facGrad.C

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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     \\/     M anipulation  |
-------------------------------------------------------------------------------
    Copyright (C) 2016-2017 Wikki Ltd
    Copyright (C) 2023 OpenCFD Ltd.
-------------------------------------------------------------------------------
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 "facGrad.H"
#include "areaFields.H"
#include "edgeFields.H"
#include "facEdgeIntegrate.H"
#include "faMesh.H"
#include "faGradScheme.H"
#include "gaussFaGrad.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace fac
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
template<class Type>
tmp
<
    GeometricField
    <
        typename outerProduct<vector, Type>::type, faPatchField, areaMesh
    >
>
grad
(
    const GeometricField<Type, faePatchField, edgeMesh>& ssf
)
{
    return fa::gaussGrad<Type>::gradf(ssf, "grad(" + ssf.name() + ')');
}
 
 
template<class Type>
tmp
<
    GeometricField
    <
        typename outerProduct<vector,Type>::type, faPatchField, areaMesh
    >
>
grad
(
    const tmp<GeometricField<Type, faePatchField, edgeMesh>>& tssf
)
{
    typedef typename outerProduct<vector, Type>::type GradType;
    tmp<GeometricField<GradType, faPatchField, areaMesh>> Grad
    (
        fac::grad(tssf())
    );
    tssf.clear();
    return Grad;
}
 
 
template<class Type>
tmp
<
    GeometricField
    <
        typename outerProduct<vector,Type>::type, faPatchField, areaMesh
    >
>
grad
(
    const GeometricField<Type, faPatchField, areaMesh>& vf,
    const word& name
)
{
    typedef typename outerProduct<vector,Type>::type GradType;
    typedef GeometricField<GradType, faPatchField, areaMesh> GradFieldType;
 
    tmp<GradFieldType> tgGrad
    (
        fa::gradScheme<Type>::New
        (
            vf.mesh(),
            vf.mesh().gradScheme(name)
        )
        .cref()  // const ref to tmp contents
        .grad(vf).ptr()  // steal ptr or deep copy of cached gradient
    );
    auto& gGrad = tgGrad.ref();
 
    const areaVectorField& n = vf.mesh().faceAreaNormals();
    gGrad -= n*(n & gGrad);
    gGrad.correctBoundaryConditions();
 
    return tgGrad;
}
 
 
template<class Type>
tmp
<
    GeometricField
    <
        typename outerProduct<vector,Type>::type, faPatchField, areaMesh
    >
>
grad
(
    const tmp<GeometricField<Type, faPatchField, areaMesh>>& tvf,
    const word& name
)
{
    tmp
    <
        GeometricField
        <
            typename outerProduct<vector, Type>::type, faPatchField, areaMesh
        >
    > tGrad
    (
        fac::grad(tvf(), name)
    );
    tvf.clear();
    return tGrad;
}
 
 
template<class Type>
tmp
<
    GeometricField
    <
        typename outerProduct<vector,Type>::type, faPatchField, areaMesh
    >
>
grad
(
    const GeometricField<Type, faPatchField, areaMesh>& vf
)
{
    return fac::grad(vf, "grad(" + vf.name() + ')');
}
 
 
template<class Type>
tmp
<
    GeometricField
    <
        typename outerProduct<vector,Type>::type, faPatchField, areaMesh
    >
>
grad
(
    const tmp<GeometricField<Type, faPatchField, areaMesh>>& tvf
)
{
    typedef typename outerProduct<vector, Type>::type GradType;
    tmp<GeometricField<GradType, faPatchField, areaMesh>> Grad
    (
        fac::grad(tvf())
    );
    tvf.clear();
    return Grad;
}
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace fac
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// ************************************************************************* //