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/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2015-2016 OpenFOAM Foundation
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\\/ M anipulation |
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
OpenFOAM is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
\*---------------------------------------------------------------------------*/
#include "alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField.H"
#include "fvPatchFieldMapper.H"
#include "addToRunTimeSelectionTable.H"
#include "twoPhaseSystem.H"
#include "ThermalPhaseChangePhaseSystem.H"
#include "MomentumTransferPhaseSystem.H"
#include "compressibleTurbulenceModel.H"
#include "ThermalDiffusivity.H"
#include "PhaseCompressibleTurbulenceModel.H"
#include "wallFvPatch.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
namespace compressible
{
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
scalar alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::maxExp_
= 50.0;
scalar alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::tolerance_
= 0.01;
label alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::maxIters_
= 10;
// * * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * //
void alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::checkType()
{
if (!isA<wallFvPatch>(patch()))
{
FatalErrorInFunction
<< "Patch type for patch " << patch().name() << " must be wall\n"
<< "Current patch type is " << patch().type() << nl
<< exit(FatalError);
}
}
tmp<scalarField>
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::Psmooth
(
const scalarField& Prat
) const
{
return 9.24*(pow(Prat, 0.75) - 1.0)*(1.0 + 0.28*exp(-0.007*Prat));
}
tmp<scalarField>
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::yPlusTherm
(
const scalarField& P,
const scalarField& Prat
) const
{
tmp<scalarField> typsf(new scalarField(this->size()));
scalarField& ypsf = typsf.ref();
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{
scalar ypt = 11.0;
for (int i=0; i<maxIters_; i++)
{
scalar f = ypt - (log(E_*ypt)/kappa_ + P[facei])/Prat[facei];
scalar df = 1 - 1.0/(ypt*kappa_*Prat[facei]);
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scalar yptNew = ypt - f/df;
if (yptNew < VSMALL)
{
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}
else if (mag(yptNew - ypt) < tolerance_)
{
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}
else
{
ypt = yptNew;
}
}
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}
return typsf;
}
tmp<scalarField>
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::calcAlphat
(
const scalarField& prevAlphat
) const
{
// Lookup the fluid model
const ThermalPhaseChangePhaseSystem
<
MomentumTransferPhaseSystem<twoPhaseSystem>
>& fluid =
refCast
<
const ThermalPhaseChangePhaseSystem
<
MomentumTransferPhaseSystem<twoPhaseSystem>
>
>
(
db().lookupObject<phaseSystem>("phaseProperties")
);
const phaseModel& liquid
(
fluid.phase1().name() == internalField().group()
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? fluid.phase1()
: fluid.phase2()
);
const label patchi = patch().index();
// Retrieve turbulence properties from model
const phaseCompressibleTurbulenceModel& turbModel = liquid.turbulence();
const scalar Cmu25 = pow025(Cmu_);
const scalarField& y = turbModel.y()[patchi];
const tmp<scalarField> tmuw = turbModel.mu(patchi);
const scalarField& muw = tmuw();
const tmp<scalarField> talphaw = liquid.thermo().alpha(patchi);
const scalarField& alphaw = talphaw();
const tmp<volScalarField> tk = turbModel.k();
const volScalarField& k = tk();
const fvPatchScalarField& kw = k.boundaryField()[patchi];
const fvPatchVectorField& Uw = turbModel.U().boundaryField()[patchi];
const scalarField magUp(mag(Uw.patchInternalField() - Uw));
const scalarField magGradUw(mag(Uw.snGrad()));
const fvPatchScalarField& rhow = turbModel.rho().boundaryField()[patchi];
const fvPatchScalarField& hew =
liquid.thermo().he().boundaryField()[patchi];
const fvPatchScalarField& Tw =
liquid.thermo().T().boundaryField()[patchi];
scalarField Tp(Tw.patchInternalField());
// Heat flux [W/m2] - lagging alphatw
const scalarField qDot
(
(prevAlphat + alphaw)*hew.snGrad()
);
scalarField uTau(Cmu25*sqrt(kw));
scalarField yPlus(uTau*y/(muw/rhow));
scalarField Pr(muw/alphaw);
// Molecular-to-turbulent Prandtl number ratio
scalarField Prat(Pr/Prt_);
// Thermal sublayer thickness
scalarField P(this->Psmooth(Prat));
scalarField yPlusTherm(this->yPlusTherm(P, Prat));
tmp<scalarField> talphatConv(new scalarField(this->size()));
scalarField& alphatConv = talphatConv.ref();
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// Populate boundary values
forAll(alphatConv, facei)
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{
// Evaluate new effective thermal diffusivity
scalar alphaEff = 0.0;
if (yPlus[facei] < yPlusTherm[facei])
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{
scalar A = qDot[facei]*rhow[facei]*uTau[facei]*y[facei];
scalar B = qDot[facei]*Pr[facei]*yPlus[facei];
scalar C = Pr[facei]*0.5*rhow[facei]*uTau[facei]*sqr(magUp[facei]);
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alphaEff = A/(B + C + VSMALL);
}
else
{
scalar A = qDot[facei]*rhow[facei]*uTau[facei]*y[facei];
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scalar B =
qDot[facei]*Prt_*(1.0/kappa_*log(E_*yPlus[facei]) + P[facei]);
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scalar magUc =
uTau[facei]/kappa_*log(E_*yPlusTherm[facei]) - mag(Uw[facei]);
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scalar C =
0.5*rhow[facei]*uTau[facei]
*(Prt_*sqr(magUp[facei]) + (Pr[facei] - Prt_)*sqr(magUc));
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alphaEff = A/(B + C + VSMALL);
}
// Update convective heat transfer turbulent thermal diffusivity
alphatConv[facei] = max(0.0, alphaEff - alphaw[facei]);
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}
return talphatConv;
}
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField
(
const fvPatch& p,
const DimensionedField<scalar, volMesh>& iF
)
:
alphatPhaseChangeWallFunctionFvPatchScalarField(p, iF),
Prt_(0.85),
Cmu_(0.09),
kappa_(0.41),
E_(9.8)
{
checkType();
}
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField
(
const fvPatch& p,
const DimensionedField<scalar, volMesh>& iF,
const dictionary& dict
)
:
alphatPhaseChangeWallFunctionFvPatchScalarField(p, iF, dict),
Prt_(dict.lookupOrDefault<scalar>("Prt", 0.85)),
Cmu_(dict.lookupOrDefault<scalar>("Cmu", 0.09)),
kappa_(dict.lookupOrDefault<scalar>("kappa", 0.41)),
E_(dict.lookupOrDefault<scalar>("E", 9.8))
{}
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField
(
const alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField& ptf,
const fvPatch& p,
const DimensionedField<scalar, volMesh>& iF,
const fvPatchFieldMapper& mapper
)
:
alphatPhaseChangeWallFunctionFvPatchScalarField(ptf, p, iF, mapper),
Prt_(ptf.Prt_),
Cmu_(ptf.Cmu_),
kappa_(ptf.kappa_),
E_(ptf.E_)
{}
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField
(
const alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField& awfpsf
)
:
alphatPhaseChangeWallFunctionFvPatchScalarField(awfpsf),
Prt_(awfpsf.Prt_),
Cmu_(awfpsf.Cmu_),
kappa_(awfpsf.kappa_),
E_(awfpsf.E_)
{}
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField
(
const alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField& awfpsf,
const DimensionedField<scalar, volMesh>& iF
)
:
alphatPhaseChangeWallFunctionFvPatchScalarField(awfpsf, iF),
Prt_(awfpsf.Prt_),
Cmu_(awfpsf.Cmu_),
kappa_(awfpsf.kappa_),
E_(awfpsf.E_)
{}
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
void alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::updateCoeffs()
{
if (updated())
{
return;
}
operator==(calcAlphat(*this));
fixedValueFvPatchScalarField::updateCoeffs();
}
void alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField::write
(
Ostream& os
) const
{
fvPatchField<scalar>::write(os);
os.writeEntry("Prt", Prt_);
os.writeEntry("Cmu", Cmu_);
os.writeEntry("kappa", kappa_);
os.writeEntry("E", E_);
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dmdt_.writeEntry("dmdt", os);
writeEntry("value", os);
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
makePatchTypeField
(
fvPatchScalarField,
alphatPhaseChangeJayatillekeWallFunctionFvPatchScalarField
);
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace compressible
} // End namespace Foam
// ************************************************************************* //