mirror of
https://github.com/NGSolve/netgen.git
synced 2024-12-24 21:10:33 +05:00
boundary layer from python
This commit is contained in:
Joachim Schoeberl
parent
fc54444357
commit
49e108da4f
@ -13,7 +13,7 @@ namespace netgen
|
||||
cout << "Boundary Nr:";
|
||||
cin >> surfid;
|
||||
|
||||
int i, j;
|
||||
int i;
|
||||
int np = mesh.GetNP();
|
||||
|
||||
cout << "Old NP: " << mesh.GetNP() << endl;
|
||||
@ -54,7 +54,7 @@ namespace netgen
|
||||
for (i = 1; i <= mesh.GetNSE(); i++)
|
||||
{
|
||||
Element2d & el = mesh.SurfaceElement(i);
|
||||
for (j = 1; j <= el.GetNP(); j++)
|
||||
for (int j = 1; j <= el.GetNP(); j++)
|
||||
if (mapto.Get(el.PNum(j)))
|
||||
el.PNum(j) = mapto.Get(el.PNum(j));
|
||||
}
|
||||
@ -103,7 +103,7 @@ namespace netgen
|
||||
function, in order to calculate the effective direction
|
||||
in which the prismatic layer should grow
|
||||
*/
|
||||
void GetSurfaceNormal(Mesh & mesh, Element2d & el, int Vertex, Vec3d & SurfaceNormal)
|
||||
void GetSurfaceNormal(Mesh & mesh, const Element2d & el, int Vertex, Vec3d & SurfaceNormal)
|
||||
{
|
||||
int Vertex_A;
|
||||
int Vertex_B;
|
||||
@ -141,10 +141,8 @@ namespace netgen
|
||||
Currently, the layer height is calculated using:
|
||||
height = h_first_layer * (growth_factor^(num_layers - 1))
|
||||
*/
|
||||
void GenerateBoundaryLayer (Mesh & mesh, MeshingParameters & mp)
|
||||
void GenerateBoundaryLayer (Mesh & mesh, BoundaryLayerParameters & blp)
|
||||
{
|
||||
int i, j;
|
||||
|
||||
ofstream dbg("BndLayerDebug.log");
|
||||
|
||||
// Angle between a surface element and a growth-vector below which
|
||||
@ -152,70 +150,43 @@ namespace netgen
|
||||
// (in degrees)
|
||||
double angleThreshold = 5.0;
|
||||
|
||||
cout << "Generate Prismatic Boundary Layers (Experimental)...." << endl;
|
||||
|
||||
// Use an array to support creation of boundary
|
||||
// layers for multiple surfaces in the future...
|
||||
Array<int> surfid;
|
||||
int surfinp = 0;
|
||||
int prismlayers = 1;
|
||||
double hfirst = 0.01;
|
||||
double growthfactor = 1.0;
|
||||
Array<int> surfid (blp.surfid);
|
||||
int prismlayers = blp.prismlayers;
|
||||
double hfirst = blp.hfirst;
|
||||
double growthfactor = blp.growthfactor;
|
||||
|
||||
bool grow_edges = false; // grow layer at edges
|
||||
|
||||
|
||||
// Monitor and print out the number of prism and quad elements
|
||||
// added to the mesh
|
||||
int numprisms = 0;
|
||||
int numquads = 0;
|
||||
|
||||
while(surfinp >= 0)
|
||||
{
|
||||
cout << "Enter Surface ID (-1 to end list): ";
|
||||
cin >> surfinp;
|
||||
if(surfinp >= 0) surfid.Append(surfinp);
|
||||
}
|
||||
|
||||
cout << "Number of surfaces entered = " << surfid.Size() << endl;
|
||||
cout << "Selected surfaces are:" << endl;
|
||||
|
||||
for(i = 1; i <= surfid.Size(); i++)
|
||||
{
|
||||
cout << "Surface " << i << ": " << surfid.Elem(i) << endl;
|
||||
}
|
||||
|
||||
cout << endl << "Enter number of prism layers: ";
|
||||
cin >> prismlayers;
|
||||
if(prismlayers < 1) prismlayers = 1;
|
||||
|
||||
cout << "Enter height of first layer: ";
|
||||
cin >> hfirst;
|
||||
if(hfirst <= 0.0) hfirst = 0.01;
|
||||
|
||||
cout << "Enter layer growth / shrink factor: ";
|
||||
cin >> growthfactor;
|
||||
if(growthfactor <= 0.0) growthfactor = 0.5;
|
||||
|
||||
cout << "Old NP: " << mesh.GetNP() << endl;
|
||||
cout << "Old NSE: " << mesh.GetNSE() << endl;
|
||||
|
||||
for(int layer = prismlayers; layer >= 1; layer--)
|
||||
{
|
||||
cout << "Generating layer: " << layer << endl;
|
||||
{
|
||||
cout << "Generating layer: " << layer << endl;
|
||||
|
||||
const MeshTopology& meshtopo = mesh.GetTopology();
|
||||
const_cast<MeshTopology &> (meshtopo).SetBuildEdges(true);
|
||||
const_cast<MeshTopology &> (meshtopo).SetBuildFaces(true);
|
||||
const_cast<MeshTopology &> (meshtopo).Update();
|
||||
const MeshTopology& meshtopo = mesh.GetTopology();
|
||||
const_cast<MeshTopology &> (meshtopo).SetBuildEdges(true);
|
||||
const_cast<MeshTopology &> (meshtopo).SetBuildFaces(true);
|
||||
const_cast<MeshTopology &> (meshtopo).Update();
|
||||
|
||||
double layerht = hfirst;
|
||||
double layerht = hfirst;
|
||||
|
||||
if(growthfactor == 1)
|
||||
{
|
||||
layerht = layer * hfirst;
|
||||
}
|
||||
else
|
||||
{
|
||||
layerht = hfirst*(pow(growthfactor,(layer+1)) - 1)/(growthfactor - 1);
|
||||
}
|
||||
if(growthfactor == 1)
|
||||
{
|
||||
layerht = layer * hfirst;
|
||||
}
|
||||
else
|
||||
{
|
||||
layerht = hfirst*(pow(growthfactor,(layer+1)) - 1)/(growthfactor - 1);
|
||||
}
|
||||
|
||||
cout << "Layer Height = " << layerht << endl;
|
||||
|
||||
@ -230,14 +201,14 @@ namespace netgen
|
||||
int nseg = mesh.GetNSeg();
|
||||
|
||||
// Indicate which points need to be remapped
|
||||
BitArray bndnodes(np);
|
||||
BitArray bndnodes(np+1); // big enough for 1-based array
|
||||
|
||||
// Map of the old points to the new points
|
||||
Array<int> mapto(np);
|
||||
Array<PointIndex, PointIndex::BASE> mapto(np);
|
||||
|
||||
// Growth vectors for the prismatic layer based on
|
||||
// the effective surface normal at a given point
|
||||
Array<Vec3d> growthvectors(np);
|
||||
Array<Vec3d, PointIndex::BASE> growthvectors(np);
|
||||
|
||||
// Bit array to identify all the points belonging
|
||||
// to the surface of interest
|
||||
@ -250,35 +221,34 @@ namespace netgen
|
||||
// direction
|
||||
cout << "Marking points for remapping...." << endl;
|
||||
|
||||
for (i = 1; i <= nse; i++)
|
||||
{
|
||||
int snr = mesh.SurfaceElement(i).GetIndex();
|
||||
// cout << "snr = " << snr << endl;
|
||||
if (surfid.Contains(snr))
|
||||
{
|
||||
Element2d & sel = mesh.SurfaceElement(i);
|
||||
int selNP = sel.GetNP();
|
||||
for(j = 1; j <= selNP; j++)
|
||||
{
|
||||
// Set the bitarray to indicate that the
|
||||
// point is part of the required set
|
||||
bndnodes.Set(sel.PNum(j));
|
||||
for (SurfaceElementIndex si = 0; si < nse; si++)
|
||||
if (surfid.Contains(mesh[si].GetIndex()))
|
||||
{
|
||||
const Element2d & sel = mesh[si];
|
||||
for(int j = 0; j < sel.GetNP(); j++)
|
||||
{
|
||||
// Set the bitarray to indicate that the
|
||||
// point is part of the required set
|
||||
bndnodes.Set(sel[j]);
|
||||
Vec3d surfacenormal;
|
||||
|
||||
// Vec3d& surfacenormal = Vec3d(); ????
|
||||
Vec3d surfacenormal;
|
||||
// Calculate the surface normal at the current point
|
||||
// with respect to the current surface element
|
||||
GetSurfaceNormal(mesh,sel,j+1,surfacenormal);
|
||||
|
||||
// Calculate the surface normal at the current point
|
||||
// with respect to the current surface element
|
||||
GetSurfaceNormal(mesh,sel,j,surfacenormal);
|
||||
// Add the surface normal to the already existent one
|
||||
// (This gives the effective normal direction at corners
|
||||
// and curved areas)
|
||||
growthvectors[sel[j]] += surfacenormal;
|
||||
}
|
||||
}
|
||||
|
||||
// Add the surface normal to the already existent one
|
||||
// (This gives the effective normal direction at corners
|
||||
// and curved areas)
|
||||
growthvectors.Elem(sel.PNum(j)) = growthvectors.Elem(sel.PNum(j))
|
||||
+ surfacenormal;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (!grow_edges)
|
||||
for (SegmentIndex sei = 0; sei <= nseg; sei++)
|
||||
{
|
||||
bndnodes.Clear (mesh[sei][0]);
|
||||
bndnodes.Clear (mesh[sei][1]);
|
||||
}
|
||||
|
||||
// Add additional points into the mesh structure in order to
|
||||
// clone the surface elements.
|
||||
@ -286,20 +256,20 @@ namespace netgen
|
||||
// and normalize them
|
||||
cout << "Cloning points and calculating growth vectors...." << endl;
|
||||
|
||||
for (i = 1; i <= np; i++)
|
||||
{
|
||||
if (bndnodes.Test(i))
|
||||
{
|
||||
mapto.Elem(i) = mesh.AddPoint (mesh.Point (i));
|
||||
for (PointIndex pi = 1; pi <= np; pi++)
|
||||
{
|
||||
if (bndnodes.Test(pi))
|
||||
{
|
||||
mapto[pi] = mesh.AddPoint (mesh[pi]);
|
||||
|
||||
growthvectors.Elem(i).Normalize();
|
||||
growthvectors.Elem(i) *= -1.0;
|
||||
}
|
||||
else
|
||||
{
|
||||
mapto.Elem(i) = 0;
|
||||
growthvectors.Elem(i) = Vec3d(0,0,0);
|
||||
}
|
||||
growthvectors[pi].Normalize();
|
||||
growthvectors[pi] *= -1.0;
|
||||
}
|
||||
else
|
||||
{
|
||||
mapto[pi] = 0;
|
||||
growthvectors[pi] = Vec3d(0,0,0);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -314,286 +284,319 @@ namespace netgen
|
||||
|
||||
cout << "Adding 2D Quad elements on required surfaces...." << endl;
|
||||
|
||||
for (i = 1; i <= nseg; i++)
|
||||
{
|
||||
int seg_p1 = mesh.LineSegment(i)[0];
|
||||
int seg_p2 = mesh.LineSegment(i)[1];
|
||||
if (grow_edges)
|
||||
for (SegmentIndex sei = 0; sei <= nseg; sei++)
|
||||
{
|
||||
PointIndex seg_p1 = mesh[sei][0];
|
||||
PointIndex seg_p2 = mesh[sei][1];
|
||||
|
||||
// Only go in if the segment is still active, and if both its
|
||||
// surface index is part of the "hit-list"
|
||||
if(segsel.Test(i) && surfid.Contains(mesh.LineSegment(i).si))
|
||||
{
|
||||
// clear the bit to indicate that this segment has been processed
|
||||
segsel.Clear(i);
|
||||
|
||||
// Find matching segment pair on other surface
|
||||
for(j = 1; j <= nseg; j++)
|
||||
// Only go in if the segment is still active, and if both its
|
||||
// surface index is part of the "hit-list"
|
||||
if(segsel.Test(sei) && surfid.Contains(mesh[sei].si))
|
||||
{
|
||||
int segpair_p1 = mesh.LineSegment(j)[1];
|
||||
int segpair_p2 = mesh.LineSegment(j)[0];
|
||||
// clear the bit to indicate that this segment has been processed
|
||||
segsel.Clear(sei);
|
||||
|
||||
// Find the segment pair on the neighbouring surface element
|
||||
// Identified by: seg1[0] = seg_pair[1] and seg1[1] = seg_pair[0]
|
||||
if(segsel.Test(j) && ((segpair_p1 == seg_p1) && (segpair_p2 == seg_p2)))
|
||||
{
|
||||
// clear bit to indicate that processing of this segment is done
|
||||
segsel.Clear(j);
|
||||
// Find matching segment pair on other surface
|
||||
for (SegmentIndex sej = 0; sej < nseg; sej++)
|
||||
{
|
||||
PointIndex segpair_p1 = mesh[sej][1];
|
||||
PointIndex segpair_p2 = mesh[sej][0];
|
||||
|
||||
// Only worry about those surfaces which are not in the
|
||||
// boundary layer list
|
||||
if(!surfid.Contains(mesh.LineSegment(j).si))
|
||||
{
|
||||
int pnt_commelem = 0;
|
||||
Array<int> pnt1_elems;
|
||||
Array<int> pnt2_elems;
|
||||
// Find the segment pair on the neighbouring surface element
|
||||
// Identified by: seg1[0] = seg_pair[1] and seg1[1] = seg_pair[0]
|
||||
if(segsel.Test(sej) && ((segpair_p1 == seg_p1) && (segpair_p2 == seg_p2)))
|
||||
{
|
||||
// clear bit to indicate that processing of this segment is done
|
||||
segsel.Clear(sej);
|
||||
|
||||
|
||||
meshtopo.GetVertexSurfaceElements(segpair_p1,pnt1_elems);
|
||||
meshtopo.GetVertexSurfaceElements(segpair_p2,pnt2_elems);
|
||||
for(int k = 1; k <= pnt1_elems.Size(); k++)
|
||||
{
|
||||
Element2d pnt1_sel = mesh.SurfaceElement(pnt1_elems.Elem(k));
|
||||
for(int l = 1; l <= pnt2_elems.Size(); l++)
|
||||
// Only worry about those surfaces which are not in the
|
||||
// boundary layer list
|
||||
if(!surfid.Contains(mesh[sej].si))
|
||||
{
|
||||
Element2d pnt2_sel = mesh.SurfaceElement(pnt2_elems.Elem(l));
|
||||
if((pnt1_sel.GetIndex() == mesh.LineSegment(j).si)
|
||||
&& (pnt2_sel.GetIndex() == mesh.LineSegment(j).si)
|
||||
&& (pnt1_elems.Elem(k) == pnt2_elems.Elem(l)))
|
||||
{
|
||||
pnt_commelem = pnt1_elems.Elem(k);
|
||||
}
|
||||
}
|
||||
}
|
||||
int pnt_commelem = 0;
|
||||
Array<int> pnt1_elems;
|
||||
Array<int> pnt2_elems;
|
||||
|
||||
/*
|
||||
int pnum_commelem = 0;
|
||||
for(int k = 1; k <= mesh.SurfaceElement(pnt_commelem).GetNP(); k++)
|
||||
{
|
||||
if((mesh.SurfaceElement(pnt_commelem).PNum(k) != segpair_p1)
|
||||
&& (mesh.SurfaceElement(pnt_commelem).PNum(k) != segpair_p2))
|
||||
|
||||
meshtopo.GetVertexSurfaceElements(segpair_p1,pnt1_elems);
|
||||
meshtopo.GetVertexSurfaceElements(segpair_p2,pnt2_elems);
|
||||
|
||||
for(int k = 0; k < pnt1_elems.Size(); k++)
|
||||
{
|
||||
const Element2d & pnt1_sel = mesh.SurfaceElement(pnt1_elems[k]);
|
||||
for(int l = 0; l < pnt2_elems.Size(); l++)
|
||||
{
|
||||
const Element2d & pnt2_sel = mesh.SurfaceElement(pnt2_elems[l]);
|
||||
if((pnt1_sel.GetIndex() == mesh[sej].si)
|
||||
&& (pnt2_sel.GetIndex() == mesh[sej].si)
|
||||
&& (pnt1_elems[k] == pnt2_elems[l]))
|
||||
{
|
||||
pnt_commelem = pnt1_elems[k];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
int pnum_commelem = 0;
|
||||
for(int k = 1; k <= mesh.SurfaceElement(pnt_commelem).GetNP(); k++)
|
||||
{
|
||||
if((mesh.SurfaceElement(pnt_commelem).PNum(k) != segpair_p1)
|
||||
&& (mesh.SurfaceElement(pnt_commelem).PNum(k) != segpair_p2))
|
||||
{
|
||||
pnum_commelem = mesh.SurfaceElement(pnt_commelem).PNum(k);
|
||||
}
|
||||
}
|
||||
*/
|
||||
|
||||
Vec3d surfelem_vect, surfelem_vect1;
|
||||
|
||||
const Element2d & commsel = mesh.SurfaceElement(pnt_commelem);
|
||||
|
||||
dbg << "NP= " << commsel.GetNP() << " : ";
|
||||
|
||||
for(int k = 1; k <= commsel.GetNP(); k++)
|
||||
{
|
||||
GetSurfaceNormal(mesh,commsel,k,surfelem_vect1);
|
||||
surfelem_vect += surfelem_vect1;
|
||||
}
|
||||
|
||||
surfelem_vect.Normalize();
|
||||
|
||||
double surfangle = Angle(growthvectors.Elem(segpair_p1),surfelem_vect);
|
||||
|
||||
dbg << "V1= " << surfelem_vect1
|
||||
<< " : V2= " << surfelem_vect1
|
||||
<< " : V= " << surfelem_vect
|
||||
<< " : GV= " << growthvectors.Elem(segpair_p1)
|
||||
<< " : Angle= " << surfangle * 180 / 3.141592;
|
||||
|
||||
|
||||
// remap the segments to the new points
|
||||
mesh[sei][0] = mapto[seg_p1];
|
||||
mesh[sei][1] = mapto[seg_p2];
|
||||
mesh[sej][1] = mapto[seg_p1];
|
||||
mesh[sej][0] = mapto[seg_p2];
|
||||
|
||||
if((surfangle < (90 + angleThreshold) * 3.141592 / 180.0)
|
||||
&& (surfangle > (90 - angleThreshold) * 3.141592 / 180.0))
|
||||
{
|
||||
dbg << " : quad\n";
|
||||
// Since the surface is lower than the threshold, change the effective
|
||||
// prism growth vector to match with the surface vector, so that
|
||||
// the Quad which is created lies on the original surface
|
||||
//growthvectors.Elem(segpair_p1) = surfelem_vect;
|
||||
|
||||
// Add a quad element to account for the prism volume
|
||||
// element which is going to be added
|
||||
Element2d sel(QUAD);
|
||||
sel.PNum(4) = mapto[seg_p1];
|
||||
sel.PNum(3) = mapto[seg_p2];
|
||||
sel.PNum(2) = segpair_p2;
|
||||
sel.PNum(1) = segpair_p1;
|
||||
sel.SetIndex(mesh[sej].si);
|
||||
mesh.AddSurfaceElement(sel);
|
||||
numquads++;
|
||||
}
|
||||
else
|
||||
{
|
||||
dbg << "\n";
|
||||
for (int k = 0; k < pnt1_elems.Size(); k++)
|
||||
{
|
||||
Element2d & pnt_sel = mesh.SurfaceElement(pnt1_elems[k]);
|
||||
if(pnt_sel.GetIndex() == mesh[sej].si)
|
||||
{
|
||||
for(int l = 0; l < pnt_sel.GetNP(); l++)
|
||||
{
|
||||
if(pnt_sel[l] == segpair_p1)
|
||||
pnt_sel[l] = mapto[seg_p1];
|
||||
else if (pnt_sel[l] == segpair_p2)
|
||||
pnt_sel[l] = mapto[seg_p2];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for (int k = 0; k < pnt2_elems.Size(); k++)
|
||||
{
|
||||
Element2d & pnt_sel = mesh.SurfaceElement(pnt2_elems[k]);
|
||||
if(pnt_sel.GetIndex() == mesh[sej].si)
|
||||
{
|
||||
for(int l = 0; l < pnt_sel.GetNP(); l++)
|
||||
{
|
||||
if(pnt_sel[l] == segpair_p1)
|
||||
pnt_sel[l] = mapto.Get(seg_p1);
|
||||
else if (pnt_sel[l] == segpair_p2)
|
||||
pnt_sel[l] = mapto.Get(seg_p2);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
// }
|
||||
}
|
||||
else
|
||||
{
|
||||
pnum_commelem = mesh.SurfaceElement(pnt_commelem).PNum(k);
|
||||
// If the code comes here, it indicates that we are at
|
||||
// a line segment pair which is at the intersection
|
||||
// of two surfaces, both of which have to grow boundary
|
||||
// layers.... here too, remapping the segments to the
|
||||
// new points is required
|
||||
mesh[sei][0] = mapto.Get(seg_p1);
|
||||
mesh[sei][1] = mapto.Get(seg_p2);
|
||||
mesh[sej][1] = mapto.Get(seg_p1);
|
||||
mesh[sej][0] = mapto.Get(seg_p2);
|
||||
}
|
||||
}
|
||||
*/
|
||||
|
||||
Vec3d surfelem_vect, surfelem_vect1;
|
||||
|
||||
Element2d & commsel = mesh.SurfaceElement(pnt_commelem);
|
||||
|
||||
dbg << "NP= " << commsel.GetNP() << " : ";
|
||||
|
||||
for(int k = 1; k <= commsel.GetNP(); k++)
|
||||
{
|
||||
GetSurfaceNormal(mesh,commsel,k,surfelem_vect1);
|
||||
surfelem_vect += surfelem_vect1;
|
||||
}
|
||||
|
||||
surfelem_vect.Normalize();
|
||||
|
||||
double surfangle = Angle(growthvectors.Elem(segpair_p1),surfelem_vect);
|
||||
|
||||
dbg << "V1= " << surfelem_vect1
|
||||
<< " : V2= " << surfelem_vect1
|
||||
<< " : V= " << surfelem_vect
|
||||
<< " : GV= " << growthvectors.Elem(segpair_p1)
|
||||
<< " : Angle= " << surfangle * 180 / 3.141592;
|
||||
|
||||
|
||||
// remap the segments to the new points
|
||||
mesh.LineSegment(i)[0] = mapto.Get(seg_p1);
|
||||
mesh.LineSegment(i)[1] = mapto.Get(seg_p2);
|
||||
mesh.LineSegment(j)[1] = mapto.Get(seg_p1);
|
||||
mesh.LineSegment(j)[0] = mapto.Get(seg_p2);
|
||||
|
||||
if((surfangle < (90 + angleThreshold) * 3.141592 / 180.0)
|
||||
&& (surfangle > (90 - angleThreshold) * 3.141592 / 180.0))
|
||||
{
|
||||
dbg << " : quad\n";
|
||||
// Since the surface is lower than the threshold, change the effective
|
||||
// prism growth vector to match with the surface vector, so that
|
||||
// the Quad which is created lies on the original surface
|
||||
//growthvectors.Elem(segpair_p1) = surfelem_vect;
|
||||
|
||||
// Add a quad element to account for the prism volume
|
||||
// element which is going to be added
|
||||
Element2d sel(QUAD);
|
||||
sel.PNum(4) = mapto.Get(seg_p1);
|
||||
sel.PNum(3) = mapto.Get(seg_p2);
|
||||
sel.PNum(2) = segpair_p2;
|
||||
sel.PNum(1) = segpair_p1;
|
||||
sel.SetIndex(mesh.LineSegment(j).si);
|
||||
mesh.AddSurfaceElement(sel);
|
||||
numquads++;
|
||||
}
|
||||
else
|
||||
{
|
||||
dbg << "\n";
|
||||
for (int k = 1; k <= pnt1_elems.Size(); k++)
|
||||
{
|
||||
Element2d & pnt_sel = mesh.SurfaceElement(pnt1_elems.Elem(k));
|
||||
if(pnt_sel.GetIndex() == mesh.LineSegment(j).si)
|
||||
{
|
||||
for(int l = 1; l <= pnt_sel.GetNP(); l++)
|
||||
{
|
||||
if(pnt_sel.PNum(l) == segpair_p1)
|
||||
{
|
||||
pnt_sel.PNum(l) = mapto.Get(seg_p1);
|
||||
}
|
||||
else if(pnt_sel.PNum(l) == segpair_p2)
|
||||
{
|
||||
pnt_sel.PNum(l) = mapto.Get(seg_p2);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for (int k = 1; k <= pnt2_elems.Size(); k++)
|
||||
{
|
||||
Element2d & pnt_sel = mesh.SurfaceElement(pnt2_elems.Elem(k));
|
||||
if(pnt_sel.GetIndex() == mesh.LineSegment(j).si)
|
||||
{
|
||||
for(int l = 1; l <= pnt_sel.GetNP(); l++)
|
||||
{
|
||||
if(pnt_sel.PNum(l) == segpair_p1)
|
||||
{
|
||||
pnt_sel.PNum(l) = mapto.Get(seg_p1);
|
||||
}
|
||||
else if(pnt_sel.PNum(l) == segpair_p2)
|
||||
{
|
||||
pnt_sel.PNum(l) = mapto.Get(seg_p2);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
// If the code comes here, it indicates that we are at
|
||||
// a line segment pair which is at the intersection
|
||||
// of two surfaces, both of which have to grow boundary
|
||||
// layers.... here too, remapping the segments to the
|
||||
// new points is required
|
||||
mesh.LineSegment(i)[0] = mapto.Get(seg_p1);
|
||||
mesh.LineSegment(i)[1] = mapto.Get(seg_p2);
|
||||
mesh.LineSegment(j)[1] = mapto.Get(seg_p1);
|
||||
mesh.LineSegment(j)[0] = mapto.Get(seg_p2);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Add prismatic cells at the boundaries
|
||||
cout << "Generating prism boundary layer volume elements...." << endl;
|
||||
|
||||
for (i = 1; i <= nse; i++)
|
||||
{
|
||||
Element2d & sel = mesh.SurfaceElement(i);
|
||||
if(surfid.Contains(sel.GetIndex()))
|
||||
{
|
||||
Element el(PRISM);
|
||||
for (j = 1; j <= sel.GetNP(); j++)
|
||||
for (SurfaceElementIndex si = 0; si < nse; si++)
|
||||
{
|
||||
Element2d & sel = mesh.SurfaceElement(si);
|
||||
if(surfid.Contains(sel.GetIndex()))
|
||||
{
|
||||
// Check (Doublecheck) if the corresponding point has a
|
||||
// copy available for remapping
|
||||
if (mapto.Get(sel.PNum(j)))
|
||||
{
|
||||
// Define the points of the newly added Prism cell
|
||||
el.PNum(j+3) = mapto.Get(sel.PNum(j));
|
||||
el.PNum(j) = sel.PNum(j);
|
||||
}
|
||||
}
|
||||
/*
|
||||
Element el(PRISM);
|
||||
for (int j = 0; j < sel.GetNP(); j++)
|
||||
{
|
||||
// Check (Doublecheck) if the corresponding point has a
|
||||
// copy available for remapping
|
||||
if (mapto.Get(sel[j]))
|
||||
{
|
||||
// Define the points of the newly added Prism cell
|
||||
el[j+3] = mapto[sel[j]];
|
||||
el[j] = sel[j];
|
||||
}
|
||||
else
|
||||
{
|
||||
el[j+3] = sel[j];
|
||||
el[j] = sel[j];
|
||||
}
|
||||
}
|
||||
|
||||
el.SetIndex(1);
|
||||
el.Invert();
|
||||
mesh.AddVolumeElement(el);
|
||||
numprisms++;
|
||||
}
|
||||
}
|
||||
el.SetIndex(1);
|
||||
el.Invert();
|
||||
mesh.AddVolumeElement(el);
|
||||
numprisms++;
|
||||
*/
|
||||
cout << "add element: " << endl;
|
||||
int classify = 0;
|
||||
for (int j = 0; j < 3; j++)
|
||||
if (mapto[sel[j]])
|
||||
classify += (1 << j);
|
||||
|
||||
cout << "classify = " << classify << endl;
|
||||
|
||||
ELEMENT_TYPE types[] = { PRISM, TET, TET, PYRAMID,
|
||||
TET, PYRAMID, PYRAMID, PRISM };
|
||||
int nums[] = { sel[0], sel[1], sel[2], mapto[sel[0]], mapto[sel[1]], mapto[sel[2]] };
|
||||
int vertices[][6] =
|
||||
{
|
||||
{ 0, 1, 2, 0, 1, 2 }, // should not occur
|
||||
{ 0, 2, 1, 3, 0, 0 },
|
||||
{ 0, 2, 1, 4, 0, 0 },
|
||||
{ 0, 1, 4, 3, 2, 0 },
|
||||
|
||||
{ 0, 2, 1, 5, 0, 0 },
|
||||
{ 2, 0, 3, 5, 1, 0 },
|
||||
{ 1, 2, 5, 4, 0, 0 },
|
||||
{ 0, 2, 1, 3, 5, 4 }
|
||||
};
|
||||
|
||||
Element el(types[classify]);
|
||||
for (int i = 0; i < 6; i++)
|
||||
el[i] = nums[vertices[classify][i]];
|
||||
el.SetIndex(1);
|
||||
cout << "el = " << el << endl;
|
||||
if (classify != 0)
|
||||
mesh.AddVolumeElement(el);
|
||||
}
|
||||
}
|
||||
|
||||
// Finally switch the point indices of the surface elements
|
||||
// to the newly added ones
|
||||
cout << "Transferring boundary layer surface elements to new vertex references...." << endl;
|
||||
|
||||
for (i = 1; i <= nse; i++)
|
||||
{
|
||||
Element2d & sel = mesh.SurfaceElement(i);
|
||||
if(surfid.Contains(sel.GetIndex()))
|
||||
{
|
||||
for (j = 1; j <= sel.GetNP(); j++)
|
||||
{
|
||||
// Check (Doublecheck) if the corresponding point has a
|
||||
// copy available for remapping
|
||||
if (mapto.Get(sel.PNum(j)))
|
||||
for (int i = 1; i <= nse; i++)
|
||||
{
|
||||
Element2d & sel = mesh.SurfaceElement(i);
|
||||
if(surfid.Contains(sel.GetIndex()))
|
||||
{
|
||||
for (int j = 1; j <= sel.GetNP(); j++)
|
||||
{
|
||||
// Map the surface elements to the new points
|
||||
sel.PNum(j) = mapto.Get(sel.PNum(j));
|
||||
// Check (Doublecheck) if the corresponding point has a
|
||||
// copy available for remapping
|
||||
if (mapto.Get(sel.PNum(j)))
|
||||
{
|
||||
// Map the surface elements to the new points
|
||||
sel.PNum(j) = mapto.Get(sel.PNum(j));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Lock all the prism points so that the rest of the mesh can be
|
||||
// optimised without invalidating the entire mesh
|
||||
for (PointIndex pi = mesh.Points().Begin(); pi < mesh.Points().End(); pi++)
|
||||
{
|
||||
if(bndnodes.Test(i)) mesh.AddLockedPoint(pi);
|
||||
if(bndnodes.Test(pi)) mesh.AddLockedPoint(pi);
|
||||
}
|
||||
|
||||
// Now, actually pull back the old surface points to create
|
||||
// the actual boundary layers
|
||||
cout << "Moving and optimising boundary layer points...." << endl;
|
||||
|
||||
for (i = 1; i <= np; i++)
|
||||
{
|
||||
for (int i = 1; i <= np; i++)
|
||||
{
|
||||
Array<ElementIndex> vertelems;
|
||||
|
||||
if(bndnodes.Test(i))
|
||||
{
|
||||
MeshPoint pointtomove;
|
||||
{
|
||||
MeshPoint pointtomove;
|
||||
|
||||
pointtomove = mesh.Point(i);
|
||||
pointtomove = mesh.Point(i);
|
||||
|
||||
if(layer == prismlayers)
|
||||
{
|
||||
mesh.Point(i).SetPoint(pointtomove + layerht * growthvectors.Elem(i));
|
||||
|
||||
meshtopo.GetVertexElements(i,vertelems);
|
||||
|
||||
for(j = 1; j <= vertelems.Size(); j++)
|
||||
if(layer == prismlayers)
|
||||
{
|
||||
// double sfact = 0.9;
|
||||
Element volel = mesh.VolumeElement(vertelems.Elem(j));
|
||||
if(((volel.GetType() == TET) || (volel.GetType() == TET10)) && (!volel.IsDeleted()))
|
||||
{
|
||||
//while((volel.Volume(mesh.Points()) <= 0.0) && (sfact >= 0.0))
|
||||
//{
|
||||
// mesh.Point(i).SetPoint(pointtomove + (sfact * layerht * growthvectors.Elem(i)));
|
||||
// mesh.ImproveMesh();
|
||||
mesh.Point(i).SetPoint(pointtomove + layerht * growthvectors.Elem(i));
|
||||
|
||||
// // Try to move the point back by one step but
|
||||
// // if the volume drops to below zero, double back
|
||||
// mesh.Point(i).SetPoint(pointtomove + ((sfact + 0.1) * layerht * growthvectors.Elem(i)));
|
||||
// if(volel.Volume(mesh.Points()) <= 0.0)
|
||||
// {
|
||||
// mesh.Point(i).SetPoint(pointtomove + (sfact * layerht * growthvectors.Elem(i)));
|
||||
// }
|
||||
// sfact -= 0.1;
|
||||
//}
|
||||
volel.Delete();
|
||||
}
|
||||
meshtopo.GetVertexElements(i,vertelems);
|
||||
|
||||
for(int j = 1; j <= vertelems.Size(); j++)
|
||||
{
|
||||
// double sfact = 0.9;
|
||||
Element volel = mesh.VolumeElement(vertelems.Elem(j));
|
||||
if(((volel.GetType() == TET) || (volel.GetType() == TET10)) && (!volel.IsDeleted()))
|
||||
{
|
||||
//while((volel.Volume(mesh.Points()) <= 0.0) && (sfact >= 0.0))
|
||||
//{
|
||||
// mesh.Point(i).SetPoint(pointtomove + (sfact * layerht * growthvectors.Elem(i)));
|
||||
// mesh.ImproveMesh();
|
||||
|
||||
// // Try to move the point back by one step but
|
||||
// // if the volume drops to below zero, double back
|
||||
// mesh.Point(i).SetPoint(pointtomove + ((sfact + 0.1) * layerht * growthvectors.Elem(i)));
|
||||
// if(volel.Volume(mesh.Points()) <= 0.0)
|
||||
// {
|
||||
// mesh.Point(i).SetPoint(pointtomove + (sfact * layerht * growthvectors.Elem(i)));
|
||||
// }
|
||||
// sfact -= 0.1;
|
||||
//}
|
||||
volel.Delete();
|
||||
}
|
||||
}
|
||||
|
||||
mesh.Compress();
|
||||
}
|
||||
|
||||
mesh.Compress();
|
||||
}
|
||||
else
|
||||
{
|
||||
mesh.Point(i).SetPoint(pointtomove + layerht * growthvectors.Elem(i));
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
mesh.Point(i).SetPoint(pointtomove + layerht * growthvectors.Elem(i));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Optimise the tet part of the volume mesh after all the modifications
|
||||
|
||||
@ -7,7 +7,18 @@ extern void InsertVirtualBoundaryLayer (Mesh & mesh);
|
||||
|
||||
/// Create a typical prismatic boundary layer on the given
|
||||
/// surfaces
|
||||
extern void GenerateBoundaryLayer (Mesh & mesh, MeshingParameters & mp);
|
||||
|
||||
class BoundaryLayerParameters
|
||||
{
|
||||
public:
|
||||
// parameters by Philippose ..
|
||||
Array<int> surfid;
|
||||
int prismlayers = 1;
|
||||
double hfirst = 0.01;
|
||||
double growthfactor = 1;
|
||||
};
|
||||
|
||||
extern void GenerateBoundaryLayer (Mesh & mesh, BoundaryLayerParameters & blp);
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
@ -133,6 +133,18 @@ void ExportNetgenMeshing()
|
||||
"create empty mesh"
|
||||
)
|
||||
*/
|
||||
.def ("BoundaryLayer", FunctionPointer
|
||||
([](Mesh & self, int bc, double thickness, string material)
|
||||
{
|
||||
BoundaryLayerParameters blp;
|
||||
blp.surfid.Append (bc);
|
||||
blp.prismlayers = 1;
|
||||
blp.hfirst = thickness;
|
||||
blp.growthfactor = 1.0;
|
||||
GenerateBoundaryLayer (self, blp);
|
||||
}
|
||||
))
|
||||
|
||||
;
|
||||
|
||||
|
||||
|
||||
47
ng/ngpkg.cpp
47
ng/ngpkg.cpp
@ -1070,7 +1070,52 @@ namespace netgen
|
||||
return TCL_ERROR;
|
||||
}
|
||||
|
||||
GenerateBoundaryLayer (*mesh, mparam);
|
||||
|
||||
|
||||
|
||||
|
||||
cout << "Generate Prismatic Boundary Layers (Experimental)...." << endl;
|
||||
|
||||
// Use an array to support creation of boundary
|
||||
// layers for multiple surfaces in the future...
|
||||
Array<int> surfid;
|
||||
int surfinp = 0;
|
||||
int prismlayers = 1;
|
||||
double hfirst = 0.01;
|
||||
double growthfactor = 1.0;
|
||||
|
||||
|
||||
while(surfinp >= 0)
|
||||
{
|
||||
cout << "Enter Surface ID (-1 to end list): ";
|
||||
cin >> surfinp;
|
||||
if(surfinp >= 0) surfid.Append(surfinp);
|
||||
}
|
||||
|
||||
cout << "Number of surfaces entered = " << surfid.Size() << endl;
|
||||
cout << "Selected surfaces are:" << endl;
|
||||
|
||||
for(int i = 1; i <= surfid.Size(); i++)
|
||||
cout << "Surface " << i << ": " << surfid.Elem(i) << endl;
|
||||
|
||||
cout << endl << "Enter number of prism layers: ";
|
||||
cin >> prismlayers;
|
||||
if(prismlayers < 1) prismlayers = 1;
|
||||
|
||||
cout << "Enter height of first layer: ";
|
||||
cin >> hfirst;
|
||||
if(hfirst <= 0.0) hfirst = 0.01;
|
||||
|
||||
cout << "Enter layer growth / shrink factor: ";
|
||||
cin >> growthfactor;
|
||||
if(growthfactor <= 0.0) growthfactor = 0.5;
|
||||
|
||||
BoundaryLayerParameters blp;
|
||||
blp.surfid = surfid;
|
||||
blp.prismlayers = prismlayers;
|
||||
blp.hfirst = blp.hfirst;
|
||||
blp.growthfactor = growthfactor;
|
||||
GenerateBoundaryLayer (*mesh, blp);
|
||||
return TCL_OK;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user