4c223b8aee
This reference represents unnecessary storage. The mesh can be obtained from tracking data or passed to the particle evolution functions by argument. In addition, removing the mesh reference makes it possible to construct as particle from an Istream without the need for an iNew class. This simplifies stream-based transfer, and makes it possible for particles to be communicated by a polyDistributionMap.
319 lines
10 KiB
C++
319 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 | Website: https://openfoam.org
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\\ / A nd | Copyright (C) 2011-2022 OpenFOAM Foundation
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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
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the Free Software Foundation, either version 3 of the License, or
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(at your 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, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "MapLagrangianFields.H"
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#include "passiveParticleCloud.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 Cloud<passiveParticle>& cloud, const point& pt)
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{
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label celli = -1;
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label tetFacei = -1;
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label tetPtI = -1;
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const polyMesh& mesh = cloud.pMesh();
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mesh.findCellFacePt(pt, celli, tetFacei, tetPtI);
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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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meshSearch meshSearcher
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(
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mesh,
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polyMesh::FACE_PLANES // no decomposition needed
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);
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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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mesh.findCellFacePt(perturbPt, celli, tetFacei, tetPtI);
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return celli;
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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& interp)
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{
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// Determine which particles are in meshTarget
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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const polyMesh& meshSource = interp.srcRegion();
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const polyMesh& meshTarget = interp.tgtRegion();
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const labelListList& sourceToTarget = interp.srcToTgtCellAddr();
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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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fileType::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(word("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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passiveParticleCloud 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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passiveParticleCloud 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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passiveParticle::trackingData td(targetParcels);
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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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sourceToTarget[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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meshTarget,
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barycentric(1, 0, 0, 0),
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targetCells[i],
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meshTarget.cells()[targetCells[i]][0],
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1
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)
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);
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passiveParticle& newP = newPtr();
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newP.track
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(
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meshTarget,
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iter().position(meshSource)
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- newP.position(meshTarget),
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0
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);
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if (!newP.onFace())
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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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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
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(
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targetParcels,
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iter().position(meshSource)
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);
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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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targetParcels.addParticle
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(
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new passiveParticle
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(
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meshTarget,
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iter().position(meshSource),
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targetCell
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)
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);
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sourceParcels.remove(&iter());
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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<passiveParticleCloud>(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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(
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cloudDirs[cloudI],
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objects,
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meshTarget,
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addParticles
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);
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MapLagrangianFields<scalar>
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(
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cloudDirs[cloudI],
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objects,
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meshTarget,
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addParticles
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);
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MapLagrangianFields<vector>
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(
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cloudDirs[cloudI],
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objects,
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meshTarget,
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addParticles
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);
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MapLagrangianFields<sphericalTensor>
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(
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cloudDirs[cloudI],
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objects,
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meshTarget,
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addParticles
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);
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MapLagrangianFields<symmTensor>
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(
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cloudDirs[cloudI],
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objects,
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meshTarget,
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addParticles
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);
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MapLagrangianFields<tensor>
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(
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cloudDirs[cloudI],
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objects,
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meshTarget,
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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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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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} // End namespace Foam
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// ************************************************************************* //
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