starccm+与Abaqus 耦合分析.docx
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starccm+与Abaqus 耦合分析.docx
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starccm+与Abaqus耦合分析
Co-SimulationbetweenStar-ccmand Abaqus
Theco-simulationtechniquecanbeusedtosolvecomplexfluid-structureinteraction(FSI)problemsbycoupling Abaqus and STAR-CCM+.
Abaqus solvesthestructuraldomainand STAR-CCM+ solvesthefluiddomain.ThetwodomainsareinterconnectedusingtheSIMULIACo-SimulationEngine(CSE).Thischapterdescribeshowtousetheco-simulationtechniquewithSTAR-CCM+ and Abaqus tosolveFSIproblems.Forgeneralinformationonusing Abaqus,refertothe Abaqus AnalysisUser’sGuide,andformoreinformationonco-simulationin Abaqus,see“Co-simulation”,Section26oftheAbaqus AnalysisUser’sGuide.
TargetApplications
The STAR-CCM+ and Abaqus Co-Simulationcapabilitytargetssimulationsinvolvingcompliantstructuralresponsetofluidflowandtheircomplexinterrelationship.Mechanicaland/orthermalpropertiescanbeexchangedacrossthefluid-structureinterface.
Mostofthefeaturesin STAR-CCM+ canbeusedinaco-simulation,includingcompressibleandincompressibleflow,laminarandturbulentflow,heattransfer,arichsetofmaterialoptions,andfree-surface,multi-species,andmultiphasedrivenflows.Theimplicitunsteadysolverisenabledforusewith Abaqus co-simulation.Formechanicalmovingboundaryproblems,theco-simulationtechniqueworkswiththemorphermotionmodeltosolvethetransportequations.Forfurtherdetails,refertothe ModelingPhysics sectionoftheUserGuide.
Mostofthefeaturesin Abaqus arealsoavailableforuseinaco-simulation,includingnonlinearmaterials,nonlineargeometriceffects,andcontact.Thefollowing Abaqus proceduressupportco-simulation:
staticstress/displacement,dynamic(implicitandexplicit),heattransfer(steady-stateandtransient),coupledtemperature-displacement,coupledthermal-electrical,andpiezoelectricanalysis.Theinterfacedomaincanbemodeledwithmostcontinuum,shell,andmembraneelements.
Co-simulationwith Abaqus supportswallboundaries,baffleboundaries,andporousbaffleboundariesascoupledboundaries.Inmostcases,youcanusewallboundaries.
Theuseofbaffleboundariesorporousbaffleboundariesisrecommendedformodelingthethermalresistanceorporosityofathinstructure.Inbothcases,thermalresistanceandporosityaremodeledwithinSTAR-CCM+,whereasAbaqus modelsthestructuremechanicalresponsetothepressurefieldsentby STAR-CCM+.
ApplicationsthatthisFSIcapabilitydoesnottargetinclude:
•FrequencydomainFSIproblems,includingvibro-acousticandaero-acoustic.
Suchproblemsaretreatedmoreeffectivelyusingfrequencydomainmethodsandarenotsuitedforthepartitionedsolutionapproach.The Abaqus acousticcapabilityisapplicableforsuchproblems(see"Acoustic,shock,andcoupledacoustic-structuralanalysis"Section6.10.1ofthe Abaqus AnalysisUser’sGuide,formoreinformation).TheHarmonicBalancemethod(afrequencydomainanalysis)in STAR-CCM+ isnotsupportedwithco-simulation.
•Structuresthataremodeledwithtruss,beam,andanyspecial-purposeelementsthatarewettedbythefluid.
Suchdiscretizationhasaninconsistentgeometricidealizationwiththefluiddomain.Ifsuchstructuralelementsexistinthemodel,theymustbelinkedtootherstructuralelementsthatunambiguouslydefinetheactualwettedsurface.Importedandexporteddataisthenmappedto/fromthiswettedsurfacetothecorrespondingsurfacein STAR-CCM+.
•Problemsinvolvinginjectionmolding,casting,materialsolidification,andsuperplasticforming.
Ifthefluid-structureinterfacechangesduringthesimulation,theseapplicationsarenotsuitedfortheFSIapproach.The Abaqus InterfaceforMoldflowcanbeapplicable(seethe Abaqus InterfaceforMoldflowUser’sGuide,formoreinformation).
•Problemsinvolvingrupture,penetration,andfragmentation.
Intheseapplications,thestructuraldeformationcancauseasinglefluiddomaintoseparateintomultipledomains.
•Problemsinvolvingflowinporousmediawheretheintentionistoaccountforcoupledeffectsonthefine-scaleinternalstructureofthemedia(specifically,whereboththefluidandsoliddomainoverlap).
Thereisnoprohibitionontheuseofthelumpedparameterporousresistancemodelavailableforregionsin STAR-CCM+,butthismodelonlyhasanimpactonthefluiddomainthat STAR-CCM+ computes.Similarly,youcanusethecoupledporefluiddiffusion/stressprocedurein Abaqus/Standardtomodeltheporousmediaforthesoliddomain.
CouplingOptions
Co-Simulationwith Abaqus allowsforthermalandmechanicalcouplingatthefluid-structureinterface.Inthermalco-simulationanalyses, STAR-CCM+ exportsboundaryheatfluxto Abaqus andimportstemperaturedata.Inmechanicalco-simulationanalyses, STAR-CCM+ exportstractiondata(pressureandwallshearstress)to Abaqus andimportsnodaldisplacements.
Fluid-StructureInterfaceTopology
Inaco-simulationwith Abaqus,youcanexchangedatabetween STAR-CCM+ boundariesand Abaqus surfaces(surface-to-surfacecoupling),orbetween STAR-CCM+ boundariesand Abaqus nodes(surface-to-pointcoupling).
Insurface-to-pointcoupling, STAR-CCM+ mapsboundaryloadsontothecoupled Abaqus node.Thisfeatureisintendedforcoupling STAR-CCM+ witharigidbodyin Abaqus.Inmechanicalco-simulationanalyses,thedisplacementofthe Abaqus nodeinresponsetotheappliedloadscompletelydefinesthedisplacementoftherigidbody Abaqus model.Forthermalco-simulationanalyses,thecoupled Abaqus nodemusthavetemperaturespecifications.Forexample,anisothermalrigidbodyin Abaqus isspecifiedas *RIGIDBODY,ISOTHERMAL=yes.
Surface-to-pointcouplingisonlyavailablewhenyouselect STAR-CCM+ asthemappercode.Formoreinformation,see MapperSettingsProperties.
ExchangedFields
Thetablesbelowidentifythefieldsthatcanbeexchangedbetween Abaqus and STAR-CCM+ duringaco-simulation.Thefirsttabledefinesthecorrespondencebetweenthe Abaqus fieldsandthe STAR-CCM+ fieldfunctionsaswellasthedimensionalityofthefields.
Abaqus
STAR-CCM+
FieldName
AbaqusFieldID
Dimensionality
FieldFunctionNames
Dimensionality
Displacement,Rotation
U,UR
L
NodalDisplacement
L
Velocity,RotationalVelocity
V,VR
LT-1,T-1
Velocity
LT-1
TractionVector,TotalMoment
CF,CM
F,FL
WallShearStress,StaticPressure,orAbsolutePressure
FL-2
Temperature
NT
θ
Temperature
θ
HeatFlux
CFL
JT-1
BoundaryHeatFlux
JT-1L-2
FilmProperties
(heattransfercoefficient,ambienttemperature)
CFILM
JT-1L-2θ-1
θ
BoundaryHeatFlux,
LocalHeatTransferReferenceTemperatureorSpecifiedY+HeatTransferReferenceTemperature
JT-1L-2
θ
Thefollowingtableliststhefieldswhichareimported(incoming)orexported(outgoing)by Abaqus foreachavailable Abaqus analysisproceduretype.
AbaqusProcedure
IncomingFields
OutgoingFields
CF, CM
CFL
CFILM
U, UR
V, VR
NT
Static
-
-
-
-
Dynamic(Implicit)
-
-
-
Dynamic(Explicit)
-
-
-
HeatTransfer
-
-
-
CoupledTemperature-Displacement
-
SystemRequirements
Thissectiondescribesthesystemrequirementsforrunningaco-simulationwith Abaqus.
Beforeyoustart,ensurethatthefollowingversionsof Abaqus and STAR-CCM+ havebeeninstalled:
•STAR-CCM+ v10.04
•Abaqus 6.14
Itisimportantthatyouverifythateachproductisproperlyinstalledbeforecontinuing.ConsulttherespectiveproductInstallationGuidesforinstallationinstructionsandproductverification.
Licensing
STAR-CCM+ and Abaqus areseparatelylicensedproducts,andlicensesarerequiredfrombothSIMULIAandCD-adapco.Inaddition,aseparatelicenseisrequiredfortheSIMULIACo-SimulationEngine.Informationoninstallingandmanaging Abaqus licensescanbefoundunderLicensingontheSupportpageat Informationoninstallingandmanaging STAR-CCM+ licensescanbefoundintheSettingUpLicensingsectionoftheSTAR-CCM+ InstallationGuide.ContactyourlocalSIMULIAorCD-adapcosupportofficeforassistanceindetermininglicensingrequirements.
SIMULIACo-SimulationEngine
TheSIMULIACo-SimulationEngineisasoftwarecomponentresponsibleforcommunicationbetween Abaqus and STAR-CCM+.ItisdistributedandinstalledwiththeAbaqussoftwareasdynamiclinklibraries.
For STAR-CCM+ tocommunicatewith Abaqus duringtheco-simulation,itmusthaveaccesstothesedynamiclinklibraries.Tofindthelibraries, STAR-CCM+ worksthroughthefollowingthreemethods,inorder,untilithasfoundthem:
1.STAR-CCM+ usesthepaththatthe SIMULIA_CSE_LIBPATH environmentvariablesets.Ifthisenvironmentvariableexists,andcontainsavalidpathtodynamiclinklibraries, STAR-CCM+ usestheselibraries.Setthispathwhenworkingwithlibrariesthathavebeendownloadedseparatelytothemain Abaqus installer.
2.STAR-CCM+ locatesthelibrariesrelativetotheexecutablepathorlaunchcommandthatisgivenfor Abaqus.TheExecutableNamepropertyofthe Co-Simulations > [AbaqusCo-Simulation1] > Values > AbaqusExecution nodetakeseitheran Abaqus commandorfullpathtothe Abaqus executable. STAR-CCM+ canusethissettingtolocatethelibraries.Thissettingissufficientwhenthedefaultdynamiclinklibrariescontainedwithinthe Abaqus installationareused.
3.STAR-CCM+ searchesthepathsthataresetinthe LD_LIBRARY_PATH environmentvariableonLinux,orthe PATH environmentvariableonWindows.Includinganypathsaddedtotheprogramenvironmentusingthe -ldlibpathoptiononthe starccm+ command.
Onrareoccasions,itisnecessarytoobtainupdatedversionsofthedynamiclinklibrariesfromtheSIMULIAdownloadarea.Instructionsondownloadinglibrariesseparatelycanbefoundinthedocument,“SIMULIACo-Simulation
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