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Adding relaxation calculation that adjusts to changes in runTime controls during a run. Experimenting with primary alignment rotations to achieve boundary alignment. Altering template depth back to 60 after master merge conflict resolution.

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This commit is contained in:
graham
2009-01-21 17:48:27 +00:00
parent e5f370136d
commit fbe607811a
3 changed files with 177 additions and 50 deletions
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190
applications/utilities/mesh/generation/CV3DMesher/CV3D.C
View File

@ -228,6 +228,8 @@ void Foam::CV3D::setVertexAlignmentDirections()
{
alignmentDirections.setSize(0);
}
vit->alignmentDirections() = alignmentDirections;
}
}
}
@ -259,9 +261,9 @@ Foam::scalar Foam::CV3D::alignmentDistanceWeight(scalar dist) const
Foam::scalar Foam::CV3D::faceAreaWeight(scalar faceArea) const
{
scalar fl2 = 0.2;
scalar fl2 = 0.36;
scalar fu2 = 1.0;
scalar fu2 = 0.8;
scalar m2 = controls_.minCellSize2;
@ -533,11 +535,95 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
dualVertices.setSize(dualVerti);
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// loop around the Delaunay edges to construct the dual faces.
// Find the face-centre and use it to calculate the displacement vector
// contribution to the Delaunay vertices (Dv) attached to the edge. Add the
// contribution to the running displacement vector of each Dv.
// for
// (
// Triangulation::Finite_edges_iterator eit = finite_edges_begin();
// eit != finite_edges_end();
// ++eit
// )
// {
// if
// (
// eit->first->vertex(eit->second)->internalOrBoundaryPoint()
// && eit->first->vertex(eit->third)->internalOrBoundaryPoint()
// )
// {
// 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();
// face dualFace(verticesOnFace);
// Cell_handle c = eit->first;
// Vertex_handle vA = c->vertex(eit->second);
// Vertex_handle vB = c->vertex(eit->third);
// point dVA = topoint(vA->point());
// point dVB = topoint(vB->point());
// point dualFaceCentre(dualFace.centre(dualVertices));
// vector rAB = dVA - dVB;
// scalar rABMag = mag(rAB);
// scalar faceArea = dualFace.mag(dualVertices);
// scalar directStiffness = 2.0;
// scalar transverseStiffness = 0.0001;
// scalar r0 = 0.9*controls_.minCellSize;
// vector dA = -directStiffness*(1 - r0/rABMag)
// *faceAreaWeight(faceArea)*rAB;
// vector dT = transverseStiffness*faceAreaWeight(faceArea)
// *(dualFaceCentre - 0.5*(dVA - dVB));
// if (vA->internalPoint())
// {
// displacementAccumulator[vA->index()] += (dA + dT);
// }
// if (vB->internalPoint())
// {
// displacementAccumulator[vB->index()] += (-dA + dT);
// }
// }
// }
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Rotate faces that are sufficiently large and well enough aligned with the
// cell alignment direction(s)
for
(
Triangulation::Finite_edges_iterator eit = finite_edges_begin();
@ -563,7 +649,7 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
if (cc->cellIndex() < 0)
{
FatalErrorIn("Foam::CV3D::relaxPoints")
<< "Dual face uses circumcenter defined by a "
<< "Dual face uses circumcenter defined by a "
<< " Delaunay tetrahedron with no internal "
<< "or boundary points."
<< exit(FatalError);
@ -584,37 +670,83 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
point dVA = topoint(vA->point());
point dVB = topoint(vB->point());
point dualFaceCentre(dualFace.centre(dualVertices));
vector rAB = dVA - dVB;
scalar rABMag = mag(rAB);
scalar faceArea = dualFace.mag(dualVertices);
scalar directStiffness = 2.0;
scalar transverseStiffness = 0.0001;
scalar r0 = 0.9*controls_.minCellSize;
vector dA = -directStiffness*(1 - r0/rABMag)
*faceAreaWeight(faceArea)*rAB;
vector dT = transverseStiffness*faceAreaWeight(faceArea)
*(dualFaceCentre - 0.5*(dVA - dVB));
if (vA->internalPoint())
if
(
vA->alignmentDirections().size() > 0
|| vB->alignmentDirections().size() > 0
)
{
displacementAccumulator[vA->index()] += (dA + dT);
}
if (vB->internalPoint())
{
displacementAccumulator[vB->index()] += (-dA + dT);
vector alignmentDir;
if
(
vA->alignmentDirections().size() > 0
&& vB->alignmentDirections().size() == 0
)
{
alignmentDir = vA->alignmentDirections()[0];
}
else if
(
vA->alignmentDirections().size() == 0
&& vB->alignmentDirections().size() > 0
)
{
alignmentDir = vB->alignmentDirections()[0];
}
else
{
// Both vertices have an alignment
alignmentDir = vA->alignmentDirections()[0]
- vB->alignmentDirections()[0];
if (mag(alignmentDir) < SMALL)
{
alignmentDir = vA->alignmentDirections()[0];
}
alignmentDir /= mag(alignmentDir);
}
vector rAB = dVA - dVB;
scalar rABMag = mag(rAB);
if ((rAB & alignmentDir) < 0)
{
// swap the direction of the alignment so that has the same
// sense as rAB
alignmentDir *= -1;
}
scalar cosAcceptanceAngle = 0.743;
if (((rAB/rABMag) & alignmentDir) > cosAcceptanceAngle)
{
alignmentDir *= 0.5*controls_.minCellSize;
vector delta = alignmentDir - 0.5*rAB;
scalar faceArea = dualFace.mag(dualVertices);
delta *= faceAreaWeight(faceArea);
if (vA->internalPoint())
{
displacementAccumulator[vA->index()] += delta;
}
if (vB->internalPoint())
{
displacementAccumulator[vB->index()] += -delta;
}
}
}
}
}
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
vector totalDisp = sum(displacementAccumulator);
scalar totalDist = sum(mag(displacementAccumulator));

35
applications/utilities/mesh/generation/CV3DMesher/CV3DMesher.C
View File

@ -92,31 +92,16 @@ int main(int argc, char *argv[])
mesh.boundaryConform();
}
scalar relaxation =
mesh.meshingControls().relaxationFactorStart;
label nIterations = label
(
(runTime.endTime().value() - runTime.startTime().value())
/runTime.deltaT().value()
);
scalar relaxationDelta =
(
mesh.meshingControls().relaxationFactorStart
- mesh.meshingControls().relaxationFactorEnd
)
/max(nIterations, 1);
scalar relaxation = mesh.meshingControls().relaxationFactorStart;
while (runTime.run())
{
runTime++;
Info<< nl
<< "Relaxation iteration " << runTime.timeIndex() << nl
<< "~~~~~~~~~~~~~~~~~~~~~~~~" << endl;
Info<< "relaxation = " << relaxation << endl;
<< "Time = " << runTime.timeName()
<< nl << "relaxation = " << relaxation
<< endl;
mesh.relaxPoints(relaxation);
@ -124,7 +109,17 @@ int main(int argc, char *argv[])
mesh.insertSurfacePointPairs();
mesh.boundaryConform();
relaxation -= relaxationDelta;
relaxation -= (relaxation - mesh.meshingControls().relaxationFactorEnd)
/max
(
(runTime.endTime().value() - runTime.timeOutputValue())
/runTime.deltaT().value(),
1
);
Info<< "ExecutionTime = " << runTime.elapsedCpuTime() << " s"
<< " ClockTime = " << runTime.elapsedClockTime() << " s"
<< nl << endl;
}
mesh.write();

2
wmake/rules/linux64Gcc/c++
View File

@ -6,7 +6,7 @@ CC = g++ -m64
include $(RULES)/c++$(WM_COMPILE_OPTION)
ptFLAGS = -DNoRepository -ftemplate-depth-40
ptFLAGS = -DNoRepository -ftemplate-depth-60
c++FLAGS = $(GFLAGS) $(c++WARN) $(c++OPT) $(c++DBUG) $(ptFLAGS) $(LIB_HEADER_DIRS) -fPIC