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Immersed face tolerance consistency. Inno Gatin

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This commit is contained in:
Hrvoje Jasak 2019-05-15 09:42:05 +01:00
parent a4d077f45b
commit 6c9291cd4e
1 changed files with 72 additions and 55 deletions
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127
src/immersedBoundary/immersedBoundary/immersedPoly/ImmersedFace.C
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@ -53,6 +53,14 @@ void Foam::ImmersedFace<Distance>::createSubfaces
// Count the number of newly created points, including original points
label nNewPoints = 0;
// For each point, determine if it is submerged( = -1), dry( = 1) or
// on the surface ( = 0)
// This is done during cutting to avoid using another tolerance check later
// to dermine which points are on the surface, below or above it. By
// definition, points that are a result of cutting are on the surface. (IG
// 14/May/2019)
labelList isSubmerged(facePointsAndIntersections_.size());
// Loop through all edges
forAll (edges, edgeI)
{
@ -149,6 +157,12 @@ void Foam::ImmersedFace<Distance>::createSubfaces
// Store first point depth
newDepth[nNewPoints] = depth[curEdge.start()];
// Determine whether it is above or below the surface.
// NOTE: it must be one or the other since this is an original point
// of the edge, and it passed the if statement above (IG
// 14/May/2019)
isSubmerged[nNewPoints] = sign(depth[curEdge.start()]);
nNewPoints++;
// Store the newly found cut point
@ -157,6 +171,10 @@ void Foam::ImmersedFace<Distance>::createSubfaces
// Store newly found cut depth
newDepth[nNewPoints] = depthAtCut;
// The cut point is by definition on the surface and therefore
// shared by the dry and wet face (IG 14/May/2019)
isSubmerged[nNewPoints] = 0;
nNewPoints++;
}
else
@ -168,6 +186,23 @@ void Foam::ImmersedFace<Distance>::createSubfaces
// Store first point depth
newDepth[nNewPoints] = depth[curEdge.start()];
// Determine whether it is above, below or on the surface.
// NOTE: now it can be any of the options since end or start is
// sitting on the surface, othervise the if statement above would
// have been true.(IG 14/May/2019)
if
(
mag(depth[curEdge.start()])
< edgeLength*immersedPoly::tolerance_()
)
{
isSubmerged[nNewPoints] = 0;
}
else
{
isSubmerged[nNewPoints] = sign(depth[curEdge.start()]);
}
nNewPoints++;
}
}
@ -176,50 +211,10 @@ void Foam::ImmersedFace<Distance>::createSubfaces
// be the starting point of the first edge
facePointsAndIntersections_.setSize(nNewPoints);
newDepth.setSize(nNewPoints);
isSubmerged.setSize(nNewPoints);
// Analyse new depth
// For each point, determine if it is submerged( = -1), dry( = 1) or
// on the surface ( = 0)
labelField isSubmerged(newDepth.size());
forAll (newDepth, pointI)
{
if (mag(newDepth[pointI]) < immersedPoly::tolerance_())
{
isSubmerged[pointI] = 0;
}
else
{
isSubmerged[pointI] = sign(newDepth[pointI]);
}
}
// Determine if face is on surface, fully dry, fully submerged
// or intersected by surface
label sumMagSubmerged = sum(mag(isSubmerged));
label sumSubmerged = sum(isSubmerged);
if (sumSubmerged == sumMagSubmerged)
{
// Face fully dry
drySubface_ = localFace;
wetSubface_ = face();
}
else if (sumSubmerged == -sumMagSubmerged)
{
// Face fully wet
drySubface_ = face();
wetSubface_ = localFace;
}
else if (sumMagSubmerged == 0)
{
// Face fully on surface:
// set both wet and dry face to the originial face
drySubface_ = localFace;
wetSubface_ = localFace;
}
else
// Count the number of points on wet and dry parts of the face and create
// the faces
{
// Face is intersected by surface
@ -262,11 +257,10 @@ void Foam::ImmersedFace<Distance>::createSubfaces
// than 3 points
if (nDry < 3)
{
// The face is wet
isAllWet_ = true;
isAllDry_ = false;
drySubface_.clear();
FatalErrorInFunction
<< "There are fewer than three points"
<< " on the wet part of the face."
<< abort(FatalError);
}
else
{
@ -278,11 +272,10 @@ void Foam::ImmersedFace<Distance>::createSubfaces
if (nWet < 3)
{
// The face is dry
isAllWet_ = false;
isAllDry_ = true;
wetSubface_.clear();
FatalErrorInFunction
<< "There are fewer than three points"
<< " on the dry part of the face."
<< abort(FatalError);
}
else
{
@ -326,8 +319,32 @@ Foam::ImmersedFace<Distance>::ImmersedFace
// Distance from the surface for every point of face
scalarField depth = dist_.distance(facePointsAndIntersections_);
// Calculating absolute tolerances based on minimum edge length
scalar absTol = 0.0;
{
// Use local edges
const edgeList edges = localFace.edges();
// Calculate min edge length for a quick check
scalar minEdgeLength = GREAT;
// Note: expensive calculation of min length. HJ, 28/May/2015
forAll (edges, edgeI)
{
minEdgeLength =
Foam::min
(
minEdgeLength,
edges[edgeI].mag(facePointsAndIntersections_)
);
}
absTol = minEdgeLength*immersedPoly::tolerance_();
}
// Check if all points are wet or dry, using absolute tolerance
if (max(depth) < immersedPoly::tolerance_())
if (max(depth) < absTol)
{
// All points are wet within a tolerance: face is wet
isAllWet_ = true;
@ -335,7 +352,7 @@ Foam::ImmersedFace<Distance>::ImmersedFace
wetSubface_ = localFace;
}
else if (min(depth) > -immersedPoly::tolerance_())
else if (min(depth) > -absTol)
{
// All points are dry within a tolerance: face is dry
isAllWet_ = false;