ENH: flange feature edge tutorial:

- slightly bigger display so re-patching does not pick up original outside
- additional refinement at inlet since 2 cells across is too few occasionally
- changed feature angle to pick up more edges

tutorials/mesh/snappyHexMesh/flange/Allrun

@@ -3,5 +3,5 @@
 . $WM_PROJECT_DIR/bin/tools/RunFunctions
 
 runApplication blockMesh
-runApplication surfaceFeatureExtract -includedAngle 135 -writeObj constant/triSurface/flange.stl flange
+runApplication surfaceFeatureExtract -includedAngle 150 -writeObj constant/triSurface/flange.stl flange
 runApplication snappyHexMesh -overwrite

tutorials/mesh/snappyHexMesh/flange/constant/polyMesh/blockMeshDict

@@ -18,14 +18,14 @@ convertToMeters 1;
 
 vertices
 (
-    ( -0.0260093 -0.0275 -0.02375)
-    (  0.0260093 -0.0275 -0.02375)
-    (  0.0260093  0.0225 -0.02375)
-    ( -0.0260093  0.0225 -0.02375)
-    ( -0.0260093 -0.0275 0.00225014)
-    (  0.0260093 -0.0275 0.00225014)
-    (  0.0260093  0.0225 0.00225014)
-    ( -0.0260093  0.0225 0.00225014)
+    ( -0.03 -0.03 -0.03)
+    (  0.03 -0.03 -0.03)
+    (  0.03  0.03 -0.03)
+    ( -0.03  0.03 -0.03)
+    ( -0.03 -0.03 0.01)
+    (  0.03 -0.03 0.01)
+    (  0.03  0.03 0.01)
+    ( -0.03  0.03 0.01)
 );
 
 blocks

tutorials/mesh/snappyHexMesh/flange/system/snappyHexMeshDict

@@ -35,12 +35,23 @@ geometry
         name flange;
     }
 
-    refine
+    //- Refine a bit extra around the small centre hole
+    refineHole
     {
         type searchableSphere;
         centre (0 0 -0.012);
         radius 0.003;
     }
+
+    //- Refine a bit extra around the edge of the flange. With only two cells
+    //  across it might/might not mesh correctly.
+    refineCap
+    {
+        type searchableCylinder;
+        point1 (0 0.021 -0.01075);
+        point2 (0 0.025 -0.01075);
+        radius 0.013;
+    }
 };
 
 
@@ -110,7 +121,7 @@ castellatedMeshControls
         }
     }
 
-    resolveFeatureAngle 45;
+    resolveFeatureAngle 30;
 
 
     // Region-wise refinement
@@ -128,7 +139,12 @@ castellatedMeshControls
 
     refinementRegions
     {
-        refine
+        refineHole
+        {
+            mode inside;
+            levels ((1E15 3));
+        }
+        refineCap
         {
             mode inside;
             levels ((1E15 3));
@@ -221,7 +237,7 @@ addLayersControls
 
     //- When not to extrude surface. 0 is flat surface, 90 is when two faces
     //  make straight angle.
-    featureAngle 45;
+    featureAngle 30;
 
     //- Maximum number of snapping relaxation iterations. Should stop
     //  before upon reaching a correct mesh.