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392 lines
10 KiB
C
392 lines
10 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 1991-2009 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM; if not, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Description
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Cell to face interpolation scheme. Included in fvMesh.
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\*---------------------------------------------------------------------------*/
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#include "fvMesh.H"
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#include "volFields.H"
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#include "surfaceFields.H"
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#include "demandDrivenData.H"
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#include "coupledFvPatch.H"
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#include "mathConstants.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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defineTypeNameAndDebug(surfaceInterpolation, 0);
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// * * * * * * * * * * * * * Protected Member Functions * * * * * * * * * * //
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void surfaceInterpolation::clearOut()
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{
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deleteDemandDrivenData(weightingFactors_);
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deleteDemandDrivenData(differenceFactors_);
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deleteDemandDrivenData(correctionVectors_);
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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surfaceInterpolation::surfaceInterpolation(const fvMesh& fvm)
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:
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fvSchemes(static_cast<const objectRegistry&>(fvm)),
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fvSolution(static_cast<const objectRegistry&>(fvm)),
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mesh_(fvm),
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weightingFactors_(NULL),
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differenceFactors_(NULL),
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orthogonal_(false),
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correctionVectors_(NULL)
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{}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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surfaceInterpolation::~surfaceInterpolation()
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{
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clearOut();
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}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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const surfaceScalarField& surfaceInterpolation::weights() const
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{
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if (!weightingFactors_)
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{
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makeWeights();
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}
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return (*weightingFactors_);
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}
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const surfaceScalarField& surfaceInterpolation::deltaCoeffs() const
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{
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if (!differenceFactors_)
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{
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makeDeltaCoeffs();
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}
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return (*differenceFactors_);
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}
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bool surfaceInterpolation::orthogonal() const
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{
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if (orthogonal_ == false && !correctionVectors_)
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{
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makeCorrectionVectors();
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}
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return orthogonal_;
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}
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const surfaceVectorField& surfaceInterpolation::correctionVectors() const
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{
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if (orthogonal())
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{
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FatalErrorIn("surfaceInterpolation::correctionVectors()")
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<< "cannot return correctionVectors; mesh is orthogonal"
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<< abort(FatalError);
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}
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return (*correctionVectors_);
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}
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// Do what is neccessary if the mesh has moved
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bool surfaceInterpolation::movePoints()
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{
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deleteDemandDrivenData(weightingFactors_);
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deleteDemandDrivenData(differenceFactors_);
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orthogonal_ = false;
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deleteDemandDrivenData(correctionVectors_);
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return true;
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}
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void surfaceInterpolation::makeWeights() const
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{
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if (debug)
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{
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Info<< "surfaceInterpolation::makeWeights() : "
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<< "Constructing weighting factors for face interpolation"
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<< endl;
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}
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weightingFactors_ = new surfaceScalarField
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(
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IOobject
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(
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"weightingFactors",
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mesh_.pointsInstance(),
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mesh_
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),
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mesh_,
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dimless
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);
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surfaceScalarField& weightingFactors = *weightingFactors_;
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// Set local references to mesh data
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// (note that we should not use fvMesh sliced fields at this point yet
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// since this causes a loop when generating weighting factors in
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// coupledFvPatchField evaluation phase)
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const unallocLabelList& owner = mesh_.owner();
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const unallocLabelList& neighbour = mesh_.neighbour();
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const vectorField& Cf = mesh_.faceCentres();
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const vectorField& C = mesh_.cellCentres();
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const vectorField& Sf = mesh_.faceAreas();
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// ... and reference to the internal field of the weighting factors
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scalarField& w = weightingFactors.internalField();
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forAll(owner, facei)
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{
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// Note: mag in the dot-product.
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// For all valid meshes, the non-orthogonality will be less that
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// 90 deg and the dot-product will be positive. For invalid
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// meshes (d & s <= 0), this will stabilise the calculation
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// but the result will be poor.
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scalar SfdOwn = mag(Sf[facei] & (Cf[facei] - C[owner[facei]]));
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scalar SfdNei = mag(Sf[facei] & (C[neighbour[facei]] - Cf[facei]));
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w[facei] = SfdNei/(SfdOwn + SfdNei);
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}
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forAll(mesh_.boundary(), patchi)
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{
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mesh_.boundary()[patchi].makeWeights
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(
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weightingFactors.boundaryField()[patchi]
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);
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}
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if (debug)
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{
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Info<< "surfaceInterpolation::makeWeights() : "
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<< "Finished constructing weighting factors for face interpolation"
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<< endl;
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}
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}
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void surfaceInterpolation::makeDeltaCoeffs() const
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{
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if (debug)
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{
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Info<< "surfaceInterpolation::makeDeltaCoeffs() : "
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<< "Constructing differencing factors array for face gradient"
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<< endl;
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}
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// Force the construction of the weighting factors
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// needed to make sure deltaCoeffs are calculated for parallel runs.
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weights();
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differenceFactors_ = new surfaceScalarField
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(
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IOobject
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(
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"differenceFactors_",
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mesh_.pointsInstance(),
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mesh_
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),
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mesh_,
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dimless/dimLength
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);
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surfaceScalarField& DeltaCoeffs = *differenceFactors_;
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// Set local references to mesh data
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const volVectorField& C = mesh_.C();
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const unallocLabelList& owner = mesh_.owner();
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const unallocLabelList& neighbour = mesh_.neighbour();
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const surfaceVectorField& Sf = mesh_.Sf();
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const surfaceScalarField& magSf = mesh_.magSf();
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forAll(owner, facei)
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{
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vector delta = C[neighbour[facei]] - C[owner[facei]];
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vector unitArea = Sf[facei]/magSf[facei];
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// Standard cell-centre distance form
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//DeltaCoeffs[facei] = (unitArea & delta)/magSqr(delta);
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// Slightly under-relaxed form
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//DeltaCoeffs[facei] = 1.0/mag(delta);
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// More under-relaxed form
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//DeltaCoeffs[facei] = 1.0/(mag(unitArea & delta) + VSMALL);
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// Stabilised form for bad meshes
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DeltaCoeffs[facei] = 1.0/max(unitArea & delta, 0.05*mag(delta));
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}
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forAll(DeltaCoeffs.boundaryField(), patchi)
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{
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mesh_.boundary()[patchi].makeDeltaCoeffs
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(
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DeltaCoeffs.boundaryField()[patchi]
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);
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}
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}
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void surfaceInterpolation::makeCorrectionVectors() const
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{
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if (debug)
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{
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Info<< "surfaceInterpolation::makeCorrectionVectors() : "
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<< "Constructing non-orthogonal correction vectors"
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<< endl;
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}
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correctionVectors_ = new surfaceVectorField
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(
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IOobject
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(
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"correctionVectors",
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mesh_.pointsInstance(),
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mesh_
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),
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mesh_,
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dimless
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);
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surfaceVectorField& corrVecs = *correctionVectors_;
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// Set local references to mesh data
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const volVectorField& C = mesh_.C();
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const unallocLabelList& owner = mesh_.owner();
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const unallocLabelList& neighbour = mesh_.neighbour();
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const surfaceVectorField& Sf = mesh_.Sf();
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const surfaceScalarField& magSf = mesh_.magSf();
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const surfaceScalarField& DeltaCoeffs = deltaCoeffs();
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forAll(owner, facei)
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{
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vector unitArea = Sf[facei]/magSf[facei];
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vector delta = C[neighbour[facei]] - C[owner[facei]];
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corrVecs[facei] = unitArea - delta*DeltaCoeffs[facei];
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}
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// Boundary correction vectors set to zero for boundary patches
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// and calculated consistently with internal corrections for
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// coupled patches
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forAll(corrVecs.boundaryField(), patchi)
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{
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fvsPatchVectorField& patchcorrVecs = corrVecs.boundaryField()[patchi];
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if (!patchcorrVecs.coupled())
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{
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patchcorrVecs = vector::zero;
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}
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else
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{
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const fvsPatchScalarField& patchDeltaCoeffs
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= DeltaCoeffs.boundaryField()[patchi];
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const fvPatch& p = patchcorrVecs.patch();
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vectorField patchDeltas = mesh_.boundary()[patchi].delta();
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forAll(p, patchFacei)
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{
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vector unitArea =
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Sf.boundaryField()[patchi][patchFacei]
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/magSf.boundaryField()[patchi][patchFacei];
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const vector& delta = patchDeltas[patchFacei];
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patchcorrVecs[patchFacei] =
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unitArea - delta*patchDeltaCoeffs[patchFacei];
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}
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}
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}
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scalar NonOrthogCoeff = 0.0;
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// Calculate the non-orthogonality for meshes with 1 face or more
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if (returnReduce(magSf.size(), sumOp<label>()) > 0)
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{
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NonOrthogCoeff =
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asin
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(
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min
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(
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(sum(magSf*mag(corrVecs))/sum(magSf)).value(),
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1.0
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)
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)*180.0/constant::math::pi;
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}
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if (debug)
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{
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Info<< "surfaceInterpolation::makeCorrectionVectors() : "
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<< "non-orthogonality coefficient = " << NonOrthogCoeff << " deg."
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<< endl;
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}
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//NonOrthogCoeff = 0.0;
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if (NonOrthogCoeff < 0.1)
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{
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orthogonal_ = true;
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deleteDemandDrivenData(correctionVectors_);
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}
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else
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{
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orthogonal_ = false;
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}
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if (debug)
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{
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Info<< "surfaceInterpolation::makeCorrectionVectors() : "
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<< "Finished constructing non-orthogonal correction vectors"
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<< endl;
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}
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// ************************************************************************* //
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