7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

1/32

2011ANSYS,Inc. October24,20111

SystemCoupling

14.0

Two

wayFSIwithANSYSFLUENTandANSYSMechanical

Sreedevi Krishnan

ANSYSRegionalConference

Minneapolis

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

2/32

2011ANSYS,Inc. October24,20112

Fluidstructureinteractionproblemsencompassawiderangeof

applicationsinmanydifferentindustries.

Aerospace,

automotive,

power

generation,

biomedical,

etc.

FluidStructureInteractionApplications

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

3/32

2011ANSYS,Inc. October24,20113

Thesolutiontotwowayfluidstructureinteraction

requires

co

simulation

between

computational

fluid

dynamicsandstructuralmechanics.

Applicationssuchasairfoilflutter,flowinduced

vibrationfromwindloading,membranevalves,pumps,

elasticarterymodelingandfueltanksloshingrequirea

twoway

fluid

structure

interaction

solution

to

accuratelypredictthebehaviorofthedesign.

FluidStructureInteraction

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

4/32

2011ANSYS,Inc. October24,20114

Facilitatessimulationsthatrequiretightlyintegrated

couplings

of

analysis

systems

in

the

ANSYS

portfolio Extensiblearchitectureforrangeofcouplingscenarios

(one,two &nway,staticdata,cosimulation)

ANSYSWorkbenchuserenvironmentandworkflow

Standardexecutionmanagementanddatainterfaces

SystemCoupling14.0

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

5/32

2011ANSYS,Inc. October24,20115

Twowaysurfaceforce/displacementcouplingwith

ANSYS

Fluent

and

ANSYS

Mechanical Steady/staticandtransienttwowayFSI

Workbenchbasedsetupandexecution

WindowsandLinux

ExecutionfromcommandlineoutsideofWorkbenchincludingcrossplatformexecution

IntegratedpostprocessingwithANSYSCFDPost

ParallelprocessingforbothCFDandstructural

solutionswith

ANSYS

HPC

RSMcurrentlynotsupported

Restartsforfluidstructureinteraction

Parameterization,designexplorationandoptimization

SystemCoupling14.0 ABroadRangeof

Features

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

6/32

2011ANSYS,Inc. October24,20116

SystemCouplingSchematicSetup

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

7/32

2011ANSYS,Inc. October24,20117

SolutionupdatecanONLYbedoneviaSystemCoupling

SystemCouplingensuresthatthetimedurationandtimestepsettingsareconsistentacrossallparticipant

solvers

SystemCouplingControlstheParticipantSolvers

forTransient

and

Steady/Static

Solutions

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

8/32

2011ANSYS,Inc. October24,20118

SetupTransientStructuralModel

Setuptransient

structural

solution,structural

boundaryconditionsand

FluidSolidInterface

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

9/32

2011ANSYS,Inc. October24,20119

SetupFluidFlow(FLUENT)Model

Setuptransientfluidsolution,fluid

boundaryconditions

and

specify

SystemCouplingDynamicMesh

Zoneforfluidstructureinteraction

motion

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

10/32

2011ANSYS,Inc. October24,201110

SystemCouplingmotion

identifies

zones

that

may

participateinSystemCoupling

Allowsuserdefinedmotiontobe

combinedwithSystemCoupling

motion

Defaultstostationarymotiontypewhennotconnectedto

SystemCoupling

SystemCouplingMotionType

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

11/32

2011ANSYS,Inc. October24,201111

StateofSystemCouplingsetupcellwillbe

Upstream

data

is

now

available

for

SC

Setup

UpdateSetupCellsforTransientStructural

and

Fluid

Flow

(FLUENT)

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

12/32

2011ANSYS,Inc. October24,201112

SystemCouplingSetupGUI

SolutionInformation

TextMonitors

Chart

MonitorsOutline

Details

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

13/32

2011ANSYS,Inc. October24,201113

CouplingEndTime

CouplingStepSize MinimumNumberofIterations

perCouplingStep

MaximumNumberofIterations

per

Coupling

Step

SystemCouplingAnalysisSettings

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

14/32

2011ANSYS,Inc. October24,201114

Regionandvariableinformation

isgeneratedautomaticallyvia

UpdatewhenanalysissystemsarefirstconnectedtoSystem

Coupling

ForFLUENT,allregionsoftype

Wallare

shown

in

SC

Setup

ForMechanical,allregionsof

typeFluidSolidInterfaceare

showninSCSetup

SystemCouplingParticipantsareTransient

Structuraland

Fluid

Flow

(FLUENT)

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

15/32

2011ANSYS,Inc. October24,201115

UseCtrlkeytoselectaFLUENT

andMechanicalregionpairand

selectCreateDataTransferfromrightclickpopupmenu

Automaticallyfillsinthedetails

forthedatatransferregion

Datatransferscanbeoneway(i.e.onlytransferforceoronly

transferdisplacement)ortwo

way

RecommendedWaytoCreateDataTransfer

Regions

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

16/32

2011ANSYS,Inc. October24,201116

CreateDataTransfers

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

17/32

2011ANSYS,Inc. October24,201117

Participant

Region Variable

TransferAt

StartofIterationonly

UnderRelaxationFactor

ConvergenceTarget

DataTransferDefinestheDetailsforthe

Source,Target

and

Data

Transfer

Controls

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

18/32

2011ANSYS,Inc. October24,201118

CoSimulationSequence

TransientorStaticStructuralwillalwaysbefirstinthecosimulationsequence

DebugOutput

Differentlevelsofdebugoutputforanalysisanddatatransfers

IntermediateResultsFileOutput

Controlstheintervalsforwriting

restartfileinformation

ExecutionControl

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

19/32

2011ANSYS,Inc. October24,201119

ExecutingSystemCoupling

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

20/32

2011ANSYS,Inc. October24,201120

FromschematicselectUpdateusingrightclickmenu

onSystemCouplingsolutioncell

Solutionprogress(%complete)canbemonitoredusing

ViewProgressmenu

AlternativeMethodforExecutingSystem

Coupling

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

21/32

2011ANSYS,Inc. October24,201121

Buildinformation

Completesummaryofcoupling

serviceinput

file

Analysisdetails

Participantsummaries

Datatransferdetails

Mappingdiagnostics

Timestepanditerationsummary

Solverfieldequation

convergencesummary

Datatransferconvergence

summary

FLUENT/MAPDLsolveroutput

SolutionInformation

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

22/32

2011ANSYS,Inc. October24,201122

ChartMonitors

Defaultchart

monitors

showconvergence

historyforalldata

transfers.

Xaxiscanbe

couplingtime,

stepor

iteration.

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

23/32

2011ANSYS,Inc. October24,201123

AddchartsbyselectingCreateConvergenceChart

Variables

can

be

added

or

removed

from

charts Datatransfers,CFDandstructuralconvergence

norms

Chartpropertiesareeditableinsamemannerasother

chartswithinANSYSWorkbench

AddingChartsandVariables

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

24/32

2011ANSYS,Inc. October24,201124

TransientStructuralorFluidFlow(FLUENT)Resultscell

forsolverspecificpostprocessing

AddaResultsSystem(ANSYSCFDPost)forunified

postprocessingofstructuralandfluidresults

PostProcessingSystemCoupling

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

25/32

2011ANSYS,Inc. October24,201125

OscillatingPlateVerification

Excellent

correlation

between

SystemCoupling,published

dataandMFXsolver

PostProcessingSystemCoupling

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

26/32

2011ANSYS,Inc. October24,201126

SystemCoupling

Examples

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

27/32

2011ANSYS,Inc. October24,201127

FuelTankSloshing

Transientfree

surfaceflowin

afueltank

withinternal

baffles.

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

28/32

2011ANSYS,Inc. October24,201128

MitralValve

Transientblood

flowthrougha

threeleafmitral

valve,non

Newtonianfluid

andanisotropic

hyperelastic

tissue. Solution

includesremeshingofthe

fluiddomainand

nonlinear

contact.

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

29/32

2011ANSYS,Inc. October24,201129

ReedValve

Transient

responseof

reedvalve

openingand

closing.

Solution

includesre

meshingof

the

fluiddomain,

large

deformations

andnonlinear

contact.

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

30/32

2011ANSYS,Inc. October24,201130

VibratingRod

Transient

responseof

vibrating

rod

including

vortex

shedding.

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

31/32

2011ANSYS,Inc. October24,201131

DeformationofaLeakagePath

Steadystate

solutionfora

narrow

representativeleakagepathina

fuelinjector

assembly

clearancegap.

7/27/2019 Two Way Fluid-Mechanical System Interaction using ANSYS

32/32

2011ANSYS,Inc. October24,201132

Questionsand

Answers