Basic isotropic cell relaxation calculated using the incident_facets of a vertex. Not the way to do it, use the incident edges of the vertex to calculate the poly (dual) faces, use their centres and areas for forcing points and weights.

applications/utilities/mesh/generation/CV3DMesher/CV3D.C

@@ -216,7 +216,10 @@ void Foam::CV3D::insertGrid()
 
 void Foam::CV3D::relaxPoints(const scalar relaxation)
 {
-    Info<< "Calculating new points: " << nl << endl;
+    Info<< "Calculating new points: " << endl;
+
+    vector totalDisp = vector::zero;
+    scalar totalDist = 0;
 
     for
     (
@@ -227,10 +230,82 @@ void Foam::CV3D::relaxPoints(const scalar relaxation)
     {
         if (vit->internalPoint())
         {
-            // movePoint(vit, newPoint);
+            std::list<Facet> facets;
+            incident_facets(vit, std::back_inserter(facets));
+
+            label maxIncidentFacets = 20;
+            List<point> vertices(maxIncidentFacets);
+            List<vector> edges(maxIncidentFacets);
+
+            point vd(topoint(vit->point()));
+
+            point vi0 = topoint(dual(facets.begin()->first));
+
+            label edgei = 0;
+
+            for
+            (
+                std::list<Facet>::iterator fit=facets.begin();
+                fit != facets.end();
+                ++fit
+            )
+            {
+                if
+                (
+                    is_infinite(fit->first)
+                 || is_infinite(fit->first->neighbor(fit->second))
+                )
+                {
+                    FatalErrorIn("relaxPoints")
+                        << "Finite cell attached to facet incident on vertex"
+                        << exit(FatalError);
+                }
+
+                point vi1 = topoint(dual(fit->first->neighbor(fit->second)));
+
+                edges[edgei] = vi1 - vi0;
+
+                vertices[edgei] = 0.5*(vi1 + vi0);
+
+                vi0 = vi1;
+
+                edgei++;
+            }
+
+            edgei = 0;
+
+            // Initialise the displacement for the centre and sum-weights
+            vector disp = vector::zero;
+            scalar sumw = 0;
+
+            for
+            (
+                std::list<Facet>::iterator fit=facets.begin();
+                fit != facets.end();
+                ++fit
+            )
+            {
+                vector deltai = vertices[edgei] - vd;
+
+                scalar w = 1;
+
+                disp += w*deltai;
+
+                sumw += w;
+
+                edgei++;
+            }
+
+            disp /= sumw;
+            totalDisp += disp;
+            totalDist += mag(disp);
+
+            movePoint(vit, vd + relaxation*disp);
         }
     }
 
+    Info<< "Total displacement = " << totalDisp
+        << " total distance = " << totalDist << endl;
 }
 
 

applications/utilities/mesh/generation/CV3DMesher/CV3D.H

@@ -79,6 +79,12 @@ public:
     {
     public:
 
+        //- Relaxation factor at the start of the iteration
+        scalar relaxationFactorStart;
+
+        //- Relaxation factor at the end of the iteration
+        scalar relaxationFactorEnd;
+
         //- Minimum cell size below which protusions through the surface are
         //  not split
         scalar minCellSize;
@@ -95,6 +101,19 @@ public:
         //  additional "mitering" lines are added
         scalar maxQuadAngle;
 
+        //- Should the mesh be square-dominated or of unbiased hexagons
+        Switch squares;
+
+        //- Near-wall region where cells are aligned with the wall
+        scalar nearWallAlignedDist;
+
+        //- Square of nearWallAlignedDist
+        scalar nearWallAlignedDist2;
+
+        //- Chose if the cell orientation should relax during the iterations
+        //  or remain fixed to the x-y directions
+        Switch relaxOrientation;
+
         //- Insert near-boundary point mirror or point-pairs
         Switch insertSurfaceNearestPointPairs;
 
@@ -190,6 +209,7 @@ private:
         //  removing and insertin the surface point-pairs
         label startOfBoundaryConformPointPairs_;
 
+
     // Private Member Functions
 
         //- Disallow default bitwise copy construct

applications/utilities/mesh/generation/CV3DMesher/CV3DMesher.C

@@ -90,16 +90,22 @@ int main(int argc, char *argv[])
         mesh.boundaryConform();
     }
 
-    scalar relaxation = 1.0;
+    scalar relaxation =
+    mesh.meshingControls().relaxationFactorStart;
 
-    for (int iter=1; iter<=nIterations; iter++)
+    scalar relaxationDelta =
+    (
+        mesh.meshingControls().relaxationFactorStart
+      - mesh.meshingControls().relaxationFactorEnd
+    )
+    /max(nIterations, 1);
+
+    for (label iter = 0; iter < nIterations; iter++)
     {
         Info<< nl
             << "Relaxation iteration " << iter << nl
             << "~~~~~~~~~~~~~~~~~~~~~~~~" << endl;
 
-        relaxation -= 0.02;
-
         Info<< "relaxation = " << relaxation << endl;
 
         mesh.relaxPoints(relaxation);
@@ -107,6 +113,8 @@ int main(int argc, char *argv[])
         mesh.removeSurfacePointPairs();
         mesh.insertSurfacePointPairs();
         mesh.boundaryConform();
+
+        relaxation -= relaxationDelta;
     }
 
     mesh.write();

applications/utilities/mesh/generation/CV3DMesher/controls.C

@@ -30,10 +30,22 @@ License
 
 Foam::CV3D::controls::controls(const dictionary& controlDict)
 :
+    relaxationFactorStart
+    (
+        readScalar(controlDict.lookup("relaxationFactorStart"))
+    ),
+    relaxationFactorEnd(readScalar(controlDict.lookup("relaxationFactorEnd"))),
     minCellSize(readScalar(controlDict.lookup("minCellSize"))),
     minCellSize2(Foam::sqr(minCellSize)),
     includedAngle(readScalar(controlDict.lookup("includedAngle"))),
     maxQuadAngle(readScalar(controlDict.lookup("maxQuadAngle"))),
+    squares(controlDict.lookup("squares")),
+    nearWallAlignedDist
+    (
+        readScalar(controlDict.lookup("nearWallAlignedDist"))*minCellSize
+    ),
+    nearWallAlignedDist2(Foam::sqr(nearWallAlignedDist)),
+    relaxOrientation(controlDict.lookup("relaxOrientation")),
     insertSurfaceNearestPointPairs
     (
         controlDict.lookup("insertSurfaceNearestPointPairs")

applications/utilities/mesh/generation/CV3DMesher/insertSurfaceNearestPointPairs.C

@@ -442,8 +442,8 @@ void Foam::CV3D::smoothEdge
 
             label nInsertions = label(gap/tols_.maxEdgeSpacing);
 
-            Info<< "Gap at start of edge of "  << gap
+            // Info<< "Gap at start of edge of "  << gap
-                << ". Inserting " << nInsertions << " points" << endl;
+            //     << ". Inserting " << nInsertions << " points" << endl;
 
             scalar spacing = gap / (nInsertions + 1);
 
@@ -473,8 +473,8 @@ void Foam::CV3D::smoothEdge
 
                 label nInsertions = label(gap/tols_.maxEdgeSpacing);
 
-                Info<< "Gap in edge of "  << gap
+                // Info<< "Gap in edge of "  << gap
-                    << ". Inserting " << nInsertions << " points" << endl;
+                //     << ". Inserting " << nInsertions << " points" << endl;
 
                 scalar spacing = gap / (nInsertions + 1);
 
@@ -493,7 +493,7 @@ void Foam::CV3D::smoothEdge
             tempEdgePoints.append(edgePoints[eP]);
         }
 
-        // Special treatment for gaps between closest point to start
+        // Special treatment for gaps between closest point to end
 
         if
         (
@@ -510,8 +510,8 @@ void Foam::CV3D::smoothEdge
 
             label nInsertions = label(gap/tols_.maxEdgeSpacing);
 
-            Info<< "Gap at end of edge of "  << gap
+            // Info<< "Gap at end of edge of "  << gap
-                << ". Inserting " << nInsertions << " points" << endl;
+            //     << ". Inserting " << nInsertions << " points" << endl;
 
             scalar spacing = gap / (nInsertions + 1);
 
@@ -579,7 +579,7 @@ void Foam::CV3D::smoothEdge
                 }
             }
 
-            Info<< edgeI << tab << nPointsRemoved << " points removed." << endl;
+            // Info<< edgeI << tab << nPointsRemoved << " points removed." << endl;
 
             edgePoints.transfer(tempEdgePoints.shrink());
         }