mappedPatchFieldBase.C

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/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2013-2015 OpenFOAM Foundation
     \\/     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 "mappedPatchFieldBase.H"
#include "mappedPatchBase.H"
#include "interpolationCell.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
template<class Type>
mappedPatchFieldBase<Type>::mappedPatchFieldBase
(
    const mappedPatchBase& mapper,
    const fvPatchField<Type>& patchField,
    const word& fieldName,
    const bool setAverage,
    const Type average,
    const word& interpolationScheme
)
:
    mapper_(mapper),
    patchField_(patchField),
    fieldName_(fieldName),
    setAverage_(setAverage),
    average_(average),
    interpolationScheme_(interpolationScheme)
{}
 
 
template<class Type>
mappedPatchFieldBase<Type>::mappedPatchFieldBase
(
    const mappedPatchBase& mapper,
    const fvPatchField<Type>& patchField,
    const dictionary& dict
)
:
    mapper_(mapper),
    patchField_(patchField),
    fieldName_
    (
        dict.template lookupOrDefault<word>
        (
            "fieldName",
            patchField_.dimensionedInternalField().name()
        )
    ),
    setAverage_(readBool(dict.lookup("setAverage"))),
    average_(pTraits<Type>(dict.lookup("average"))),
    interpolationScheme_(interpolationCell<Type>::typeName)
{
    if (mapper_.mode() == mappedPatchBase::NEARESTCELL)
    {
        dict.lookup("interpolationScheme") >> interpolationScheme_;
    }
}
 
 
template<class Type>
mappedPatchFieldBase<Type>::mappedPatchFieldBase
(
    const mappedPatchBase& mapper,
    const fvPatchField<Type>& patchField
)
:
    mapper_(mapper),
    patchField_(patchField),
    fieldName_(patchField_.dimensionedInternalField().name()),
    setAverage_(false),
    average_(pTraits<Type>::zero),
    interpolationScheme_(interpolationCell<Type>::typeName)
{}
 
 
template<class Type>
mappedPatchFieldBase<Type>::mappedPatchFieldBase
(
    const mappedPatchFieldBase<Type>& mapper
)
:
    mapper_(mapper.mapper_),
    patchField_(mapper.patchField_),
    fieldName_(mapper.fieldName_),
    setAverage_(mapper.setAverage_),
    average_(mapper.average_),
    interpolationScheme_(mapper.interpolationScheme_)
{}
 
 
template<class Type>
mappedPatchFieldBase<Type>::mappedPatchFieldBase
(
    const mappedPatchBase& mapper,
    const fvPatchField<Type>& patchField,
    const mappedPatchFieldBase<Type>& base
)
:
    mapper_(mapper),
    patchField_(patchField),
    fieldName_(base.fieldName_),
    setAverage_(base.setAverage_),
    average_(base.average_),
    interpolationScheme_(base.interpolationScheme_)
{}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
template<class Type>
const GeometricField<Type, fvPatchField, volMesh>&
mappedPatchFieldBase<Type>::sampleField() const
{
    typedef GeometricField<Type, fvPatchField, volMesh> fieldType;
 
    const fvMesh& nbrMesh = refCast<const fvMesh>(mapper_.sampleMesh());
 
    if (mapper_.sameRegion())
    {
        if (fieldName_ == patchField_.dimensionedInternalField().name())
        {
            // Optimisation: bypass field lookup
            return
                dynamic_cast<const fieldType&>
                (
                    patchField_.dimensionedInternalField()
                );
        }
        else
        {
            const fvMesh& thisMesh = patchField_.patch().boundaryMesh().mesh();
            return thisMesh.template lookupObject<fieldType>(fieldName_);
        }
    }
    else
    {
        return nbrMesh.template lookupObject<fieldType>(fieldName_);
    }
}
 
 
template<class Type>
tmp<Field<Type> > mappedPatchFieldBase<Type>::mappedField() const
{
    typedef GeometricField<Type, fvPatchField, volMesh> fieldType;
 
    // Since we're inside initEvaluate/evaluate there might be processor
    // comms underway. Change the tag we use.
    int oldTag = UPstream::msgType();
    UPstream::msgType() = oldTag + 1;
 
    const fvMesh& thisMesh = patchField_.patch().boundaryMesh().mesh();
    const fvMesh& nbrMesh = refCast<const fvMesh>(mapper_.sampleMesh());
 
    // Result of obtaining remote values
    tmp<Field<Type> > tnewValues(new Field<Type>(0));
    Field<Type>& newValues = tnewValues();
 
    switch (mapper_.mode())
    {
        case mappedPatchBase::NEARESTCELL:
        {
            const mapDistribute& distMap = mapper_.map();
 
            if (interpolationScheme_ != interpolationCell<Type>::typeName)
            {
                // Send back sample points to the processor that holds the cell
                vectorField samples(mapper_.samplePoints());
                distMap.reverseDistribute
                (
                    (
                        mapper_.sameRegion()
                      ? thisMesh.nCells()
                      : nbrMesh.nCells()
                    ),
                    point::max,
                    samples
                );
 
                autoPtr<interpolation<Type> > interpolator
                (
                    interpolation<Type>::New
                    (
                        interpolationScheme_,
                        sampleField()
                    )
                );
                const interpolation<Type>& interp = interpolator();
 
                newValues.setSize(samples.size(), pTraits<Type>::max);
                forAll(samples, cellI)
                {
                    if (samples[cellI] != point::max)
                    {
                        newValues[cellI] = interp.interpolate
                        (
                            samples[cellI],
                            cellI
                        );
                    }
                }
            }
            else
            {
                newValues = sampleField();
            }
 
            distMap.distribute(newValues);
 
            break;
        }
        case mappedPatchBase::NEARESTPATCHFACE:
        case mappedPatchBase::NEARESTPATCHFACEAMI:
        {
            const label nbrPatchID =
                nbrMesh.boundaryMesh().findPatchID(mapper_.samplePatch());
 
            if (nbrPatchID < 0)
            {
                FatalErrorInFunction
                 << "Unable to find sample patch " << mapper_.samplePatch()
                 << " in region " << mapper_.sampleRegion()
                 << " for patch " << patchField_.patch().name() << nl
                 << abort(FatalError);
            }
 
            const fieldType& nbrField = sampleField();
 
            newValues = nbrField.boundaryField()[nbrPatchID];
            mapper_.distribute(newValues);
 
            break;
        }
        case mappedPatchBase::NEARESTFACE:
        {
            Field<Type> allValues(nbrMesh.nFaces(), pTraits<Type>::zero);
 
            const fieldType& nbrField = sampleField();
 
            forAll(nbrField.boundaryField(), patchI)
            {
                const fvPatchField<Type>& pf =
                    nbrField.boundaryField()[patchI];
                label faceStart = pf.patch().start();
 
                forAll(pf, faceI)
                {
                    allValues[faceStart++] = pf[faceI];
                }
            }
 
            mapper_.distribute(allValues);
            newValues.transfer(allValues);
 
            break;
        }
        default:
        {
            FatalErrorInFunction
             << "Unknown sampling mode: " << mapper_.mode()
             << nl << abort(FatalError);
        }
    }
 
    if (setAverage_)
    {
        Type averagePsi =
            gSum(patchField_.patch().magSf()*newValues)
           /gSum(patchField_.patch().magSf());
 
        if (mag(averagePsi)/mag(average_) > 0.5)
        {
            newValues *= mag(average_)/mag(averagePsi);
        }
        else
        {
            newValues += (average_ - averagePsi);
        }
    }
 
    // Restore tag
    UPstream::msgType() = oldTag;
 
    return tnewValues;
}
 
 
template<class Type>
void mappedPatchFieldBase<Type>::write(Ostream& os) const
{
    os.writeKeyword("fieldName") << fieldName_ << token::END_STATEMENT << nl;
    os.writeKeyword("setAverage") << setAverage_ << token::END_STATEMENT << nl;
    os.writeKeyword("average") << average_ << token::END_STATEMENT << nl;
    os.writeKeyword("interpolationScheme") << interpolationScheme_
        << token::END_STATEMENT << nl;
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// ************************************************************************* //