starccm+与Abaqus 耦合分析.docx

starccm+与Abaqus 耦合分析.docx

《starccm+与Abaqus 耦合分析.docx》由会员分享，可在线阅读，更多相关《starccm+与Abaqus 耦合分析.docx（37页珍藏版）》请在冰豆网上搜索。

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