364 lines
9.5 KiB
C
364 lines
9.5 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 held by original author
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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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Tries to figure out what the refinement level is on refined cartesian
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meshes. Run BEFORE snapping.
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Writes
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- volScalarField 'refinementLevel' with current refinement level.
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- cellSet 'refCells' which are the cells that need to be refined to satisfy
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2:1 refinement.
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Works by dividing cells into volume bins.
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\*---------------------------------------------------------------------------*/
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#include "argList.H"
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#include "Time.H"
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#include "polyMesh.H"
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#include "cellSet.H"
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#include "SortableList.H"
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#include "labelIOList.H"
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#include "fvMesh.H"
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#include "volFields.H"
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using namespace Foam;
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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// Return true if any cells had to be split to keep a difference between
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// neighbouring refinement levels < limitDiff. Puts cells into refCells and
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// update refLevel to account for refinement.
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bool limitRefinementLevel
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(
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const primitiveMesh& mesh,
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labelList& refLevel,
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cellSet& refCells
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)
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{
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const labelListList& cellCells = mesh.cellCells();
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label oldNCells = refCells.size();
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forAll(cellCells, cellI)
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{
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const labelList& cCells = cellCells[cellI];
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forAll(cCells, i)
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{
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if (refLevel[cCells[i]] > (refLevel[cellI]+1))
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{
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// Found neighbour with >=2 difference in refLevel.
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refCells.insert(cellI);
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refLevel[cellI]++;
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break;
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}
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}
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}
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if (refCells.size() > oldNCells)
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{
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Info<< "Added an additional " << refCells.size() - oldNCells
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<< " cells to satisfy 1:2 refinement level"
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<< endl;
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return true;
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}
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else
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{
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return false;
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}
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}
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// Main program:
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int main(int argc, char *argv[])
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{
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argList::validOptions.insert("readLevel", "");
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# include "setRootCase.H"
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# include "createTime.H"
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# include "createPolyMesh.H"
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Info<< "Dividing cells into bins depending on cell volume.\nThis will"
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<< " correspond to refinement levels for a mesh with only 2x2x2"
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<< " refinement\n"
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<< "The upper range for every bin is always 1.1 times the lower range"
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<< " to allow for some truncation error."
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<< nl << endl;
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bool readLevel = args.optionFound("readLevel");
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const scalarField& vols = mesh.cellVolumes();
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SortableList<scalar> sortedVols(vols);
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// All cell labels, sorted per bin.
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DynamicList<DynamicList<label> > bins;
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// Lower/upper limits
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DynamicList<scalar> lowerLimits;
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DynamicList<scalar> upperLimits;
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// Create bin0. Have upperlimit as factor times lowerlimit.
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bins.append(DynamicList<label>());
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lowerLimits.append(sortedVols[0]);
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upperLimits.append(1.1*lowerLimits[lowerLimits.size()-1]);
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forAll(sortedVols, i)
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{
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if (sortedVols[i] > upperLimits[upperLimits.size()-1])
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{
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// New value outside of current bin
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// Shrink old bin.
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DynamicList<label>& bin = bins[bins.size()-1];
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bin.shrink();
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Info<< "Collected " << bin.size() << " elements in bin "
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<< lowerLimits[lowerLimits.size()-1] << " .. "
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<< upperLimits[upperLimits.size()-1] << endl;
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// Create new bin.
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bins.append(DynamicList<label>());
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lowerLimits.append(sortedVols[i]);
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upperLimits.append(1.1*lowerLimits[lowerLimits.size()-1]);
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Info<< "Creating new bin " << lowerLimits[lowerLimits.size()-1]
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<< " .. " << upperLimits[upperLimits.size()-1]
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<< endl;
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}
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// Append to current bin.
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DynamicList<label>& bin = bins[bins.size()-1];
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bin.append(sortedVols.indices()[i]);
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}
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Info<< endl;
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bins[bins.size()-1].shrink();
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bins.shrink();
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lowerLimits.shrink();
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upperLimits.shrink();
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//
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// Write to cellSets.
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//
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Info<< "Volume bins:" << nl;
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forAll(bins, binI)
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{
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const DynamicList<label>& bin = bins[binI];
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cellSet cells(mesh, "vol" + name(binI), bin.size());
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forAll(bin, i)
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{
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cells.insert(bin[i]);
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}
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Info<< " " << lowerLimits[binI] << " .. " << upperLimits[binI]
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<< " : writing " << bin.size() << " cells to cellSet "
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<< cells.name() << endl;
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cells.write();
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}
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//
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// Convert bins into refinement level.
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//
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// Construct fvMesh to be able to construct volScalarField
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fvMesh fMesh
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(
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IOobject
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(
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fvMesh::defaultRegion,
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runTime.timeName(),
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runTime
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),
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xferCopy(mesh.points()), // could we safely re-use the data?
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xferCopy(mesh.faces()),
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xferCopy(mesh.cells())
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);
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// Add the boundary patches
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const polyBoundaryMesh& patches = mesh.boundaryMesh();
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List<polyPatch*> p(patches.size());
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forAll (p, patchI)
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{
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p[patchI] = patches[patchI].clone(fMesh.boundaryMesh()).ptr();
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}
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fMesh.addFvPatches(p);
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// Refinement level
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IOobject refHeader
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(
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"refinementLevel",
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runTime.timeName(),
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polyMesh::defaultRegion,
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runTime
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);
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if (!readLevel && refHeader.headerOk())
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{
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WarningIn(args.executable())
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<< "Detected " << refHeader.name() << " file in "
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<< polyMesh::defaultRegion << " directory. Please remove to"
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<< " recreate it or use the -readLevel option to use it"
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<< endl;
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return 1;
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}
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labelIOList refLevel
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(
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IOobject
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(
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"refinementLevel",
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runTime.timeName(),
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mesh,
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IOobject::NO_READ,
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IOobject::AUTO_WRITE
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),
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labelList(mesh.nCells(), 0)
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);
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if (readLevel)
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{
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refLevel = labelIOList(refHeader);
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}
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// Construct volScalarField with same info for post processing
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volScalarField postRefLevel
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(
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IOobject
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(
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"refinementLevel",
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runTime.timeName(),
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mesh,
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IOobject::NO_READ,
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IOobject::NO_WRITE
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),
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fMesh,
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dimensionedScalar("zero", dimless/dimTime, 0)
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);
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// Set cell values
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forAll(bins, binI)
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{
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const DynamicList<label>& bin = bins[binI];
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forAll(bin, i)
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{
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refLevel[bin[i]] = bins.size() - binI - 1;
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postRefLevel[bin[i]] = refLevel[bin[i]];
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}
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}
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// For volScalarField: set boundary values to same as cell.
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// Note: could also put
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// zeroGradient b.c. on postRefLevel and do evaluate.
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forAll(postRefLevel.boundaryField(), patchI)
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{
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const polyPatch& pp = patches[patchI];
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fvPatchScalarField& bField = postRefLevel.boundaryField()[patchI];
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Info<< "Setting field for patch "<< endl;
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forAll(bField, faceI)
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{
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label own = mesh.faceOwner()[pp.start() + faceI];
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bField[faceI] = postRefLevel[own];
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}
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}
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Info<< "Determined current refinement level and writing to "
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<< postRefLevel.name() << " (as volScalarField; for post processing)"
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<< nl
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<< polyMesh::defaultRegion/refLevel.name()
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<< " (as labelIOList; for meshing)" << nl
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<< endl;
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refLevel.write();
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postRefLevel.write();
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// Find out cells to refine to keep to 2:1 refinement level restriction
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// Cells to refine
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cellSet refCells(mesh, "refCells", 100);
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while
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(
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limitRefinementLevel
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(
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mesh,
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refLevel, // current refinement level
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refCells // cells to refine
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)
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)
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{}
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if (refCells.size())
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{
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Info<< "Collected " << refCells.size() << " cells that need to be"
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<< " refined to get closer to overall 2:1 refinement level limit"
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<< nl
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<< "Written cells to be refined to cellSet " << refCells.name()
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<< nl << endl;
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refCells.write();
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Info<< "After refinement this tool can be run again to see if the 2:1"
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<< " limit is observed all over the mesh" << nl << endl;
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}
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else
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{
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Info<< "All cells in the mesh observe the 2:1 refinement level limit"
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<< nl << endl;
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}
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Info << nl << "End" << endl;
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return 0;
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}
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// ************************************************************************* //
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