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2 OpenFOAM for beginner

OpenFOAM

[email protected]

/ ( )(H17/9 )

ADVENTURECluster http://www.alde.co.jp


LES ( H17/3)3D (in-house)

CFDOpenFOAM/FrontFlow/UPACS/SPHYSICS/FreeCFD

CFD(intel Core i7 920 , 12GB, geforce GTS250)(intel Core i7 920 , 12GB, geforce GTS250)

(H22/2)( )

OpenFOAM( )


( )1.1 reactingFoam1.2 dieselFoam1.3 XiFoam

example

OpenFOAM extension or development versionOpenFOAM extension or development version

OpenFOAM

※ OpenFOAM tutorial


/①XiFoam(H.Weller b-Ξ )②engineFoam( XiFoam)②engineFoam( XiFoam)

③reactingFoam(Golovitchev@chalmers PaSR )④rhoReacingFoam(reactingFoam density based solver version)

dieselFoam( PaSR )dieselEngineFoam( )fireFoam( )

coalChemistryFoam( )coalChemistryFoam( )porousExplicitSourceReactingParcelFoam( )

EBU/EDM SimpleFoam ?Ref : AALBORG C. Andersen , N. E. L. Nielsen

Numerical investigation of a BFR using OpenFOAM


1.1 reactingFoamchalmers Golovitchev PaSRchalmers Golovitchev PaSR

→eddy disspation / eddy break up

0

U

constant system

CH4( )

U

T

p

Ydefault

k( )

polyMesh

thermophysicalProperties

turbulentProperties(RAS/LES)

chemistryproperties

reactions

thermo.compressibleGas

controlDictpolyMeshpolyMesh

fvSolution

fvSchemes


1.1 reactingFoam/ constant/ constant

①thermophysicalPropertiesFoamFile{}// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //thermoType hsPsiMixtureThermo<reactingMixture<gasThermoPhysics>>;

inertSpecie N2;inertSpecie N2;

chemistryReader foamChemistryReader;

foamChemistryFile "$FOAM_CASE/constant/reactions";

foamChemistryThermoFile "$FOAM_CASE/constant/thermo.compressibleGas";


1.1 reactingFoam/ constant

★reactingFoam thermoType

thermoType hsPsiMixtureThermo<reactingMixture<gasThermoPhysics>>;or

thermoType hsPsiMixtureThermo<multiComponentMixture<gasThermoPhysics>>;

★ → N2InertSpecie N2 ;

★ / → Of or chemkinchemistryReader foamChemistryReader ; // OF

orchemistryReader chemkinReader ; // chemkin



★ /foamChemistryFile "$FOAM_CASE/constant/reactions";

orCHEMKINFile "$FOAM_CASE/constant/chem.inp";

ELEMENTSH O C NENDSPECIE C7H16 O2 N2 CO2 H2O

species(

O2H2OCH4CO2N2 C7H16 O2 N2 CO2 H2O

ENDREACTIONSC7H16 + 11O2 => 7CO2 + 8H2O 5.00E+8 0.0 15780.0! 1

FORD / C7H16 0.25 /FORD / O2 1.5 /

END

N2);reactions(

irreversibleArrheniusReactionCH4 + 2O2 = CO2 + 2H2O(5.2e16 0 14906)

);



★ foamChemistryThermo "thermo.compressibleGas";or

CHEMKINThermoFile "therm.dat";(O2 O2 1 31.9988

200 5000 10003.69758 0.00061352 -1.25884e-07 1.77528e-11 -1.13644e-15 -1233.93 3.189173.21294 0.00112749 -5.75615e-07 1.31388e-09 -8.76855e-13 -1005.25 6.034741.67212e-06 170.672

H2O H2O 1 18.0153cp = R((((a4T + a3)T + a2)T + a1)T + a0R

≒1000Kjanaf a0 a4 a5 a6janaf a0 a4 a5 a6

) H = RT(((((a4/5T + a3/4)T + a2/3)T + a1/2)T+a0)+a5R

S = R((((a4/4T + a3/3)T + a2/2)T + a1)T + a0RlnT+a6R



②chemistryPropertiespsiChemistryModel ODEChemistryModel<gasThermoPhysics>;

chemistry on;

chemistrySolver ode;

initialChemicalTimeStep 1e-07;initialChemicalTimeStep 1e-07;

turbulentReaction on;

Cmix Cmix [ 0 0 0 0 0 0 0 ] 0.1;



★ reactingFoam 2psiChemistryModel ODEChemistryModel<gasThermoPhysics>;

orpsiChemistryModel ODEChemistryModel<icoPoly8ThermoPhysics>;

★chemistry on;chemistry on;

turbulentReaction on;

Cmix Cmix [ 0 0 0 0 0 0 0 ] 0.1;



★initialChemicalTimeStep 1e-07;

★Cmix Cmix [ 0 0 0 0 0 0 0 ] 0.1;

※PaSRtk = Cmix*sqrt(turbulence->muEff()/rho/turbulence->epsilon());tk = Cmix*sqrt(turbulence->muEff()/rho/turbulence->epsilon());

Turbulentreaction onkappa = (runTime.deltaT() + tc)/(runTime.deltaT() + tc + tk);Turbulentreaction offkappa = 1.0;

chemistrySh = kappa*chemistry.Sh()(); →



★Sequential or EulerImplicit or ode

chemistrySolver ode;

sequentialCoeffs{

cTauChem 0.001;

EulerImplicitCoeffs{

cTauChem 0.05;equilibriumRateLimiter off;

}

tc

cTauChem 0.001;}

odeCoeffs{

ODESolver SIBS;eps 0.05;scale 1;

}

}

-SIBS : Semi-Implicit Bulirsh-Stoer

KRR4 : Kaps-Rentrop

RK : Runge-Kutta


1.2 dieselFoamreactingFoam ( )reactingFoam ( )

(ref M06005 )

0

U

T

constantsystem

controlDictthermophysicalProperties

CH4( )

T

p

Ydefault

k( )

polyMesh

combustionProperties


chemistryproperties

sprayProperties

injectorProperties

polyMesh fvSolution

fvSchemesft / fu

chemkin

chem.inp

therm.dat

chemkin


1.2 dieselFoam/ constant

①thermophysicalProperties

thermoType hsPsiMixtureThermo<reactingMixture<gasThermoPhysics>>;

CHEMKINFile "$FOAM_CASE/chemkin/chem.inp";

CHEMKINThermoFile "~OpenFOAM/thermoData/therm.dat";

reactingFoam

inertSpecie N2;

liquidComponents ( C7H16 ); ←liquidProperties{

C7H16 C7H16 defaultCoeffs; ← ( )}



①thermophysicalProperties

★ ( CHEMKIN File )

LiquidComponents(C7H16C6H14C6H14);

liquidProperties{

C7H16 C7H16 defaultCoeffs;C6H14 C6H14 defaultCoeffs;

}


1.2 dieselFoam/ constant/ constant

②combustionProperties

Cmix Cmix [ 0 0 0 0 0 0 0 ] 1; ← PaSR ( )

ignitionProperties1{

ignite off; ← on/off

ignitionPoint ignitionPoint [ 0 1 0 0 0 0 0 ] ( 0.2 0 0.02 ); ←

timing timing [ 0 0 1 0 0 0 0 ] 0; ←

duration duration [ 0 0 1 0 0 0 0 ] 1; ←}


1.2 dieselFoam/ constant/ constant

③injectorProperties

({

injectorType unitInjector; ←

unitInjectorProps{

commonRailInjectormultiHoleInjectorswirlInjector

{Position (0 0.0995 0); ← injector ( 0.5mm)Direction (0 -1 0); ← (-y )Diameter 0.00019; ← nozzleCd 0.9; ← mass 6e-06; ← NParcels 5000; ←



③injectorProperties 2X(

1.0 ← ( 1.0));massFlowRateProfile ← mass flow(

(0 0.1272)

liquidProperties

(0 0.1272)(4.16667e-05 6.1634)

temperatureProfile ←(

(0.0 320.0)(0.00125 320.0)

);



④sprayProperties 1

InterpolationSchemes {

U cellPointFace;rho cell;p cell;T cell;

}}

subCycles 2; ← minimum number of Lagrangian sub cycles

atomizationModel off; ← How atomization is treated( LISA/blobsSheetAtomization)

includeOscillation yes; ← droplet deformation; will effect droplet drag coef




breakupModel ReitzKHRT; ← If secondary break up is used( reitzDiwakar/ETAB/TAB/SHF/noBreakup)

injectorModel hollowConeInjector; ← Which injector model to use( blobsSwirl/Chomiak/pressureSwirl/constant)

collisionModel off; ← particle – particle interactioncollisionModel off; ← particle – particle interaction( ORourke/trajectoryModel)

evaporationModel standardEvaporationModel; ← which evaporation model to use ( RutlandFlashBoil/saturateEvaporationModel)




heatTransferModel RanzMarshall; ← Particle heat transfer model(or no heat transfer model)

dispersionModel off; ← If turbulent dispersion is used or not

dragModel standardDragModel; ← Particle drag modeldragModel standardDragModel; ← Particle drag model(or no drag model)

wallModel reflect; ← What happens to particles hitting the walls(or remove )


1.3 XiFoamImperialCollege Gosman H.Weller( OpenCFD)

Ref 24th Symposium (international) on Combution 1998/pp899-907Ref 24th Symposium (international) on Combution 1998/pp899-907

flame surface density model

→

0

U

constant system

muSgs / k ( )

U

T / Tu

p

b / Xi

Su

polyMesh

thermophysicalProperties


combustionProperties

controlDictpolyMeshpolyMesh

fvSolution

fvSchemes


1.3 XiFoam/ constant

①thermophysicalProperties ThermoType (1)< (2) < (3) < (4) < (5) < (6) > > > > >

hhuMixtureThermo<homogeneousMixture<sutherlandTransport<specieThermo<janafThermo<perfectGas>>>>>;

( )hhuMixtureThermo<inhomogeneousMixture<sutherlandTransport<specieThermo<janafThermo<perfectGas>>>>>;anafThermo<perfectGas>>>>>;

hhuMixtureThermo<veryInhomogeneousMixture<sutherlandTransport<specieThermo<janafThermo<perfectGas>>>>>;

hhuMixtureThermo<egrMixture<sutherlandTransport<specieThermo<janafThermo<perfectGas>>>>>;

janaf +


1.3 XiFoam/ constant/ constant

①thermophysicalProperties 2ThermoType (1)< (2) < (3) < (4) < (5) < (6) > > > > >

( )hhuMixtureThermo<inhomogeneousMixture<constTransport<specieThermo<hConstThermo<perfectGas>>>>>;

hhuMixtureThermo<veryInhomogeneousMixture<constTransport<specieThermo<hhhuMixtureThermo<veryInhomogeneousMixture<constTransport<specieThermo<hConstThermo<perfectGas>>>>>;

hhuMixtureThermo<egrMixture<constTransport<specieThermo<hConstThermo<perfectGas>>>>>;

+



②combustionProperties 1

laminarFlameSpeedCorrelation constant; ← Gulders

fuel Propane; ←

Su Su [0 1 -1 0 0 0 0] 0.135; ←Su Su [0 1 -1 0 0 0 0] 0.135; ←

SuModel transport; ← (algebraic or fixed )

equivalenceRatio equivalenceRatio [0 0 0 0 0 0 0] 0.6;

sigmaExt sigmaExt [0 0 -1 0 0 0 0] 338;




XiModel transport; ← Xi algebraic or fixed

XiCoef XiCoef [0 0 0 0 0 0 0] 0.62;

XiShapeCoef XiShapeCoef [0 0 0 0 0 0 0] 1;XiModel

uPrimeCoef uPrimeCoef [0 0 0 0 0 0 0] 1;


1.3 XiFoam/ constant


GuldersCoeffs ← Guilders{

3

Methane

{W 0.422;

Propane

{W 0.446;

IsoOctane

{W 0.4658;W 0.422;

eta 0.15;xi 5.18;alpha 2;beta -0.5;f 2.3;}

W 0.446;eta 0.12;xi 4.95;alpha 1.77;beta -0.2;f 2.3;}

W 0.4658;eta -0.326;xi 4.48;alpha 1.56;beta -0.22;f 2.3;}

Gulder.O.L 23th Symp(int) on Combust ,pp743-




ignite yes; ← on/off

IgnitionSites ←(

{location (0.005 -0.02 0); ←location (0.005 -0.02 0); ←Diameter 0.003; ←start 0; ←duration 0.05; ←strength 20; ← ( )

});




ignitionSphereFraction 0; ← ( ) 3D

ignitionThickness ignitionThickness [0 1 0 0 0 0 0] 0.001; ←

ignitionCircleFraction 1; ← ( ) 2D

ignitionKernelArea ignitionKernelArea [0 2 0 0 0 0 0] 0; ←


example

/ XiFoamLES(Weller pitzDaily 2D RANS or 3D LES )RAS(moriyoshiHomogeneous→RAS(moriyoshiHomogeneous→

reactingFoam2D RANS(k-e model) 1

dieselFoam3D aachenBomb RANS

chemkin 35 115 3954 290

engineFoam(LANL Kiva ?)fireFoam(poolFire Fire Dynamics Simulator ?)


OpenFOAM extension or development version

rostock LTTExtensionsubversion 1.6.x

http://janus.fms.uni-rostock.de/viewvc/repository/OpenFOAM/branches/

CERFACS (colin,Poinsot et al)thickenedFlame model XiFoam

PDF (ILDM, S.Pope)

freiberg OF+Cantera(alternate(steady)ReactingFoam)OpenFoamWiki 1.5.xOpenFoamWiki 1.5.x

http://openfoamwiki.net/index.php/Contrib_alternateReactingFoam

Cantera interface

reactingFoam (ex GRI-3.0)


OpenFOAM extension or development version

Sweden chalmersOpenFOAM ph.D

http://www.tfd.chalmers.se/~hani/kurser/OS_CFD_2009/

(Håkan Nilsson )

reactingFoam dieselFoamph.D

5th openFoam Workshop

IHIShape optimization of valve channel with incompressible to

compressible simulation for pressure Loss calculation


OpenFOAM

★ 7/30 CAE

OpenFOAMOpenFOAM

OpenFOAM

(LES Flamelet DT )

. B 75(759), 2299-2307, 2009-11-25. B 75(759), 2299-2307, 2009-11-25

→OpenFOAM( )

※ 1 FrontFlow/red

FFR ( )

OpenFoam


OpenFOAM

ex) reactingFoam +

5th OpenFOAM workshopdev extension


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OpenFOAM | !Þ! í o Â0 Ò b S u b ö&O ¦8o«...>/>,OpenFOAM _ /æ I Z 8 !Þ! í o Â0 Ò Ô ª ×...

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