ANSYS原版流固耦合计算实例

OscillatingPlatewithTwo-WayFluid-StructureInteractionANSYS-ChinaIntroductionThistutorialincludes:FeaturesOverviewoftheProblemtoSolveSettinguptheSolidPhysicsinSimulation(ANSYSWorkbench)SettinguptheFluidPhysicsandANSYSMulti-fieldSettingsinANSYSCFX-PreObtainingaSolutionusingANSYSCFX-SolverManagerViewingResultsinANSYSCFX-PostIfthisisthefirsttutorialyouareworkingwith,itisimportanttoreviewthefollowingtopicsbeforebeginning:SettingtheWorkingDirectoryChangingtheDisplayColorsUnlessyouplanonrunningasessionfile,youshouldcopythesamplefilesusedinthistutorialfromtheinstallationfolderforyoursoftware(CFXROOT/examples/)toyourworkingdirectory.Thispreventsyoufromoverwritingsourcefilesprovidedwithyourinstallation.Ifyouplantouseasessionfile,pleaserefertoPlayingaSessionFile.Samplefilesreferencedbythistutorialinclude:OscillatingPlate.preOscillatingPlate.agdbOscillatingPlate.gtmOscillatingPlate.inp1.FeaturesThistutorialaddressesthefollowingfeaturesofANSYSCFX.ComponentFeatureDetailsANSYSCFX-PreUserModeGeneralModeSimulationTypeTransientANSYSMulti-fieldComponentFeatureDetailsFluidTypeGeneralFluidDomainTypeSingleDomainTurbulenceModelLaminarHeatTransferNoneOutputControlMonitorPointsTransientResultsFileBoundaryDetailsWall:MeshMotion=ANSYSMultiFieldWall:NoSlipWall:AdiabaticTimestepTransientANSYSCFX-PostPlotsAnimationContourVectorInthistutorialyouwilllearnabout:MovingmeshFluid-solidinteraction(includingmodelingsoliddeformationusingANSYS)RunninganANSYSMulti-field(MFX)simulationPost-processingtworesultsfilessimultaneously.2.OverviewoftheProblemtoSolveThistutorialusesasimpleoscillatingplateexampletodemonstratehowtosetupandrunasimulationinvolvingtwo-wayFluid-StructureInteraction,wherethefluidphysicsissolvedinANSYSCFXandthesolidphysicsissolvedintheFEApackageANSYS.Couplingbetweenthetwosolversisrequiredthroughoutthesolutiontomodeltheinteractionbetweenfluidandsolidastimeprogresses,andtheframeworkforthecouplingisprovidedbytheANSYSMulti-fieldsolver,usingtheMFXsetup.Thegeometryconsistsofa2Dclosedcavity.Athinplateisanchoredtothebottomofthecavityasshownbelow:Aninitialpressureof100Paisappliedtoonesideofthethinplatefor0.5secondsinordertodistortit.Oncethispressureisreleased,theplateoscillatesbackwardsandforwardsasitattemptstoregainitsequilibrium(vertical)position.Thesurroundingfluiddampstheoscillations,whichthereforehaveanamplitudethatdecreasesintime.TheCFXSolvercalculateshowthefluidrespondstothemotionoftheplate,andtheANSYSSolvercalculateshowtheplatedeformsasaresultofboththeinitialappliedpressureandthepressureresultingfromthepresenceofthefluid.Couplingbetweenthetwosolversisrequiredsincethesoliddeformationaffectsthefluidsolution,andthefluidsolutionaffectsthesoliddeformation.ThetutorialdescribesthesetupandexecutionofthecalculationincludingthesetupofthesolidphysicsinSimulation(withinANSYSWorkbench)andthesetupofthefluidphysicsandANSYSMulti-fieldsettingsinANSYSCFX-Pre.IfyoudonothaveANSYSWorkbench,thenyoucanusetheprovidedANSYSinputfiletoavoidtheneedforSimulation.3.SettinguptheSolidPhysicsinSimulation(ANSYSWorkbench)Thissectiondescribesthestep-by-stepdefinitionofthesolidphysicsinSimulationwithinANSYSWorkbenchthatwillresultinthecreationofanANSYSinputfileOscillatingPlate.inp.Ifyouprefer,youcaninsteadusetheprovidedOscillatingPlate.inpfileandcontinuefromSettinguptheFluidPhysicsandANSYSMulti-fieldSettingsinANSYSCFX-Pre.CreatingaNewSimulation1.Ifrequired,launchANSYSWorkbench.2.ClickEmptyProject.TheProjectpageappearsdisplayinganunsavedproject.3.SelectFileSaveorclickSavebutton.4.Ifrequired,setthepathlocationtoadifferentfolder.Thedefaultlocationisyourworkingdirectory.However,ifyouhaveaspecificfolderthatyouwanttousetostorefilescreatedduringthistutorial,changethepath.5.UnderFilename,typeOscillatingPlate.6.ClickSave.7.UnderLinktoGeometryFileonthelefthandtaskbarclickBrowse.SelecttheprovidedfileOscillatingPlate.agdbandclickOpen.8.MakesurethatOscillatingPlate.agdbishighlightedandclickNewsimulationfromtheleft-handtaskbar.CreatingtheSolidMaterial1.WhenSimulationopens,expandGeometryintheprojecttreeatthelefthandsideoftheSimulationwindow.2.SelectSolid,andintheDetailsviewbelow,selectMaterial.3.UsethearrowthatappearsnexttothematerialnameStructuralSteeltoselectNewMaterial.4.WhentheEngineeringDatawindowopens,right-clickNewMaterialfromthetreeviewandrenameittoPlate.5.Enter2.5e06forYoung'sModulus,0.35forPoisson'sRatioand2550forDensity.Notethattheotherpropertiesarenotusedforthissimulation,andthattheunitsforthesevaluesareimpliedbytheglobalunitsinSimulation.6.ClicktheSimulationtabnearthetopoftheWorkbenchwindowtoreturntothesimulation.BasicAnalysisSettingsTheANSYSMulti-fieldsimulationisatransientmechanicalanalysis,withatimestepof0.1sandatimedurationof5s.1.SelectNewAnalysisFlexibleDynamicfromthetoolbar.2.SelectAnalysisSettingsfromthetreeviewandintheDetailsviewbelow,setAutoTimeSteppingtoOff.3.SetTimeStepto0.1.4.UnderTabularDataatthebottomrightofthewindow,setEndTimeto5.0fortheSteps=1setting.InsertingLoadsLoadsareappliedtoanFEAanalysisastheequivalentofboundaryconditionsinANSYSC