272 lines
9.1 KiB
C++
272 lines
9.1 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.1
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend 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 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License 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 foam-extend. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "MapLagrangianFields.H"
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#include "CloudTemplate.H"
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#include "passiveParticle.H"
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#include "meshSearch.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace Foam
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{
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static const scalar perturbFactor = 1E-6;
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// Special version of findCell that generates a cell guaranteed to be
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// compatible with tracking.
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static label findCell(const meshSearch& meshSearcher, const point& pt)
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{
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const polyMesh& mesh = meshSearcher.mesh();
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// Use tracking to find cell containing pt
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label cellI = meshSearcher.findCell(pt);
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if (cellI >= 0)
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{
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return cellI;
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}
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else
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{
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// See if particle on face by finding nearest face and shifting
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// particle.
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label faceI = meshSearcher.findNearestBoundaryFace(pt);
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if (faceI >= 0)
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{
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const point& cc = mesh.cellCentres()[mesh.faceOwner()[faceI]];
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const point perturbPt = (1-perturbFactor)*pt+perturbFactor*cc;
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return meshSearcher.findCell(perturbPt);
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}
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}
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return -1;
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}
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void mapLagrangian(const meshToMesh& meshToMeshInterp)
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{
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// Determine which particles are in meshTarget
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// target to source cell map
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const labelList& cellAddressing = meshToMeshInterp.cellAddressing();
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// Invert celladdressing to get source to target(s).
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// Note: could use sparse addressing but that is too storage inefficient
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// (Map<labelList>)
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labelListList sourceToTargets
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(
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invertOneToMany(meshToMeshInterp.fromMesh().nCells(), cellAddressing)
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);
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const fvMesh& meshSource = meshToMeshInterp.fromMesh();
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const fvMesh& meshTarget = meshToMeshInterp.toMesh();
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const pointField& targetCc = meshTarget.cellCentres();
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fileNameList cloudDirs
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(
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readDir
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(
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meshSource.time().timePath()/cloud::prefix,
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fileName::DIRECTORY
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)
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);
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forAll(cloudDirs, cloudI)
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{
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// Search for list of lagrangian objects for this time
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IOobjectList objects
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(
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meshSource,
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meshSource.time().timeName(),
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cloud::prefix/cloudDirs[cloudI]
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);
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IOobject* positionsPtr = objects.lookup("positions");
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if (positionsPtr)
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{
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Info<< nl << " processing cloud " << cloudDirs[cloudI] << endl;
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// Read positions & cell
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Cloud<passiveParticle> sourceParcels
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(
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meshSource,
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cloudDirs[cloudI],
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false
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);
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Info<< " read " << sourceParcels.size()
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<< " parcels from source mesh." << endl;
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// Construct empty target cloud
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Cloud<passiveParticle> targetParcels
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(
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meshTarget,
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cloudDirs[cloudI],
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IDLList<passiveParticle>()
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);
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label sourceParticleI = 0;
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// Indices of source particles that get added to targetParcels
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DynamicList<label> addParticles(sourceParcels.size());
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// Unmapped particles
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labelHashSet unmappedSource(sourceParcels.size());
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// Initial: track from fine-mesh cell centre to particle position
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// This requires there to be no boundary in the way.
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forAllConstIter(Cloud<passiveParticle>, sourceParcels, iter)
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{
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bool foundCell = false;
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// Assume that cell from read parcel is the correct one...
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if (iter().cell() >= 0)
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{
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const labelList& targetCells =
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sourceToTargets[iter().cell()];
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// Particle probably in one of the targetcells. Try
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// all by tracking from their cell centre to the parcel
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// position.
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forAll(targetCells, i)
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{
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// Track from its cellcentre to position to make sure.
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autoPtr<passiveParticle> newPtr
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(
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new passiveParticle
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(
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targetParcels,
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targetCc[targetCells[i]],
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targetCells[i]
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)
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);
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passiveParticle& newP = newPtr();
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scalar fraction = 0;
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label faceI = newP.track(iter().position(), fraction);
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if (faceI < 0 && newP.cell() >= 0)
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{
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// Hit position.
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foundCell = true;
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addParticles.append(sourceParticleI);
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targetParcels.addParticle(newPtr.ptr());
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break;
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}
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}
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}
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if (!foundCell)
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{
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// Store for closer analysis
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unmappedSource.insert(sourceParticleI);
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}
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sourceParticleI++;
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}
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Info<< " after meshToMesh addressing found "
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<< targetParcels.size()
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<< " parcels in target mesh." << endl;
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// Do closer inspection for unmapped particles
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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if (unmappedSource.size())
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{
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meshSearch targetSearcher(meshTarget, false);
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sourceParticleI = 0;
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forAllIter(Cloud<passiveParticle>, sourceParcels, iter)
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{
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if (unmappedSource.found(sourceParticleI))
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{
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label targetCell =
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findCell(targetSearcher, iter().position());
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if (targetCell >= 0)
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{
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unmappedSource.erase(sourceParticleI);
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addParticles.append(sourceParticleI);
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iter().cell()=targetCell;
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targetParcels.addParticle
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(
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sourceParcels.remove(&iter())
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);
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}
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}
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sourceParticleI++;
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}
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}
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addParticles.shrink();
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Info<< " after additional mesh searching found "
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<< targetParcels.size() << " parcels in target mesh." << endl;
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if (addParticles.size())
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{
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IOPosition<passiveParticle>(targetParcels).write();
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// addParticles now contains the indices of the sourceMesh
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// particles that were appended to the target mesh.
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// Map lagrangian fields
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// ~~~~~~~~~~~~~~~~~~~~~
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MapLagrangianFields<label>
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(cloudDirs[cloudI], objects, meshToMeshInterp, addParticles);
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MapLagrangianFields<scalar>
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(cloudDirs[cloudI], objects, meshToMeshInterp, addParticles);
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MapLagrangianFields<vector>
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(cloudDirs[cloudI], objects, meshToMeshInterp, addParticles);
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MapLagrangianFields<sphericalTensor>
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(cloudDirs[cloudI], objects, meshToMeshInterp, addParticles);
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MapLagrangianFields<symmTensor>
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(cloudDirs[cloudI], objects, meshToMeshInterp, addParticles);
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MapLagrangianFields<tensor>
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(cloudDirs[cloudI], objects, meshToMeshInterp, addParticles);
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}
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}
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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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