zhyang-dev/openfoam
1
0
Fork 0
mirror of https://develop.openfoam.com/Development/openfoam.git synced 2025-11-28 03:28:01 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Added point removal for short Delaunay edges in rotational controller as well as small and highly conntected dual cell removal.

Browse Source
This commit is contained in:
graham
2009-02-17 17:58:28 +00:00
parent 0d4433cb33
commit 8695977fc5
1 changed files with 179 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

211
applications/utilities/mesh/generation/CV3DMesher/CV3D.C
View File

@ -51,6 +51,7 @@ void Foam::CV3D::reinsertPoints(const pointField& points)
Info<< nl << "Reinserting points after motion. ";
startOfInternalPoints_ = number_of_vertices();
label nVert = startOfInternalPoints_;
// Add the points and index them
@ -660,6 +661,8 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
scalarField weightAccumulator(startOfSurfacePointPairs_, 0);
List<bool> pointToBeRetained(startOfSurfacePointPairs_, true);
label dualVerti = 0;
// Find the dual point of each tetrahedron and assign it an index.
@ -1087,16 +1090,6 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
delta *= faceAreaWeight(faceArea);
if (vA->internalPoint())
{
displacementAccumulator[vA->index()] += delta;
}
if (vB->internalPoint())
{
displacementAccumulator[vB->index()] += -delta;
}
// Point insertion criteria
if
(
rABMag > 1.55*targetCellSize
@ -1106,6 +1099,8 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
&& alignmentDotProd > 0.93
)
{
// Point insertion criteria
// Info<< nl<< "Long edge match = "
// << rABMag
// << nl << dVA
@ -1114,22 +1109,44 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
insertionPoints.append(0.5*(dVA + dVB));
}
// Point removal criteria
if
else if
(
rABMag < 0.7*targetCellSize
&& vA->internalPoint()
&& vB->internalPoint()
rABMag < 0.65*targetCellSize
&& (vA->internalPoint() || vB->internalPoint())
// && faceArea > 0.0025*targetFaceArea
// && alignmentDotProd > 0.93
)
{
Info<< nl<< "Short edge match = "
<< rABMag
<< nl << dVA
<< nl << dVB
<< endl;
// Point removal criteria
// Info<< nl<< "Short edge match = "
// << rABMag
// << nl << dVA
// << nl << dVB
// << endl;
//insertionPoints.append(0.5*(dVA + dVB));
if (vA->internalPoint())
{
pointToBeRetained[vA->index()] = false;
}
if (vB->internalPoint())
{
pointToBeRetained[vB->index()] = false;
}
}
else
{
if (vA->internalPoint())
{
displacementAccumulator[vA->index()] += delta;
}
if (vB->internalPoint())
{
displacementAccumulator[vB->index()] += -delta;
}
}
}
}
@ -1344,6 +1361,101 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Scan dual cells for those with SMALL volumes or lots of faces
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// for
// (
// Triangulation::Finite_vertices_iterator vit =
// finite_vertices_begin();
// vit != finite_vertices_end();
// vit++
// )
// {
// if (vit->internalPoint())
// {
// std::list<Edge> incidentEdges;
// incident_edges(vit, std::back_inserter(incidentEdges));
// if (incidentEdges.size() > 47)
// {
// Info<< "Highly connected cell removed "
// << nl << "incidentEdges = " << incidentEdges.size()
// << ", position = " << topoint(vit->point())
// << endl;
// pointToBeRetained[vit->index()] = false;
// }
// else
// {
// faceList faces(incidentEdges.size());
// label faceI = 0;
// labelList faceLabels(incidentEdges.size(), -1);
// for
// (
// std::list<Edge>::iterator eit = incidentEdges.begin();
// eit != incidentEdges.end();
// ++eit
// )
// {
// Cell_circulator ccStart = incident_cells(*eit);
// Cell_circulator cc = ccStart;
// DynamicList<label> verticesOnFace;
// do
// {
// if (!is_infinite(cc))
// {
// if (cc->cellIndex() < 0)
// {
// FatalErrorIn("Foam::CV3D::relaxPoints")
// << "Dual face uses circumcenter defined"
// << " by a Delaunay tetrahedron with no"
// << " internal or boundary points."
// << exit(FatalError);
// }
// verticesOnFace.append(cc->cellIndex());
// }
// } while (++cc != ccStart);
// verticesOnFace.shrink();
// faces[faceI] = face(verticesOnFace);
// faceLabels[faceI] = faceI;
// faceI++;
// }
// cell dualCell(faceLabels);
// scalar dualCellVolume = dualCell.mag(dualVertices, faces);
// scalar targetCellSize = controls_.minCellSize;
// scalar targetCellVolume = pow(targetCellSize, 3);
// if (dualCellVolume < 0.025*targetCellVolume)
// {
// Info<< "Small dual cell removed "
// << nl << "Volume = " << dualCellVolume
// << ", position = " << topoint(vit->point())
// << endl;
// pointToBeRetained[vit->index()] = false;
// }
// }
// }
// }
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// displacementAccumulator /= weightAccumulator;
vector totalDisp = sum(displacementAccumulator);
@ -1374,6 +1486,13 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
startOfInternalPoints_
);
List<bool> internalPointToBeRetained = SubList<bool>
(
pointToBeRetained,
pointToBeRetained.size() - startOfInternalPoints_,
startOfInternalPoints_
);
// Write the mesh before clearing it
if (runTime_.outputTime())
{
@ -1400,19 +1519,47 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
reinsertFeaturePoints();
reinsertPoints(internalDelaunayVertices);
Info<< nl << "Inserting " << insertionPoints.size()
<< " new points. "<< endl;
label nVert = number_of_vertices();
// Add the points and index them
forAll(insertionPoints, i)
if(runTime_.timeOutputValue() > 80)
{
const point& p = insertionPoints[i];
reinsertPoints(internalDelaunayVertices);
}
else
{
// INCLUDED FROM reinsertPoints TEMPORARILY -->
Info<< nl << "Reinserting points after motion. ";
insert(toPoint(p))->index() = nVert++;
startOfInternalPoints_ = number_of_vertices();
label nVert = startOfInternalPoints_;
// Add the points and index them
forAll(internalDelaunayVertices, i)
{
if (internalPointToBeRetained[i])
{
const point& p = internalDelaunayVertices[i];
insert(toPoint(p))->index() = nVert++;
}
}
Info<< nVert << " vertices reinserted." << nl
<< internalDelaunayVertices.size() - nVert + startOfInternalPoints_
<< " deleted." << endl;
// <-- INCLUDED FROM reinsertPoints TEMPORARILY
Info<< nl << "Inserting " << insertionPoints.size()
<< " new points. "<< endl;
// label nVert = number_of_vertices();
// Add the points and index them
forAll(insertionPoints, i)
{
const point& p = insertionPoints[i];
insertPoint(p, Vb::INTERNAL_POINT);
}
}
}