advectiveFvPatchField.C

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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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     \\/     M anipulation  |
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License
    This file is part of OpenFOAM.
 
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    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.
 
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    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
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#include "advectiveFvPatchField.H"
#include "addToRunTimeSelectionTable.H"
#include "fvPatchFieldMapper.H"
#include "volFields.H"
#include "EulerDdtScheme.H"
#include "CrankNicolsonDdtScheme.H"
#include "backwardDdtScheme.H"
#include "localEulerDdtScheme.H"
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class Type>
Foam::advectiveFvPatchField<Type>::advectiveFvPatchField
(
    const fvPatch& p,
    const DimensionedField<Type, volMesh>& iF
)
:
    mixedFvPatchField<Type>(p, iF),
    phiName_("phi"),
    rhoName_("rho"),
    fieldInf_(pTraits<Type>::zero),
    lInf_(-GREAT)
{
    this->refValue() = pTraits<Type>::zero;
    this->refGrad() = pTraits<Type>::zero;
    this->valueFraction() = 0.0;
}
 
 
template<class Type>
Foam::advectiveFvPatchField<Type>::advectiveFvPatchField
(
    const advectiveFvPatchField& ptf,
    const fvPatch& p,
    const DimensionedField<Type, volMesh>& iF,
    const fvPatchFieldMapper& mapper
)
:
    mixedFvPatchField<Type>(ptf, p, iF, mapper),
    phiName_(ptf.phiName_),
    rhoName_(ptf.rhoName_),
    fieldInf_(ptf.fieldInf_),
    lInf_(ptf.lInf_)
{}
 
 
template<class Type>
Foam::advectiveFvPatchField<Type>::advectiveFvPatchField
(
    const fvPatch& p,
    const DimensionedField<Type, volMesh>& iF,
    const dictionary& dict
)
:
    mixedFvPatchField<Type>(p, iF),
    phiName_(dict.lookupOrDefault<word>("phi", "phi")),
    rhoName_(dict.lookupOrDefault<word>("rho", "rho")),
    fieldInf_(pTraits<Type>::zero),
    lInf_(-GREAT)
{
    if (dict.found("value"))
    {
        fvPatchField<Type>::operator=
        (
            Field<Type>("value", dict, p.size())
        );
    }
    else
    {
        fvPatchField<Type>::operator=(this->patchInternalField());
    }
 
    this->refValue() = *this;
    this->refGrad() = pTraits<Type>::zero;
    this->valueFraction() = 0.0;
 
    if (dict.readIfPresent("lInf", lInf_))
    {
        dict.lookup("fieldInf") >> fieldInf_;
 
        if (lInf_ < 0.0)
        {
            FatalIOErrorInFunction
            (
                dict
            )   << "unphysical lInf specified (lInf < 0)" << nl
                << "    on patch " << this->patch().name()
                << " of field " << this->dimensionedInternalField().name()
                << " in file " << this->dimensionedInternalField().objectPath()
                << exit(FatalIOError);
        }
    }
}
 
 
template<class Type>
Foam::advectiveFvPatchField<Type>::advectiveFvPatchField
(
    const advectiveFvPatchField& ptpsf
)
:
    mixedFvPatchField<Type>(ptpsf),
    phiName_(ptpsf.phiName_),
    rhoName_(ptpsf.rhoName_),
    fieldInf_(ptpsf.fieldInf_),
    lInf_(ptpsf.lInf_)
{}
 
 
template<class Type>
Foam::advectiveFvPatchField<Type>::advectiveFvPatchField
(
    const advectiveFvPatchField& ptpsf,
    const DimensionedField<Type, volMesh>& iF
)
:
    mixedFvPatchField<Type>(ptpsf, iF),
    phiName_(ptpsf.phiName_),
    rhoName_(ptpsf.rhoName_),
    fieldInf_(ptpsf.fieldInf_),
    lInf_(ptpsf.lInf_)
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class Type>
Foam::tmp<Foam::scalarField>
Foam::advectiveFvPatchField<Type>::advectionSpeed() const
{
    const surfaceScalarField& phi =
        this->db().objectRegistry::template lookupObject<surfaceScalarField>
        (phiName_);
 
    fvsPatchField<scalar> phip =
        this->patch().template lookupPatchField<surfaceScalarField, scalar>
        (
            phiName_
        );
 
    if (phi.dimensions() == dimDensity*dimVelocity*dimArea)
    {
        const fvPatchScalarField& rhop =
            this->patch().template lookupPatchField<volScalarField, scalar>
            (
                rhoName_
            );
 
        return phip/(rhop*this->patch().magSf());
    }
    else
    {
        return phip/this->patch().magSf();
    }
}
 
 
template<class Type>
void Foam::advectiveFvPatchField<Type>::updateCoeffs()
{
    if (this->updated())
    {
        return;
    }
 
    const fvMesh& mesh = this->dimensionedInternalField().mesh();
 
    word ddtScheme
    (
        mesh.ddtScheme(this->dimensionedInternalField().name())
    );
    scalar deltaT = this->db().time().deltaTValue();
 
    const GeometricField<Type, fvPatchField, volMesh>& field =
        this->db().objectRegistry::template
        lookupObject<GeometricField<Type, fvPatchField, volMesh> >
        (
            this->dimensionedInternalField().name()
        );
 
    // Calculate the advection speed of the field wave
    // If the wave is incoming set the speed to 0.
    const scalarField w(Foam::max(advectionSpeed(), scalar(0)));
 
    // Calculate the field wave coefficient alpha (See notes)
    const scalarField alpha(w*deltaT*this->patch().deltaCoeffs());
 
    label patchi = this->patch().index();
 
    // Non-reflecting outflow boundary
    // If lInf_ defined setup relaxation to the value fieldInf_.
    if (lInf_ > 0)
    {
        // Calculate the field relaxation coefficient k (See notes)
        const scalarField k(w*deltaT/lInf_);
 
        if
        (
            ddtScheme == fv::EulerDdtScheme<scalar>::typeName
         || ddtScheme == fv::CrankNicolsonDdtScheme<scalar>::typeName
        )
        {
            this->refValue() =
            (
                field.oldTime().boundaryField()[patchi] + k*fieldInf_
            )/(1.0 + k);
 
            this->valueFraction() = (1.0 + k)/(1.0 + alpha + k);
        }
        else if (ddtScheme == fv::backwardDdtScheme<scalar>::typeName)
        {
            this->refValue() =
            (
                2.0*field.oldTime().boundaryField()[patchi]
              - 0.5*field.oldTime().oldTime().boundaryField()[patchi]
              + k*fieldInf_
            )/(1.5 + k);
 
            this->valueFraction() = (1.5 + k)/(1.5 + alpha + k);
        }
        else if
        (
            ddtScheme == fv::localEulerDdtScheme<scalar>::typeName
        )
        {
            const volScalarField& rDeltaT =
                fv::localEulerDdt::localRDeltaT(mesh);
 
            // Calculate the field wave coefficient alpha (See notes)
            const scalarField alpha
            (
                w*this->patch().deltaCoeffs()/rDeltaT.boundaryField()[patchi]
            );
 
            // Calculate the field relaxation coefficient k (See notes)
            const scalarField k(w/(rDeltaT.boundaryField()[patchi]*lInf_));
 
            this->refValue() =
            (
                field.oldTime().boundaryField()[patchi] + k*fieldInf_
            )/(1.0 + k);
 
            this->valueFraction() = (1.0 + k)/(1.0 + alpha + k);
        }
        else
        {
            FatalErrorInFunction
                << ddtScheme << nl
                << "    on patch " << this->patch().name()
                << " of field " << this->dimensionedInternalField().name()
                << " in file " << this->dimensionedInternalField().objectPath()
                << exit(FatalError);
        }
    }
    else
    {
        if
        (
            ddtScheme == fv::EulerDdtScheme<scalar>::typeName
         || ddtScheme == fv::CrankNicolsonDdtScheme<scalar>::typeName
        )
        {
            this->refValue() = field.oldTime().boundaryField()[patchi];
 
            this->valueFraction() = 1.0/(1.0 + alpha);
        }
        else if (ddtScheme == fv::backwardDdtScheme<scalar>::typeName)
        {
            this->refValue() =
            (
                2.0*field.oldTime().boundaryField()[patchi]
              - 0.5*field.oldTime().oldTime().boundaryField()[patchi]
            )/1.5;
 
            this->valueFraction() = 1.5/(1.5 + alpha);
        }
        else if
        (
            ddtScheme == fv::localEulerDdtScheme<scalar>::typeName
        )
        {
            const volScalarField& rDeltaT =
                fv::localEulerDdt::localRDeltaT(mesh);
 
            // Calculate the field wave coefficient alpha (See notes)
            const scalarField alpha
            (
                w*this->patch().deltaCoeffs()/rDeltaT.boundaryField()[patchi]
            );
 
            this->refValue() = field.oldTime().boundaryField()[patchi];
 
            this->valueFraction() = 1.0/(1.0 + alpha);
        }
        else
        {
            FatalErrorInFunction
                << ddtScheme
                << "\n    on patch " << this->patch().name()
                << " of field " << this->dimensionedInternalField().name()
                << " in file " << this->dimensionedInternalField().objectPath()
                << exit(FatalError);
        }
    }
 
    mixedFvPatchField<Type>::updateCoeffs();
}
 
 
template<class Type>
void Foam::advectiveFvPatchField<Type>::write(Ostream& os) const
{
    fvPatchField<Type>::write(os);
 
    this->template writeEntryIfDifferent<word>(os, "phi", "phi", phiName_);
    this->template writeEntryIfDifferent<word>(os, "rho", "rho", rhoName_);
 
    if (lInf_ > 0)
    {
        os.writeKeyword("fieldInf") << fieldInf_ << token::END_STATEMENT << nl;
        os.writeKeyword("lInf") << lInf_ << token::END_STATEMENT << nl;
    }
 
    this->writeEntry("value", os);
}
 
 
// ************************************************************************* //