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ENH: blockMesh: stabilise multi-surface intersection. Fixes #730.

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mattijs
2018-02-07 17:57:50 +00:00
parent 4432ca2ef1
commit e27e566345
1 changed files with 45 additions and 42 deletions
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87
src/meshTools/searchableSurfaces/searchableSurfacesQueries/searchableSurfacesQueries.C
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@ -3,7 +3,7 @@
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2011-2017 OpenFOAM Foundation
\\/ M anipulation | Copyright (C) 2015-2017 OpenCFD Ltd.
\\/ M anipulation | Copyright (C) 2015-2018 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -483,67 +483,70 @@ void Foam::searchableSurfacesQueries::findNearest
near[i] = info[i].hitPoint();
}
}
// Store normal as constraint
constraint.setSize(near.size());
if (surfacesToTest.size() == 1)
constraint = pointConstraint();
forAll(constraint, i)
{
constraint = pointConstraint();
forAll(info, i)
if (info[i].hit())
{
if (info[i].hit())
{
constraint[i].applyConstraint(normal[i]);
}
constraint[i].applyConstraint(normal[i]);
}
}
else if (surfacesToTest.size() >= 2)
if (surfacesToTest.size() >= 2)
{
// Work space
pointField near1;
//pointField near1;
vectorField normal1;
label surfi = 1;
for (label iter = 0; iter < nIter; iter++)
{
constraint = pointConstraint();
forAll(constraint, i)
{
if (info[i].hit())
{
constraint[i].applyConstraint(normal[i]);
}
}
// Find intersection with next surface
// Find nearest on next surface
const searchableSurface& s = allSurfaces[surfacesToTest[surfi]];
// Update: info, normal1
s.findNearest(near, distSqr, info);
s.getNormal(info, normal1);
near1.setSize(info.size());
forAll(info, i)
// Move to intersection of
// - previous surface(s) : near+normal
// - current surface : info+normal1
forAll(near, i)
{
if (info[i].hit())
if (info[i].hit() && normal[i] != vector::zero)
{
near1[i] = info[i].hitPoint();
}
}
if (mag(normal[i]&normal1[i]) < 1.0-1e-6)
{
plane pl0(near[i], normal[i], false);
plane pl1(info[i].hitPoint(), normal1[i], false);
// Move to intersection
forAll(near, pointi)
{
if (info[pointi].hit())
{
plane pl0(near[pointi], normal[pointi]);
plane pl1(near1[pointi], normal1[pointi]);
plane::ray r(pl0.planeIntersect(pl1));
vector n = r.dir() / mag(r.dir());
plane::ray r(pl0.planeIntersect(pl1));
vector n = r.dir() / mag(r.dir());
vector d(r.refPoint()-near[pointi]);
d -= (d&n)*n;
// Calculate vector to move onto intersection line
vector d(r.refPoint()-near[i]);
d -= (d&n)*n;
near[pointi] += d;
normal[pointi] = normal1[pointi];
constraint[pointi].applyConstraint(normal1[pointi]);
// Trim the max distance
scalar magD = mag(d);
if (magD > SMALL)
{
scalar maxDist = Foam::sqrt(distSqr[i]);
if (magD > maxDist)
{
// Clip
d /= magD;
d *= maxDist;
}
near[i] += d;
normal[i] = normal1[i];
constraint[i].applyConstraint(normal1[i]);
}
}
}
}