/usr/include/freefoam/finiteVolume/fourthGrad.C is in libfreefoam-dev 0.1.0+dfsg-1build1.
This file is owned by root:root, with mode 0o644.
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========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
\\/ 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 "fourthGrad.H"
#include <finiteVolume/leastSquaresGrad.H>
#include <finiteVolume/gaussGrad.H>
#include <finiteVolume/fvMesh.H>
#include <finiteVolume/volMesh.H>
#include <finiteVolume/surfaceMesh.H>
#include <OpenFOAM/GeometricField.H>
#include <finiteVolume/zeroGradientFvPatchField.H>
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace fv
{
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
template<class Type>
tmp
<
GeometricField
<
typename outerProduct<vector, Type>::type, fvPatchField, volMesh
>
>
fourthGrad<Type>::grad
(
const GeometricField<Type, fvPatchField, volMesh>& vsf
) const
{
// The fourth-order gradient is calculated in two passes. First,
// the standard least-square gradient is assembled. Then, the
// fourth-order correction is added to the second-order accurate
// gradient to complete the accuracy.
typedef typename outerProduct<vector, Type>::type GradType;
const fvMesh& mesh = vsf.mesh();
// Assemble the second-order least-square gradient
// Calculate the second-order least-square gradient
tmp<GeometricField<GradType, fvPatchField, volMesh> > tsecondfGrad
= leastSquaresGrad<Type>(mesh).grad(vsf);
const GeometricField<GradType, fvPatchField, volMesh>& secondfGrad =
tsecondfGrad();
tmp<GeometricField<GradType, fvPatchField, volMesh> > tfGrad
(
new GeometricField<GradType, fvPatchField, volMesh>
(
IOobject
(
"grad("+vsf.name()+')',
vsf.instance(),
mesh,
IOobject::NO_READ,
IOobject::NO_WRITE
),
secondfGrad
)
);
GeometricField<GradType, fvPatchField, volMesh>& fGrad = tfGrad();
const vectorField& C = mesh.C();
const surfaceScalarField& lambda = mesh.weights();
// Get reference to least square vectors
const leastSquaresVectors& lsv = leastSquaresVectors::New(mesh);
const surfaceVectorField& ownLs = lsv.pVectors();
const surfaceVectorField& neiLs = lsv.nVectors();
// owner/neighbour addressing
const unallocLabelList& own = mesh.owner();
const unallocLabelList& nei = mesh.neighbour();
// Assemble the fourth-order gradient
// Internal faces
forAll(own, facei)
{
Type dDotGradDelta = 0.5*
(
(C[nei[facei]] - C[own[facei]])
& (secondfGrad[nei[facei]] - secondfGrad[own[facei]])
);
fGrad[own[facei]] -= lambda[facei]*ownLs[facei]*dDotGradDelta;
fGrad[nei[facei]] -= (1.0 - lambda[facei])*neiLs[facei]*dDotGradDelta;
}
// Boundary faces
forAll(vsf.boundaryField(), patchi)
{
if (secondfGrad.boundaryField()[patchi].coupled())
{
const fvsPatchVectorField& patchOwnLs =
ownLs.boundaryField()[patchi];
const scalarField& lambdap = lambda.boundaryField()[patchi];
// Build the d-vectors
vectorField pd =
mesh.Sf().boundaryField()[patchi]
/(
mesh.magSf().boundaryField()[patchi]
*mesh.deltaCoeffs().boundaryField()[patchi]
);
if (!mesh.orthogonal())
{
pd -= mesh.correctionVectors().boundaryField()[patchi]
/mesh.deltaCoeffs().boundaryField()[patchi];
}
const unallocLabelList& faceCells =
fGrad.boundaryField()[patchi].patch().faceCells();
Field<GradType> neighbourSecondfGrad =
secondfGrad.boundaryField()[patchi].patchNeighbourField();
forAll(faceCells, patchFaceI)
{
fGrad[faceCells[patchFaceI]] -=
0.5*lambdap[patchFaceI]*patchOwnLs[patchFaceI]
*(
pd[patchFaceI]
& (
neighbourSecondfGrad[patchFaceI]
- secondfGrad[faceCells[patchFaceI]]
)
);
}
}
}
fGrad.correctBoundaryConditions();
gaussGrad<Type>::correctBoundaryConditions(vsf, fGrad);
return tfGrad;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace fv
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// ************************ vim: set sw=4 sts=4 et: ************************ //
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