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/*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2016 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 "MapLagrangianFields.H"
#include "passiveParticleCloud.H"
#include "meshSearch.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
namespace Foam
{
static const scalar perturbFactor = 1e-6;
// Special version of findCell that generates a cell guaranteed to be
// compatible with tracking.
static label findCell(const Cloud<passiveParticle>& cloud, const point& pt)
{
label celli = -1;
label tetFacei = -1;
label tetPtI = -1;
const polyMesh& mesh = cloud.pMesh();
mesh.findCellFacePt(pt, celli, tetFacei, tetPtI);
if (celli >= 0)
{
return celli;
}
else
{
// See if particle on face by finding nearest face and shifting
// particle.
meshSearch meshSearcher
(
mesh,
polyMesh::FACE_PLANES // no decomposition needed
);
label facei = meshSearcher.findNearestBoundaryFace(pt);
if (facei >= 0)
{
const point& cc = mesh.cellCentres()[mesh.faceOwner()[facei]];
const point perturbPt = (1-perturbFactor)*pt+perturbFactor*cc;
mesh.findCellFacePt(perturbPt, celli, tetFacei, tetPtI);
return celli;
}
}
return -1;
}
void mapLagrangian(const meshToMesh& interp)
{
// Determine which particles are in meshTarget
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
const polyMesh& meshSource = interp.srcRegion();
const polyMesh& meshTarget = interp.tgtRegion();
const labelListList& sourceToTarget = interp.srcToTgtCellAddr();
const pointField& targetCc = meshTarget.cellCentres();
fileNameList cloudDirs
(
readDir
(
meshSource.time().timePath()/cloud::prefix,
fileName::DIRECTORY
)
);
forAll(cloudDirs, cloudI)
{
// Search for list of lagrangian objects for this time
IOobjectList objects
(
meshSource,
meshSource.time().timeName(),
cloud::prefix/cloudDirs[cloudI]
);
IOobject* positionsPtr = objects.lookup(word("positions"));
if (positionsPtr)
{
Info<< nl << " processing cloud " << cloudDirs[cloudI] << endl;
// Read positions & cell
passiveParticleCloud sourceParcels
(
meshSource,
cloudDirs[cloudI],
false
);
Info<< " read " << sourceParcels.size()
<< " parcels from source mesh." << endl;
// Construct empty target cloud
passiveParticleCloud targetParcels
(
meshTarget,
cloudDirs[cloudI],
IDLList<passiveParticle>()
);
particle::TrackingData<passiveParticleCloud> td(targetParcels);
label sourceParticleI = 0;
// Indices of source particles that get added to targetParcels
DynamicList<label> addParticles(sourceParcels.size());
// Unmapped particles
labelHashSet unmappedSource(sourceParcels.size());
// Initial: track from fine-mesh cell centre to particle position
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// This requires there to be no boundary in the way.
forAllConstIter(Cloud<passiveParticle>, sourceParcels, iter)
{
bool foundCell = false;
// Assume that cell from read parcel is the correct one...
if (iter().cell() >= 0)
{
const labelList& targetCells =
sourceToTarget[iter().cell()];
// Particle probably in one of the targetcells. Try
// all by tracking from their cell centre to the parcel
// position.
forAll(targetCells, i)
{
// Track from its cellcentre to position to make sure.
autoPtr<passiveParticle> newPtr
(
new passiveParticle
(
meshTarget,
targetCc[targetCells[i]],
targetCells[i]
)
);
passiveParticle& newP = newPtr();
label facei = newP.track(iter().position(), td);
if (facei < 0 && newP.cell() >= 0)
{
// Hit position.
foundCell = true;
addParticles.append(sourceParticleI);
targetParcels.addParticle(newPtr.ptr());
break;
}
}
}
if (!foundCell)
{
// Store for closer analysis
unmappedSource.insert(sourceParticleI);
}
sourceParticleI++;
}
Info<< " after meshToMesh addressing found "
<< targetParcels.size()
<< " parcels in target mesh." << endl;
// Do closer inspection for unmapped particles
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
if (unmappedSource.size())
{
sourceParticleI = 0;
forAllIter(Cloud<passiveParticle>, sourceParcels, iter)
{
if (unmappedSource.found(sourceParticleI))
{
label targetCell =
findCell(targetParcels, iter().position());
if (targetCell >= 0)
{
unmappedSource.erase(sourceParticleI);
addParticles.append(sourceParticleI);
iter().cell() = targetCell;
targetParcels.addParticle
(
sourceParcels.remove(&iter())
);
}
}
sourceParticleI++;
}
}
addParticles.shrink();
Info<< " after additional mesh searching found "
<< targetParcels.size() << " parcels in target mesh." << endl;
if (addParticles.size())
{
IOPosition<passiveParticleCloud>(targetParcels).write();
// addParticles now contains the indices of the sourceMesh
// particles that were appended to the target mesh.
// Map lagrangian fields
// ~~~~~~~~~~~~~~~~~~~~~
MapLagrangianFields<label>
(
cloudDirs[cloudI],
objects,
meshTarget,
addParticles
);
MapLagrangianFields<scalar>
(
cloudDirs[cloudI],
objects,
meshTarget,
addParticles
);
MapLagrangianFields<vector>
(
cloudDirs[cloudI],
objects,
meshTarget,
addParticles
);
MapLagrangianFields<sphericalTensor>
(
cloudDirs[cloudI],
objects,
meshTarget,
addParticles
);
MapLagrangianFields<symmTensor>
(
cloudDirs[cloudI],
objects,
meshTarget,
addParticles
);
MapLagrangianFields<tensor>
(
cloudDirs[cloudI],
objects,
meshTarget,
addParticles
);
}
}
}
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
} // End namespace Foam
// ************************************************************************* //
|
