blockMesh: New experimental support for projecting block face point to geometric surfaces

For example, to mesh a sphere with a single block the geometry is defined in the
blockMeshDict as a searchableSurface:

    geometry
    {
        sphere
        {
            type searchableSphere;
            centre (0 0 0);
            radius 1;
        }
    }

The vertices, block topology and curved edges are defined in the usual
way, for example

    v 0.5773502;
    mv -0.5773502;

    a 0.7071067;
    ma -0.7071067;

    vertices
    (
        ($mv $mv $mv)
        ( $v $mv $mv)
        ( $v  $v $mv)
        ($mv  $v $mv)
        ($mv $mv  $v)
        ( $v $mv  $v)
        ( $v  $v  $v)
        ($mv  $v  $v)
    );

    blocks
    (
        hex (0 1 2 3 4 5 6 7) (10 10 10) simpleGrading (1 1 1)
    );

    edges
    (
        arc 0 1 (0 $ma $ma)
        arc 2 3 (0 $a $ma)
        arc 6 7 (0 $a $a)
        arc 4 5 (0 $ma $a)

        arc 0 3 ($ma 0 $ma)
        arc 1 2 ($a 0 $ma)
        arc 5 6 ($a 0 $a)
        arc 4 7 ($ma 0 $a)

        arc 0 4 ($ma $ma 0)
        arc 1 5 ($a $ma 0)
        arc 2 6 ($a $a 0)
        arc 3 7 ($ma $a 0)
    );

which will produce a mesh in which the block edges conform to the sphere
but the faces of the block lie somewhere between the original cube and
the spherical surface which is a consequence of the edge-based
transfinite interpolation.

Now the projection of the block faces to the geometry specified above
can also be specified:

    faces
    (
        project (0 4 7 3) sphere
        project (2 6 5 1) sphere
        project (1 5 4 0) sphere
        project (3 7 6 2) sphere
        project (0 3 2 1) sphere
        project (4 5 6 7) sphere
    );

which produces a mesh that actually conforms to the sphere.

See OpenFOAM-dev/tutorials/mesh/blockMesh/sphere

This functionality is experimental and will undergo further development
and generalization in the future to support more complex surfaces,
feature edge specification and extraction etc.  Please get involved if
you would like to see blockMesh become a more flexible block-structured
mesher.

Henry G. Weller, CFD Direct.

applications/utilities/postProcessing/graphics/PV3Readers/PV3blockMeshReader/vtkPV3blockMesh/vtkPV3blockMesh.C

@@ -75,7 +75,7 @@ void Foam::vtkPV3blockMesh::updateInfoBlocks
     const int nBlocks = blkMesh.size();
     for (int blockI = 0; blockI < nBlocks; ++blockI)
     {
-        const blockDescriptor& blockDef = blkMesh[blockI].blockDef();
+        const blockDescriptor& blockDef = blkMesh[blockI];
 
         word partName = Foam::name(blockI);
 

applications/utilities/postProcessing/graphics/PV3Readers/PV3blockMeshReader/vtkPV3blockMesh/vtkPV3blockMeshConvert.C

@@ -77,7 +77,7 @@ void Foam::vtkPV3blockMesh::convertMeshBlocks
             continue;
         }
 
-        const blockDescriptor& blockDef = blkMesh[blockI].blockDef();
+        const blockDescriptor& blockDef = blkMesh[blockI];
 
         vtkUnstructuredGrid* vtkmesh = vtkUnstructuredGrid::New();
 
@@ -168,7 +168,7 @@ void Foam::vtkPV3blockMesh::convertMeshEdges
         // search each block
         forAll(blkMesh, blockI)
         {
-            const blockDescriptor& blockDef = blkMesh[blockI].blockDef();
+            const blockDescriptor& blockDef = blkMesh[blockI];
 
             edgeList blkEdges = blockDef.blockShape().edges();
 

applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/vtkPVblockMesh/Make/options

@@ -1,5 +1,6 @@
 EXE_INC = \
     -I$(LIB_SRC)/meshTools/lnInclude \
+    -I$(LIB_SRC)/fileFormats/lnInclude \
     -I$(LIB_SRC)/mesh/blockMesh/lnInclude \
     -I$(ParaView_INCLUDE_DIR) \
     -I$(ParaView_INCLUDE_DIR)/vtkkwiml \
@@ -8,6 +9,7 @@ EXE_INC = \
 
 LIB_LIBS = \
     -lmeshTools \
+    -lfileFormats \
     -lblockMesh \
     -L$(FOAM_LIBBIN) -lvtkPVReaders \
     $(GLIBS)

applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/vtkPVblockMesh/vtkPVblockMesh.C

@@ -75,7 +75,7 @@ void Foam::vtkPVblockMesh::updateInfoBlocks
     const int nBlocks = blkMesh.size();
     for (int blockI = 0; blockI < nBlocks; ++blockI)
     {
-        const blockDescriptor& blockDef = blkMesh[blockI].blockDef();
+        const blockDescriptor& blockDef = blkMesh[blockI];
 
         word partName = Foam::name(blockI);
 

applications/utilities/postProcessing/graphics/PVReaders/PVblockMeshReader/vtkPVblockMesh/vtkPVblockMeshConvert.C

@@ -77,7 +77,7 @@ void Foam::vtkPVblockMesh::convertMeshBlocks
             continue;
         }
 
-        const blockDescriptor& blockDef = blkMesh[blockI].blockDef();
+        const blockDescriptor& blockDef = blkMesh[blockI];
 
         vtkUnstructuredGrid* vtkmesh = vtkUnstructuredGrid::New();
 
@@ -168,12 +168,12 @@ void Foam::vtkPVblockMesh::convertMeshEdges
         // search each block
         forAll(blkMesh, blockI)
         {
-            const blockDescriptor& blockDef = blkMesh[blockI].blockDef();
+            const blockDescriptor& blockDef = blkMesh[blockI];
 
             edgeList blkEdges = blockDef.blockShape().edges();
 
             // List of edge point and weighting factors
-            List<point> edgesPoints[12];
+            pointField edgesPoints[12];
             scalarList edgesWeights[12];
             blockDef.edgesPointsWeights(edgesPoints, edgesWeights);