ansysworkbench流固耦合计算实例Word文档下载推荐.docx

ansysworkbench流固耦合计算实例Word文档下载推荐.docx

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Samplefilesrefereneedbythistutorialinclude:

*OscillatingPlate.pre

*OscillatingPlate.agdb

*OscillatingPlate.gtm

*OscillatingPlate.inp

1.Features

ThistutorialaddressesthefollowingfeaturesofANSYSCFX.

Component

Feature

Details

ANSYSCFX-Pre

UserMode

GeneralMode

SimulationType

Transient

ANSYSMulti-field

FluidType

GeneralFluid

DomainType

SingleDomain

TurbulenceModel

Laminar

HeatTransfer

None

OutputControl

MonitorPoints

TransientResultsFile

BoundaryDetails

Wall:

MeshMotion=ANSYSMultiField

NoSlip

Adiabatic

Timestep

ANSYSCFX-Post

Plots

Animation

Contour

Vector

Inthistutorialyouwilllearnabout:

*Movingmesh

*Fluid-solidinteraction（includingmodelingsoliddeformationusingANSYS）

*RunninganANSYSMulti-field（MFX）simulation

*Post-processingtworesultsfilessimultaneously.

2.OverviewoftheProblemtoSolve

Thistutorialusesasimpleoscillatingplateexampletodemonstratehowtosetupandrunasimulationinvolvingtwo-wayFluid-StructureInteraction,wherethefluidphysicsissolvedinANSYSCFXandthesolidphysicsissolvedintheFEApackageANSYS.Couplingbetweenthetwosolversisrequiredthroughoutthesolutiontomodeltheinteractionbetweenfluidandsolidastimeprogresses,andtheframeworkforthecouplingisprovidedbytheANSYSMulti-fieldsolver,usingtheMFXsetup.

Thegeometryconsistsofa2Dclosedcavity.Athinplateisanchoredtothebottomofthecavityasshownbelow:

Aninitialpressureof100Paisappliedtoonesideofthethinplatefor0.5secondsinordertodistortit.Oncethispressureisreleased,theplateoscillatesbackwardsandforwardsasitattemptstoregainitsequilibrium（vertical）position.Thesurroundingfluiddampstheoscillations,whichthereforehaveanamplitudethatdecreasesintime.TheCFXSolvercalculateshowthefluidrespondstothemotionoftheplate,andtheANSYSSolvercalculateshowtheplatedeformsasaresultofboththeinitialappliedpressureandthepressureresultingfromthepreseneeofthefluid.Couplingbetweenthetwosolversisrequiredsineethesoliddeformationaffectsthefluidsolution,andthefluidsolutionaffectsthesoliddeformation.

ThetutorialdescribesthesetupandexecutionofthecalculationincludingthesetupofthesolidphysicsinSimulation（withinANSYSWorkbench）andthesetupofthefluidphysicsand

ANSYSMulti-fieldsettingsinANSYSCFX-Pre.IfyoudonothaveANSYSWorkbench,thenyoucanusetheprovidedANSYSinputfiletoavoidtheneedforSimulation.

3.SettinguptheSolidPhysicsinSimulation（ANSYSWorkbench）

Thissectiondescribesthestep-by-stepdefinitionofthesolidphysicsinSimulationwithinANSYSWorkbenchthatwillresultinthecreationofanANSYSinputfileOscillatingPlate.inp.Ifyouprefer,youcaninsteadusetheprovidedOscillatingPlate.inpfileandcontinuefromSettinguptheFluidPhysicsandANSYSMulti-fieldSettingsinANSYSCFX-Pre.

CreatingaNewSimulation

1.Ifrequired,launchANSYSWorkbench.

2.ClickEmptyProject.TheProjectpageappearsdisplayinganunsavedproject.

3.SelectFile>

SaveorclickSavebutton.

4.Ifrequired,setthepathlocationtoadifferentfolder.Thedefaultlocationisyourworkingdirectory.However,ifyouhaveaspecificfolderthatyouwanttousetostorefilescreatedduringthistutorial,changethepath.

5.UnderFilename,typeOscillatingPlate.

6.ClickSave.

7.UnderLinktoGeometryFileonthelefthandtaskbarclickBrowse.SelecttheprovidedfileOscillatingPlate.agdbandclickOpen.

8.MakesurethatOscillatingPlate.agdbishighlightedandclickNewsimulationfromtheleft-handtaskbar.

CreatingtheSolidMaterial

1.WhenSimulationopens,expandGeometryintheprojecttreeatthelefthandsideoftheSimulationwindow.

2.SelectSolid,andintheDetailsviewbelow,selectMaterial.

3.UsethearrowthatappearsnexttothematerialnameStructuralSteeltoselectNew

Material.

4.WhentheEngineeringDatawindowopens,right-clickNewMaterialfromthetreeview

andrenameittoPlate.

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5.Enter2.5e06forYoung'

sModulus,0.35forPoisson'

sRatioand2550forDensity.

Notethattheotherpropertiesarenotusedforthissimulation,andthattheunitsforthesevaluesareimpliedbytheglobalunitsinSimulation.

6.ClicktheSimulationtabnearthetopoftheWorkbenchwindowtoreturntothesimulation.

BasicAnalysisSettings

TheANSYSMulti-fieldsimulationisatransientmechanicalanalysis,withatimestepof0.1sandatimedurationof5s.

1.SelectNewAnalysis>

FlexibleDynamicfromthetoolbar.

2.SelectAnalysisSettingsfromthetreeviewandintheDetailsviewbelow,setAutoTimeSteppingtoOff.

3.SetTimeStepto0.1.

4.UnderTabularDataatthebottomrightofthewindow,setEndTimeto5.0fortheSteps=1setting.

InsertingLoads

LoadsareappliedtoanFEAanalysisastheequivalentofboundaryconditionsinANSYSCFX.Inthissection,youwillsetafixedsupport,afluid-solidinterface,andapressureload.

FixedSupport

Thefixedsupportisrequiredtoholdthebottomofthethinplateinplace.

1.Right-clickFlexibleDynamicinthetreeandselectInsert>

FixedSupportfromtheshortcutmenu.

2.RotatethegeometryusingtheRotatebuttonsothatthebottom（low-y）faceofthe

solidisvisible,thenselectFace囲andclickthelow-yface.

Thatfaceshouldbehighlightedtoindicateselection.

3.EnsureFixedSupportisselectedintheOutlineview,then,intheDetailsview,selectGeometryandclick1FacetomaketheApplybuttonappear（ifnecessary）.ClickApplytosetthefixedsupport.

Fluid-SolidInterface

ItisnecessarytodefinetheregioninthesolidthatdefinestheinterfacebetweenthefluidinCFXandthesolidinANSYS.Dataisexchangedacrossthisinterfaceduringtheexecutionofthesimulation.

FluidSolidInterfacefrom

theshortcutmenu.

2.Usingthesameface-selectionproceduredescribedearlier,selectthethreefacesofthegeometrythatformtheinterfacebetweenthesolidandthefluid（low-x,high-yandhigh-xfaces）byholdingdown<

Ctrl>

toselectmultiplefaces.Notethatthisloadisautomaticallygivenaninterfacenumberof1.

PressureLoad

Thepressureloadprovidestheinitialadditionalpressureof100[Pa]forthefirst0.5secondsofthesimulation.Itisdefinedusingastepfunction.

1.Right-clickFlexibleDynamicinthetreeandselectInsert>

Pressurefromtheshortcutmenu.

2.Selectthelow-xfaceforGeometry.

3.IntheDetailsview,selectMagnitude,andusingthearrowthatappears,selectTabular（Time）.

4.UnderTabularData,setapressureof100inthetablerowcorrespondingtoatimeof0.

Note:

Theunitsfortimeandpressureinthistablearetheglobalunitsof[s]and[Pa],respectively.

5.Younowneedtoaddtwonewrowstothetable.Thiscanbedonebytypingthenewtime

andpressuredataintotheemptyrowatthebottomofthetable,andSimulationwillautomaticallyre-orderthetableinorderoftimevalue.Enterapressureof100foratimevalueof0.499,andapressureof0foratimevalueof0.5.

iTabularData

Steps

Time

阳"

Free：

jijre|

1

100J

2

0499

100

3

0.5

0.

4

5

Thisgivesastepfunctionforpressurethatcanbeseeninthecharttotheleftofthetable.

WritingtheANSYSInputFile

TheSimulationsettingsarenowcomplete.AnANSYSMulti-fieldruncannotbelaunchedfromwithinSimulation,sotheSolvebuttonscannotbeusedtoobtainasolution.

1.Instead,highlightSolutioninthetree,selectTools>

WriteANSYSInputFileandchoosetowritethesolutionsetuptothefileOscillatingPlate.inp.

2.Themeshisautomaticallygeneratedaspartofthisprocess.Ifyouwanttoexamineit,selectMeshfromthetree.

3.SavetheSimulationdatabase,usethetabnearthetopoftheWorkbenchwindowtoreturntotheOscillatingPlate[Project]tab,andsavetheprojectitself.

4.SettinguptheFluidPhysicsandANSYSMulti-fieldSettingsinANSYSCFX-Pre

Thissectiondescribesthestep-by-stepdefinitionoftheflowphysicsandANSYSMulti-fieldsettingsinANSYSCFX-Pre.

PlayingaSessionFile

IfyouwanttoskippasttheseinstructionsandtohaveANSYSCFX-Presetupthesimulationautomatically,youcanselectSession>

PlayTutorialfromthemenuinANSYSCFX-P