththegreentickmark.–Theresultinggeometryisonebigsurface,now.StitchSurfaces©2012ANSYS,Inc.November13,20125•Repair-Gaps–Afterstitchingthesurfaces,checkthemodelforGaps.Aninformationcallout,inthelowerrightcorner,showsthat4areaswerefound.–Allgapsaredisplayedasrededges.Acceptthisselectionwiththegreenticmark.–Aninformationcallout,inthelowerrightcorner,showsthat4areasarefixed.Gaps-Interference©2012ANSYS,Inc.November13,20126•Repair–MissingFaces–Afterfindingandfixinggapsinourmodel,wecheckonmissingfaces.Theinformationcallout,showsthat2areaswerefound.–Thistime,donotusethegreentickmark.Zoomintotheshownleakageandselecttheloopofrededges.Closethesecondmissingfacebyselectingtheredloop.Thiswilltakeabitlongertime,duetothefactthatasolidiscreatedafterclosingthelastleakage.MissingFaces-Interference©2012ANSYS,Inc.November13,20127•Repair–CheckGeometry–ItseemsthatwehavefoundallproblemsinourgeometryandobtainaproperSolid.Tobesure,wecanuseCheckGeometrytool.Youfindthisfunctionbyclickingtherightmousebuttonoverthedesiredsolid.–Theinformationcallout,inthelowerrightcorner,showsthatnogeometryproblemswerefound.–Note:Onalaterexamplewewilldemonstratehowtoidentifyandsolveproblemsfoundbythismethod.CheckGeometry©2012ANSYS,Inc.November13,20128•VolumeExtract–Forlateruse,itmakessensetochangethevisibilityofthissolidalwaystotransparentinsteadofopaque.YoufindthisfunctionbyclickingtherightmousebuttonoverthedesiredsolidVolumeExtract©2012ANSYS,Inc.November13,20129•VolumeExtract–Theturbinebladeistobecooledbyfluidflowinthechannelsinsidetheblade.ForaCFDCalculationweneedtomeshthisinternalvolume.–GotoPreparetabandselectVolumeExtractintheDefinegroupmenu.VolumeExtract©2012ANSYS,Inc.November13,201210•VolumeExtract–Inordertofilluptheinternalvolumewehavetoidentifytheopenings.Wehavetwochoicestodothis:selectthesurroundingedgesoftheopeningorthefaceenclosingtheopening.–Thenextstepsshowthesecondoption.–UseSelectFaces–Optionandclickonthetopfaceofthebladeasshown.VolumeExtract©2012ANSYS,Inc.November13,201211•VolumeExtract–SelectaSeedFacestartingfromthepriorselectedfacetodetermineinwhichdirectionthefillingstarts.VolumeExtract©2012ANSYS,Inc.November13,201212•VolumeExtract–UseSelectFaces–Optionforthesideface,toidentifythe2ndregionofopenings.–Note:Hereitisonlynecessarytoselectonefacetoidentifyalltheopeningsthatlieonthisface.WiththeSelectEdges–Option,wehavetoselect15edges.VolumeExtract©2012ANSYS,Inc.November13,201213•VolumeExtract–Youcanimaginethatwemaymissanopening.Thiswillresultinleakageandfailurewhenextractingthevolume.Let’sseehowwecanidentifytheopeningwheretheleakageoccurs.–OntheleftpanelyouwillnoticetheOptionmenuoftheVolumeExtractFunctionality.–TickmarkPreviewinsidefaces.Thecompletemodelwillbered.Thisisduetothefact,thatweforgetanopening.–Movetheslidertoleftside.Aftermovingtheslideragainabittotheright,youwillnoticewherethe“redflow”movedto.VolumeExtract©2012ANSYS,Inc.November13,201214•VolumeExtract–Thepicturesequenceshowswhere“redflow”goes.Thelastpictureshowsthatattheendofthecoolingchannelafacewasn`tselected.VolumeExtract©2012ANSYS,Inc.November13,201215•VolumeExtract(animated)–TheinnerVolumeofthebladehastobecooled.ForaCFDCalculationweneedtomeshtheinnervolume.Inordertofilluptheinnervolumewehaveidentifytheopenings.WehaveVolumeExtract©2012ANSYS,Inc.November13,201216•VolumeExtract–SwitchoffPreviewinsidefacesandselectthemissingface.–Switchonagaintosee……VolumeExtract©2012ANSYS,Inc.November13,201217•RemoveRounds–Ournextgoalistode-featuresomefilletsintheSOLID.Thedrillholesatthetrailingedgeandneartheopeningsattherootarenotnecessary.Laterweupdatethesechangestothefluidzone.–SelectonefiletasshownandnoticeattheleftsideinSelectiontabthechangedvalue.Clickonthevalue1,271mminthe…equalto..row.–Noticethatallroundswiththisvaluearenowhighlighted.–Hint:Selectagainwithleftintothewhitefieldtodeselectthevalue,butnotthefilletselection.–Inthenextstepwedeselectsomeunneededfillets.De-featureFillets©2012ANSYS,Inc.November13,201218•Prepare-RemoveRounds–DoubleClickonbothfilletsurfacesasshownattheright.Thisdeselectstheverylongfilletsouteredge.Selectionofdrillholesandinnerfilletsstillpersists.–Hint:MovetheMiddleMouseWheelbyholdingtheCtrl–Buttontoscrollthroughallunderlyingsurfaces.–Acceptthisselectionbyclickingonthegreentickmark.De-featureFillets©2012AN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