From b8c2c0acf64eea7906357cb140eaaf7746727a6f Mon Sep 17 00:00:00 2001
From: Mattijs Janssens <m.janssens@opencfd.co.uk>
Date: Thu, 16 Jan 2020 12:22:02 +0000
Subject: [PATCH] ENH: shm: support for automatic faceZones

---
 .../conformalVoronoiMeshZones.C               |   33 +-
 .../conformationSurfaces.C                    |   11 +-
 .../generation/snappyHexMesh/snappyHexMesh.C  |   36 +-
 .../meshRefinement/meshRefinement.H           |   21 +-
 .../meshRefinement/meshRefinementBaffles.C    |  230 +-
 .../refinementSurfaces/refinementSurfaces.C   |   55 +-
 .../refinementSurfaces/refinementSurfaces.H   |   17 +-
 .../refinementSurfaces/surfaceZonesInfo.C     |  127 +-
 .../refinementSurfaces/surfaceZonesInfo.H     |   32 +-
 .../snappyHexMeshDriver/snappySnapDriver.C    |  260 +-
 .../snappyHexMeshDriver/snappySnapDriver.H    |    6 +-
 .../snappySnapDriverFeature.C                 |   51 +-
 .../snappyHexMesh/faceZoneRegions/Allclean    |   14 +
 .../mesh/snappyHexMesh/faceZoneRegions/Allrun |   10 +
 .../snappyHexMesh/faceZoneRegions/README.txt  |    2 +
 .../constant/triSurface/box-randomAligned.stl | 1076 +++
 .../constant/triSurface/fixed.obj             | 7532 +++++++++++++++++
 .../constant/triSurface/rotatingZone.obj      | 5948 +++++++++++++
 .../faceZoneRegions/system/blockMeshDict      |   68 +
 .../faceZoneRegions/system/controlDict        |   47 +
 .../faceZoneRegions/system/fvOptions          |  102 +
 .../faceZoneRegions/system/fvSchemes          |   66 +
 .../faceZoneRegions/system/fvSolution         |   58 +
 .../faceZoneRegions/system/meshQualityDict    |   22 +
 .../faceZoneRegions/system/snappyHexMeshDict  |  166 +
 .../system/surfaceFeatureExtractDict          |   27 +
 26 files changed, 15695 insertions(+), 322 deletions(-)
 create mode 100755 tutorials/mesh/snappyHexMesh/faceZoneRegions/Allclean
 create mode 100755 tutorials/mesh/snappyHexMesh/faceZoneRegions/Allrun
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/README.txt
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/constant/triSurface/box-randomAligned.stl
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/constant/triSurface/fixed.obj
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/constant/triSurface/rotatingZone.obj
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/system/blockMeshDict
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/system/controlDict
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvOptions
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvSchemes
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvSolution
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/system/meshQualityDict
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/system/snappyHexMeshDict
 create mode 100644 tutorials/mesh/snappyHexMesh/faceZoneRegions/system/surfaceFeatureExtractDict

diff --git a/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshZones.C b/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshZones.C
index 41e6d0e34a..8fae48033c 100644
--- a/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshZones.C
+++ b/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshZones.C
@@ -585,35 +585,52 @@ void Foam::conformalVoronoiMesh::addZones
 
     labelList namedSurfaces(surfaceZonesInfo::getNamedSurfaces(surfZones));
 
+    // Tbd. No support yet for multi-faceZones on outside of cellZone
+
     forAll(namedSurfaces, i)
     {
         label surfI = namedSurfaces[i];
+        const wordList& fzNames = surfZones[surfI].faceZoneNames();
 
         Info<< incrIndent << indent << "Surface : "
             << geometryToConformTo().geometry().names()[surfI] << nl
             << indent << "    faceZone : "
-            << surfZones[surfI].faceZoneName() << nl
+            << (fzNames.size() ? fzNames[0] : "") << nl
             << indent << "    cellZone : "
             << surfZones[surfI].cellZoneName()
             << decrIndent << endl;
     }
 
     // Add zones to mesh
-    labelList surfaceToFaceZone =
-        surfaceZonesInfo::addFaceZonesToMesh
+    labelList surfaceToFaceZone(surfZones.size(), -1);
+    {
+        const labelListList surfaceToFaceZones
         (
-            surfZones,
-            namedSurfaces,
-            mesh
+            surfaceZonesInfo::addFaceZonesToMesh
+            (
+                surfZones,
+                namedSurfaces,
+                mesh
+            )
         );
+        forAll(surfaceToFaceZones, surfi)
+        {
+            if (surfaceToFaceZones[surfi].size())
+            {
+                surfaceToFaceZone[surfi] = surfaceToFaceZones[surfi][0];
+            }
+        }
+    }
 
-    labelList surfaceToCellZone =
+    const labelList surfaceToCellZone
+    (
         surfaceZonesInfo::addCellZonesToMesh
         (
             surfZones,
             namedSurfaces,
             mesh
-        );
+        )
+    );
 
     // Topochange container
     polyTopoChange meshMod(mesh);
diff --git a/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformationSurfaces/conformationSurfaces.C b/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformationSurfaces/conformationSurfaces.C
index 6dc341e4a8..600ee89ca9 100644
--- a/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformationSurfaces/conformationSurfaces.C
+++ b/applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformationSurfaces/conformationSurfaces.C
@@ -355,7 +355,16 @@ Foam::conformationSurfaces::conformationSurfaces
             // Surface zones
             if (dict.found("faceZone"))
             {
-                surfZones_.set(surfI, new surfaceZonesInfo(surface, dict));
+                surfZones_.set
+                (
+                    surfI,
+                    new surfaceZonesInfo
+                    (
+                        surface,
+                        dict,
+                        allGeometry_.regionNames()[surfaces_[surfI]]
+                    )
+                );
             }
 
             allGeometryToSurfaces_[surfaces_[surfI]] = surfI;
diff --git a/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMesh.C b/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMesh.C
index ab3f946896..3998d13538 100644
--- a/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMesh.C
+++ b/applications/utilities/mesh/generation/snappyHexMesh/snappyHexMesh.C
@@ -163,7 +163,16 @@ autoPtr<refinementSurfaces> createRefinementSurfaces
             globalLevelIncr[surfi] = gapLevelIncrement;
 
             // Surface zones
-            surfZones.set(surfi, new surfaceZonesInfo(surface, shapeDict));
+            surfZones.set
+            (
+                surfi,
+                new surfaceZonesInfo
+                (
+                    surface,
+                    shapeDict,
+                    allGeometry.regionNames()[surfaces[surfi]]
+                )
+            );
 
 
             // Global perpendicular angle
@@ -1395,9 +1404,10 @@ int main(int argc, char *argv[])
                 Info<< surfaces.names()[surfi] << ':' << nl << nl;
             }
 
-            const word& fzName = surfaces.surfZones()[surfi].faceZoneName();
+            const wordList& fzNames =
+                surfaces.surfZones()[surfi].faceZoneNames();
 
-            if (fzName.empty())
+            if (fzNames.empty())
             {
                 // 'Normal' surface
                 forAll(regNames, i)
@@ -1520,15 +1530,19 @@ int main(int argc, char *argv[])
                 // region in surface for patch for zoning
                 if (regNames.size())
                 {
-                    label globalRegioni = surfaces.globalRegion(surfi, 0);
+                    forAll(fzNames, fzi)
+                    {
+                        const word& fzName = fzNames[fzi];
+                        label globalRegioni = surfaces.globalRegion(surfi, fzi);
 
-                    meshRefiner.addFaceZone
-                    (
-                        fzName,
-                        pbm[globalToMasterPatch[globalRegioni]].name(),
-                        pbm[globalToSlavePatch[globalRegioni]].name(),
-                        surfaces.surfZones()[surfi].faceType()
-                    );
+                        meshRefiner.addFaceZone
+                        (
+                            fzName,
+                            pbm[globalToMasterPatch[globalRegioni]].name(),
+                            pbm[globalToSlavePatch[globalRegioni]].name(),
+                            surfaces.surfZones()[surfi].faceType()
+                        );
+                    }
                 }
             }
 
diff --git a/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.H b/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.H
index 3a43723a5e..7bbdcf96a3 100644
--- a/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.H
+++ b/src/mesh/snappyHexMesh/meshRefinement/meshRefinement.H
@@ -597,14 +597,15 @@ private:
             ) const;
 
             //- Calculate intersections on zoned faces. Return per face -1
-            // or the index of the surface and the orientation w.r.t. surface
+            //  or the global region of the surface and the orientation
+            //  w.r.t. surface
             void getIntersections
             (
                 const labelList& surfacesToTest,
                 const pointField& neiCc,
                 const labelList& testFaces,
 
-                labelList& namedSurfaceIndex,
+                labelList& namedSurfaceRegion,
                 bitSet& posOrientation
             ) const;
 
@@ -737,13 +738,13 @@ private:
 
             //- Finds zone per cell for cells inside closed named surfaces.
             //  (uses geometric test for insideness)
-            //  Adapts namedSurfaceIndex so all faces on boundary of cellZone
+            //  Adapts namedSurfaceRegion so all faces on boundary of cellZone
             //  have corresponding faceZone.
             void findCellZoneGeometric
             (
                 const pointField& neiCc,
                 const labelList& closedNamedSurfaces,
-                labelList& namedSurfaceIndex,
+                labelList& namedSurfaceRegion,
                 const labelList& surfaceToCellZone,
                 labelList& cellToZone
             ) const;
@@ -781,14 +782,14 @@ private:
 
             //- Finds zone per cell. Uses topological walk with all faces
             //  marked in unnamedSurfaceRegion (intersections with unnamed
-            //  surfaces) and namedSurfaceIndex (intersections with named
+            //  surfaces) and namedSurfaceRegion (intersections with named
             //  surfaces) regarded as blocked.
             void findCellZoneTopo
             (
                 const label backgroundZoneID,
                 const pointField& locationsInMesh,
                 const labelList& unnamedSurfaceRegion,
-                const labelList& namedSurfaceIndex,
+                const labelList& namedSurfaceRegion,
                 const labelList& surfaceToCellZone,
                 labelList& cellToZone
             ) const;
@@ -800,17 +801,17 @@ private:
                 const label nErodeCellZones,
                 const label backgroundZoneID,
                 const labelList& unnamedSurfaceRegion,
-                const labelList& namedSurfaceIndex,
+                const labelList& namedSurfaceRegion,
                 labelList& cellToZone
             ) const;
 
-            //- Make namedSurfaceIndex consistent with cellToZone
+            //- Make namedSurfaceRegion consistent with cellToZone
             //  - clear out any blocked faces inbetween same cell zone.
             void makeConsistentFaceIndex
             (
                 const labelList& zoneToNamedSurface,
                 const labelList& cellToZone,
-                labelList& namedSurfaceIndex
+                labelList& namedSurfaceRegion
             ) const;
 
             //- Calculate cellZone allocation
@@ -825,7 +826,7 @@ private:
                 labelList& cellToZone,
                 labelList& unnamedRegion1,
                 labelList& unnamedRegion2,
-                labelList& namedSurfaceIndex,
+                labelList& namedSurfaceRegion,
                 bitSet& posOrientation
             ) const;
 
diff --git a/src/mesh/snappyHexMesh/meshRefinement/meshRefinementBaffles.C b/src/mesh/snappyHexMesh/meshRefinement/meshRefinementBaffles.C
index ae7831eb49..fb15e77059 100644
--- a/src/mesh/snappyHexMesh/meshRefinement/meshRefinementBaffles.C
+++ b/src/mesh/snappyHexMesh/meshRefinement/meshRefinementBaffles.C
@@ -307,7 +307,7 @@ void Foam::meshRefinement::getBafflePatches
     labelList cellToZone;
     labelList unnamedRegion1;
     labelList unnamedRegion2;
-    labelList namedSurfaceIndex;
+    labelList namedSurfaceRegion;
     {
         bitSet posOrientation;
         zonify
@@ -321,7 +321,7 @@ void Foam::meshRefinement::getBafflePatches
             cellToZone,
             unnamedRegion1,
             unnamedRegion2,
-            namedSurfaceIndex,
+            namedSurfaceRegion,
             posOrientation
         );
     }
@@ -381,8 +381,8 @@ void Foam::meshRefinement::getBafflePatches
                  || (neiZone >= 0 && ownZone != -2)
                 )
              && (
-                    namedSurfaceIndex.size() == 0
-                 || namedSurfaceIndex[faceI] == -1
+                    namedSurfaceRegion.size() == 0
+                 || namedSurfaceRegion[faceI] == -1
                 )
             )
             {
@@ -426,17 +426,17 @@ Foam::Map<Foam::labelPair> Foam::meshRefinement::getZoneBafflePatches
 
     forAll(surfZones, surfI)
     {
-        const word& faceZoneName = surfZones[surfI].faceZoneName();
+        const wordList& faceZoneNames = surfZones[surfI].faceZoneNames();
 
-        if (faceZoneName.size())
+        forAll(faceZoneNames, fzi)
         {
             // Get zone
+            const word& faceZoneName = faceZoneNames[fzi];
             label zoneI = fZones.findZoneID(faceZoneName);
-
             const faceZone& fZone = fZones[zoneI];
 
             // Get patch allocated for zone
-            label globalRegionI = surfaces_.globalRegion(surfI, 0);
+            label globalRegionI = surfaces_.globalRegion(surfI, fzi);
             labelPair zPatches
             (
                 globalToMasterPatch[globalRegionI],
@@ -1370,7 +1370,7 @@ void Foam::meshRefinement::findCellZoneGeometric
 (
     const pointField& neiCc,
     const labelList& closedNamedSurfaces,   // indices of closed surfaces
-    labelList& namedSurfaceIndex,           // per face index of named surface
+    labelList& namedSurfaceRegion,          // per face: named surface region
     const labelList& surfaceToCellZone,     // cell zone index per surface
 
     labelList& cellToZone
@@ -1418,11 +1418,9 @@ void Foam::meshRefinement::findCellZoneGeometric
 
     // Count points to test.
     label nCandidates = 0;
-    forAll(namedSurfaceIndex, faceI)
+    forAll(namedSurfaceRegion, faceI)
     {
-        label surfI = namedSurfaceIndex[faceI];
-
-        if (surfI != -1)
+        if (namedSurfaceRegion[faceI] != -1)
         {
             if (mesh_.isInternalFace(faceI))
             {
@@ -1438,11 +1436,9 @@ void Foam::meshRefinement::findCellZoneGeometric
     // Collect points.
     pointField candidatePoints(nCandidates);
     nCandidates = 0;
-    forAll(namedSurfaceIndex, faceI)
+    forAll(namedSurfaceRegion, faceI)
     {
-        label surfI = namedSurfaceIndex[faceI];
-
-        if (surfI != -1)
+        if (namedSurfaceRegion[faceI] != -1)
         {
             label own = faceOwner[faceI];
             const point& ownCc = cellCentres[own];
@@ -1482,11 +1478,9 @@ void Foam::meshRefinement::findCellZoneGeometric
     // 3. Update zone information
 
     nCandidates = 0;
-    forAll(namedSurfaceIndex, faceI)
+    forAll(namedSurfaceRegion, faceI)
     {
-        label surfI = namedSurfaceIndex[faceI];
-
-        if (surfI != -1)
+        if (namedSurfaceRegion[faceI] != -1)
         {
             label own = faceOwner[faceI];
 
@@ -1518,8 +1512,8 @@ void Foam::meshRefinement::findCellZoneGeometric
     }
 
 
-    // Adapt the namedSurfaceIndex
-    // ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+    // Adapt the namedSurfaceRegion
+    // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     // for if any cells were not completely covered.
 
     for (label faceI = 0; faceI < mesh_.nInternalFaces(); faceI++)
@@ -1527,7 +1521,7 @@ void Foam::meshRefinement::findCellZoneGeometric
         label ownZone = cellToZone[mesh_.faceOwner()[faceI]];
         label neiZone = cellToZone[mesh_.faceNeighbour()[faceI]];
 
-        if (namedSurfaceIndex[faceI] == -1 && (ownZone != neiZone))
+        if (namedSurfaceRegion[faceI] == -1 && (ownZone != neiZone))
         {
             // Give face the zone of min cell zone (but only if the
             // cellZone originated from a closed, named surface)
@@ -1546,12 +1540,14 @@ void Foam::meshRefinement::findCellZoneGeometric
                 minZone = min(ownZone, neiZone);
             }
 
-            // Make sure the cellZone originated from a closed surface
+            // Make sure the cellZone originated from a closed surface. Use
+            // hardcoded region 0 inside named surface.
             label geomSurfI = surfaceToCellZone.find(minZone);
 
             if (geomSurfI != -1)
             {
-                namedSurfaceIndex[faceI] = geomSurfI;
+                namedSurfaceRegion[faceI] =
+                    surfaces_.globalRegion(geomSurfI, 0);
             }
         }
     }
@@ -1573,7 +1569,7 @@ void Foam::meshRefinement::findCellZoneGeometric
                 label ownZone = cellToZone[mesh_.faceOwner()[faceI]];
                 label neiZone = neiCellZone[faceI-mesh_.nInternalFaces()];
 
-                if (namedSurfaceIndex[faceI] == -1 && (ownZone != neiZone))
+                if (namedSurfaceRegion[faceI] == -1 && (ownZone != neiZone))
                 {
                     // Give face the min cell zone
                     label minZone;
@@ -1590,12 +1586,14 @@ void Foam::meshRefinement::findCellZoneGeometric
                         minZone = min(ownZone, neiZone);
                     }
 
-                    // Make sure the cellZone originated from a closed surface
+                    // Make sure the cellZone originated from a closed surface.
+                    // Use hardcoded region 0 inside named surface.
                     label geomSurfI = surfaceToCellZone.find(minZone);
 
                     if (geomSurfI != -1)
                     {
-                        namedSurfaceIndex[faceI] = geomSurfI;
+                        namedSurfaceRegion[faceI] =
+                            surfaces_.globalRegion(geomSurfI, 0);
                     }
                 }
             }
@@ -1603,7 +1601,7 @@ void Foam::meshRefinement::findCellZoneGeometric
     }
 
     // Sync
-    syncTools::syncFaceList(mesh_, namedSurfaceIndex, maxEqOp<label>());
+    syncTools::syncFaceList(mesh_, namedSurfaceRegion, maxEqOp<label>());
 }
 
 
@@ -1839,7 +1837,7 @@ void Foam::meshRefinement::findCellZoneTopo
     const label backgroundZoneID,
     const pointField& locationsInMesh,
     const labelList& unnamedSurfaceRegion,
-    const labelList& namedSurfaceIndex,
+    const labelList& namedSurfaceRegion,
     const labelList& surfaceToCellZone,
     labelList& cellToZone
 ) const
@@ -1848,7 +1846,7 @@ void Foam::meshRefinement::findCellZoneTopo
     // (after all off the unreachable bits of the mesh have been removed).
     // This routine splits the mesh into regions, based on the intersection
     // with a surface. The problem is that we know the surface which
-    // (intersected) face belongs to (in namedSurfaceIndex) but we don't
+    // (intersected) face belongs to (in namedSurfaceRegion) but we don't
     // know which side of the face it relates to. So all we are doing here
     // is get the correspondence between surface/cellZone and regionSplit
     // region. See the logic in calcRegionToZone.
@@ -1862,14 +1860,18 @@ void Foam::meshRefinement::findCellZoneTopo
     // Assumes:
     // - region containing keepPoint does not go into a cellZone
     // - all other regions can be found by crossing faces marked in
-    //   namedSurfaceIndex.
+    //   namedSurfaceRegion.
 
     // Analyse regions. Reuse regionsplit
     boolList blockedFace(mesh_.nFaces());
 
     forAll(unnamedSurfaceRegion, faceI)
     {
-        if (unnamedSurfaceRegion[faceI] == -1 && namedSurfaceIndex[faceI] == -1)
+        if
+        (
+            unnamedSurfaceRegion[faceI] == -1
+         && namedSurfaceRegion[faceI] == -1
+        )
         {
             blockedFace[faceI] = false;
         }
@@ -1878,7 +1880,7 @@ void Foam::meshRefinement::findCellZoneTopo
             blockedFace[faceI] = true;
         }
     }
-    // No need to sync since namedSurfaceIndex already is synced
+    // No need to sync since namedSurfaceRegion already is synced
 
     // Set region per cell based on walking
     regionSplit cellRegion(mesh_, blockedFace);
@@ -1968,13 +1970,16 @@ void Foam::meshRefinement::findCellZoneTopo
 
         for (label faceI = 0; faceI < mesh_.nInternalFaces(); faceI++)
         {
-            label surfI = namedSurfaceIndex[faceI];
+            label regionI = namedSurfaceRegion[faceI];
 
             // Connected even if no cellZone defined for surface
-            if (unnamedSurfaceRegion[faceI] == -1 && surfI != -1)
+            if (unnamedSurfaceRegion[faceI] == -1 && regionI != -1)
             {
                 // Calculate region to zone from cellRegions on either side
                 // of internal face.
+
+                label surfI = surfaces_.whichSurface(regionI).first();
+
                 bool changedCell = calcRegionToZone
                 (
                     backgroundZoneID,
@@ -2008,11 +2013,13 @@ void Foam::meshRefinement::findCellZoneTopo
                 {
                     label faceI = pp.start()+i;
 
-                    label surfI = namedSurfaceIndex[faceI];
+                    label regionI = namedSurfaceRegion[faceI];
 
                     // Connected even if no cellZone defined for surface
-                    if (unnamedSurfaceRegion[faceI] == -1 && surfI != -1)
+                    if (unnamedSurfaceRegion[faceI] == -1 && regionI != -1)
                     {
+                        label surfI = surfaces_.whichSurface(regionI).first();
+
                         bool changedCell = calcRegionToZone
                         (
                             backgroundZoneID,
@@ -2070,7 +2077,7 @@ void Foam::meshRefinement::erodeCellZone
     const label nErodeCellZones,
     const label backgroundZoneID,
     const labelList& unnamedSurfaceRegion,
-    const labelList& namedSurfaceIndex,
+    const labelList& namedSurfaceRegion,
     labelList& cellToZone
 ) const
 {
@@ -2097,7 +2104,7 @@ void Foam::meshRefinement::erodeCellZone
             if
             (
                 unnamedSurfaceRegion[facei] == -1
-             && namedSurfaceIndex[facei] == -1
+             && namedSurfaceRegion[facei] == -1
             )
             {
                 label own = mesh_.faceOwner()[facei];
@@ -2137,7 +2144,7 @@ void Foam::meshRefinement::erodeCellZone
                     if
                     (
                         unnamedSurfaceRegion[facei] == -1
-                     && namedSurfaceIndex[facei] == -1
+                     && namedSurfaceRegion[facei] == -1
                     )
                     {
                         label own = mesh_.faceOwner()[facei];
@@ -2174,14 +2181,14 @@ void Foam::meshRefinement::makeConsistentFaceIndex
 (
     const labelList& surfaceMap,
     const labelList& cellToZone,
-    labelList& namedSurfaceIndex
+    labelList& namedSurfaceRegion
 ) const
 {
-    // Make namedSurfaceIndex consistent with cellToZone - clear out any
+    // Make namedSurfaceRegion consistent with cellToZone - clear out any
     // blocked faces inbetween same cell zone (or background (=-1))
     // Do not do this for surfaces relating to 'pure' faceZones i.e.
     // faceZones without a cellZone. Note that we cannot check here
-    // for different cellZones on either side but no namedSurfaceIndex
+    // for different cellZones on either side but no namedSurfaceRegion
     // since cellZones can now originate from locationsInMesh as well
     // (instead of only through named surfaces)
 
@@ -2192,15 +2199,16 @@ void Foam::meshRefinement::makeConsistentFaceIndex
     {
         label ownZone = cellToZone[faceOwner[faceI]];
         label neiZone = cellToZone[faceNeighbour[faceI]];
+        label globalI = namedSurfaceRegion[faceI];
 
         if
         (
             ownZone == neiZone
-         && namedSurfaceIndex[faceI] != -1
-         && surfaceMap[namedSurfaceIndex[faceI]] == -1
+         && globalI != -1
+         && surfaceMap[surfaces_.whichSurface(globalI).first()] == -1
         )
         {
-            namedSurfaceIndex[faceI] = -1;
+            namedSurfaceRegion[faceI] = -1;
         }
     }
 
@@ -2223,15 +2231,16 @@ void Foam::meshRefinement::makeConsistentFaceIndex
 
                 label ownZone = cellToZone[faceOwner[faceI]];
                 label neiZone = neiCellZone[faceI-mesh_.nInternalFaces()];
+                label globalI = namedSurfaceRegion[faceI];
 
                 if
                 (
                     ownZone == neiZone
-                 && namedSurfaceIndex[faceI] != -1
-                 && surfaceMap[namedSurfaceIndex[faceI]] == -1
+                 && globalI != -1
+                 && surfaceMap[surfaces_.whichSurface(globalI).first()] == -1
                 )
                 {
-                    namedSurfaceIndex[faceI] = -1;
+                    namedSurfaceRegion[faceI] = -1;
                 }
             }
         }
@@ -2241,14 +2250,15 @@ void Foam::meshRefinement::makeConsistentFaceIndex
             forAll(pp, i)
             {
                 label faceI = pp.start()+i;
+                label globalI = namedSurfaceRegion[faceI];
 
                 if
                 (
-                    namedSurfaceIndex[faceI] != -1
-                 && surfaceMap[namedSurfaceIndex[faceI]] == -1
+                    globalI != -1
+                 && surfaceMap[surfaces_.whichSurface(globalI).first()] == -1
                 )
                 {
-                    namedSurfaceIndex[faceI] = -1;
+                    namedSurfaceRegion[faceI] = -1;
                 }
             }
         }
@@ -2262,12 +2272,12 @@ void Foam::meshRefinement::getIntersections
     const pointField& neiCc,
     const labelList& testFaces,
 
-    labelList& namedSurfaceIndex,
+    labelList& namedSurfaceRegion,
     bitSet& posOrientation
 ) const
 {
-    namedSurfaceIndex.setSize(mesh_.nFaces());
-    namedSurfaceIndex = -1;
+    namedSurfaceRegion.setSize(mesh_.nFaces());
+    namedSurfaceRegion = -1;
 
     posOrientation.setSize(mesh_.nFaces());
     posOrientation = false;
@@ -2300,31 +2310,30 @@ void Foam::meshRefinement::getIntersections
     // the information already in surfaceIndex_.
 
     labelList surface1;
+    labelList region1;
     List<pointIndexHit> hit1;
     vectorField normal1;
     labelList surface2;
+    labelList region2;
     List<pointIndexHit> hit2;
     vectorField normal2;
-    {
-        labelList region1;
-        labelList region2;
-        surfaces_.findNearestIntersection
-        (
-            surfacesToTest,
-            start,
-            end,
 
-            surface1,
-            hit1,
-            region1,
-            normal1,
+    surfaces_.findNearestIntersection
+    (
+        surfacesToTest,
+        start,
+        end,
 
-            surface2,
-            hit2,
-            region2,
-            normal2
-        );
-    }
+        surface1,
+        hit1,
+        region1,
+        normal1,
+
+        surface2,
+        hit2,
+        region2,
+        normal2
+    );
 
     forAll(testFaces, i)
     {
@@ -2343,20 +2352,32 @@ void Foam::meshRefinement::getIntersections
                 )
             )
             {
-                namedSurfaceIndex[faceI] = surface2[i];
+                namedSurfaceRegion[faceI] = surfaces_.globalRegion
+                (
+                    surface2[i],
+                    region2[i]
+                );
                 posOrientation.set(faceI, ((area&normal2[i]) > 0));
                 nSurfFaces[surface2[i]]++;
             }
             else
             {
-                namedSurfaceIndex[faceI] = surface1[i];
+                namedSurfaceRegion[faceI] = surfaces_.globalRegion
+                (
+                    surface1[i],
+                    region1[i]
+                );
                 posOrientation.set(faceI, ((area&normal1[i]) > 0));
                 nSurfFaces[surface1[i]]++;
             }
         }
         else if (surface2[i] != -1)
         {
-            namedSurfaceIndex[faceI] = surface2[i];
+            namedSurfaceRegion[faceI] = surfaces_.globalRegion
+            (
+                surface2[i],
+                region2[i]
+            );
             posOrientation.set(faceI, ((area&normal2[i]) > 0));
             nSurfFaces[surface2[i]]++;
         }
@@ -2370,7 +2391,7 @@ void Foam::meshRefinement::getIntersections
     syncTools::syncFaceList
     (
         mesh_,
-        namedSurfaceIndex,
+        namedSurfaceRegion,
         maxEqOp<label>()
     );
 
@@ -2399,7 +2420,7 @@ void Foam::meshRefinement::zonify
     labelList& cellToZone,
     labelList& unnamedRegion1,
     labelList& unnamedRegion2,
-    labelList& namedSurfaceIndex,
+    labelList& namedSurfaceRegion,
     bitSet& posOrientation
 ) const
 {
@@ -2408,9 +2429,9 @@ void Foam::meshRefinement::zonify
     // -2  : unset
     // -1  : not in any zone (zone 'none' or background zone)
     // >=0 : zoneID
-    // namedSurfaceIndex, posOrientation:
+    // namedSurfaceRegion, posOrientation:
     // -1  : face not intersected by named surface
-    // >=0 : index of named surface
+    // >=0 : globalRegion (surface+region)
     //       (and posOrientation: surface normal v.s. face normal)
 
     const PtrList<surfaceZonesInfo>& surfZones = surfaces_.surfZones();
@@ -2441,7 +2462,7 @@ void Foam::meshRefinement::zonify
     cellToZone.setSize(mesh_.nCells());
     cellToZone = -2;
 
-    namedSurfaceIndex.clear();
+    namedSurfaceRegion.clear();
     posOrientation.clear();
 
 
@@ -2466,7 +2487,7 @@ void Foam::meshRefinement::zonify
             namedSurfaces,
             neiCc,
             intersectedFaces(),
-            namedSurfaceIndex,
+            namedSurfaceRegion,
             posOrientation
         );
     }
@@ -2551,12 +2572,12 @@ void Foam::meshRefinement::zonify
 
         // Stop at unnamed or named surface
         labelList allRegion1(mesh_.nFaces(), -1);
-        forAll(namedSurfaceIndex, faceI)
+        forAll(namedSurfaceRegion, faceI)
         {
             allRegion1[faceI] = max
             (
                 unnamedRegion1[faceI],
-                namedSurfaceIndex[faceI]
+                namedSurfaceRegion[faceI]
             );
         }
 
@@ -2595,7 +2616,7 @@ void Foam::meshRefinement::zonify
         (
             neiCc,
             closedNamedSurfaces,    // indices of closed surfaces
-            namedSurfaceIndex,      // per face index of named surface
+            namedSurfaceRegion,     // per face index of named surface + region
             surfaceToCellZone,      // cell zone index per surface
 
             cellToZone
@@ -2618,7 +2639,7 @@ void Foam::meshRefinement::zonify
                 backgroundZoneID,
                 pointField(0),
                 unnamedRegion1,      // Intersections with unnamed surfaces
-                namedSurfaceIndex,   // Intersections with named surfaces
+                namedSurfaceRegion,  // Intersections with named surfaces
                 surfaceToCellZone,
                 cellToZone
             );
@@ -2635,13 +2656,13 @@ void Foam::meshRefinement::zonify
                 nErodeCellZones,
                 backgroundZoneID,
                 unnamedRegion1,
-                namedSurfaceIndex,
+                namedSurfaceRegion,
                 cellToZone
             );
         }
 
 
-        // Make sure namedSurfaceIndex is unset inbetween same cell zones.
+        // Make sure namedSurfaceRegion is unset inbetween same cell zones.
         if (!allowFreeStandingZoneFaces)
         {
             Info<< "Only keeping zone faces inbetween different cellZones."
@@ -2668,7 +2689,7 @@ void Foam::meshRefinement::zonify
             (
                 surfaceMap,
                 cellToZone,
-                namedSurfaceIndex
+                namedSurfaceRegion
             );
         }
     }
@@ -4476,7 +4497,7 @@ Foam::autoPtr<Foam::mapPolyMesh> Foam::meshRefinement::zonify
     // Add any faceZones, cellZones originating from surface to the mesh
     // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     labelList surfaceToCellZone;
-    labelList surfaceToFaceZone;
+    labelListList surfaceToFaceZones;
 
     labelList namedSurfaces(surfaceZonesInfo::getNamedSurfaces(surfZones));
     if (namedSurfaces.size())
@@ -4487,8 +4508,9 @@ Foam::autoPtr<Foam::mapPolyMesh> Foam::meshRefinement::zonify
             label surfI = namedSurfaces[i];
 
             Info<< "Surface : " << surfaces_.names()[surfI] << nl
-                << "    faceZone : " << surfZones[surfI].faceZoneName() << nl
-                << "    cellZone : " << surfZones[surfI].cellZoneName() << endl;
+                << "    faceZones : " << surfZones[surfI].faceZoneNames() << nl
+                << "    cellZone  : " << surfZones[surfI].cellZoneName()
+                << endl;
         }
         Info<< endl;
 
@@ -4499,7 +4521,7 @@ Foam::autoPtr<Foam::mapPolyMesh> Foam::meshRefinement::zonify
             namedSurfaces,
             mesh_
         );
-        surfaceToFaceZone = surfaceZonesInfo::addFaceZonesToMesh
+        surfaceToFaceZones = surfaceZonesInfo::addFaceZonesToMesh
         (
             surfZones,
             namedSurfaces,
@@ -4516,11 +4538,11 @@ Foam::autoPtr<Foam::mapPolyMesh> Foam::meshRefinement::zonify
     // -2 : unset : not allowed!
     // -1 : not in any zone (zone 'none')
     // >=0: zoneID
-    // namedSurfaceIndex:
+    // namedSurfaceRegion:
     // -1  : face not intersecting a named surface
     // >=0 : index of named surface
     labelList cellToZone;
-    labelList namedSurfaceIndex;
+    labelList namedSurfaceRegion;
     bitSet posOrientation;
     {
         labelList unnamedRegion1;
@@ -4537,24 +4559,26 @@ Foam::autoPtr<Foam::mapPolyMesh> Foam::meshRefinement::zonify
             cellToZone,
             unnamedRegion1,
             unnamedRegion2,
-            namedSurfaceIndex,
+            namedSurfaceRegion,
             posOrientation
         );
     }
 
 
-    // Convert namedSurfaceIndex (index of named surfaces) to
+    // Convert namedSurfaceRegion (index of named surfaces) to
     // actual faceZone index
 
     //- Per face index of faceZone or -1
     labelList faceToZone(mesh_.nFaces(), -1);
 
-    forAll(namedSurfaceIndex, faceI)
+    forAll(namedSurfaceRegion, faceI)
     {
-        label surfI = namedSurfaceIndex[faceI];
-        if (surfI != -1)
+        //label surfI = namedSurfaceIndex[faceI];
+        label globalI = namedSurfaceRegion[faceI];
+        if (globalI != -1)
         {
-            faceToZone[faceI] = surfaceToFaceZone[surfI];
+            const labelPair spr = surfaces_.whichSurface(globalI);
+            faceToZone[faceI] = surfaceToFaceZones[spr.first()][spr.second()];
         }
     }
 
diff --git a/src/mesh/snappyHexMesh/refinementSurfaces/refinementSurfaces.C b/src/mesh/snappyHexMesh/refinementSurfaces/refinementSurfaces.C
index 59a3fc0cb1..e8d81b3e5c 100644
--- a/src/mesh/snappyHexMesh/refinementSurfaces/refinementSurfaces.C
+++ b/src/mesh/snappyHexMesh/refinementSurfaces/refinementSurfaces.C
@@ -123,6 +123,34 @@ Foam::labelList Foam::refinementSurfaces::findHigherLevel
 }
 
 
+Foam::labelList Foam::refinementSurfaces::calcSurfaceIndex
+(
+    const searchableSurfaces& allGeometry,
+    const labelList& surfaces
+)
+{
+    // Determine overall number of global regions
+    label globalI = 0;
+    forAll(surfaces, surfI)
+    {
+        globalI += allGeometry[surfaces[surfI]].regions().size();
+    }
+
+    labelList regionToSurface(globalI);
+    globalI = 0;
+    forAll(surfaces, surfI)
+    {
+        const label nLocal = allGeometry[surfaces[surfI]].regions().size();
+        for (label i = 0; i < nLocal; i++)
+        {
+            regionToSurface[globalI++] = surfI;
+        }
+    }
+
+    return regionToSurface;
+}
+
+
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 Foam::refinementSurfaces::refinementSurfaces
@@ -276,7 +304,16 @@ Foam::refinementSurfaces::refinementSurfaces
             const searchableSurface& surface = allGeometry_[surfaces_[surfI]];
 
             // Surface zones
-            surfZones_.set(surfI, new surfaceZonesInfo(surface, dict));
+            surfZones_.set
+            (
+                surfI,
+                new surfaceZonesInfo
+                (
+                    surface,
+                    dict,
+                    allGeometry_.regionNames()[surfaces_[surfI]]
+                )
+            );
 
             // Global perpendicular angle
             if (dict.found("patchInfo"))
@@ -433,6 +470,10 @@ Foam::refinementSurfaces::refinementSurfaces
     }
 
     // Rework surface specific information into information per global region
+
+    regionToSurface_ = calcSurfaceIndex(allGeometry_, surfaces_);
+
+
     minLevel_.setSize(nRegions);
     minLevel_ = 0;
     maxLevel_.setSize(nRegions);
@@ -539,6 +580,7 @@ Foam::refinementSurfaces::refinementSurfaces
     names_(names),
     surfZones_(surfZones),
     regionOffset_(regionOffset),
+    regionToSurface_(calcSurfaceIndex(allGeometry, surfaces)),
     minLevel_(minLevel),
     maxLevel_(maxLevel),
     gapLevel_(gapLevel),
@@ -558,6 +600,17 @@ Foam::refinementSurfaces::refinementSurfaces
 
 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
+Foam::labelPair Foam::refinementSurfaces::whichSurface
+(
+    const label globalRegionI
+) const
+{
+    const label surfI = regionToSurface_[globalRegionI];
+    const label localI = globalRegionI-regionOffset_[surfI];
+    return labelPair(surfI, localI);
+}
+
+
 // // Count number of triangles per surface region
 // Foam::labelList Foam::refinementSurfaces::countRegions(const triSurface& s)
 // {
diff --git a/src/mesh/snappyHexMesh/refinementSurfaces/refinementSurfaces.H b/src/mesh/snappyHexMesh/refinementSurfaces/refinementSurfaces.H
index 6ac647a406..d5219f77b0 100644
--- a/src/mesh/snappyHexMesh/refinementSurfaces/refinementSurfaces.H
+++ b/src/mesh/snappyHexMesh/refinementSurfaces/refinementSurfaces.H
@@ -77,9 +77,12 @@ class refinementSurfaces
         //- List of surface zone (face and cell zone) information
         PtrList<surfaceZonesInfo> surfZones_;
 
-        //- From local region number to global region number
+        //- From surface to starting global region
         labelList regionOffset_;
 
+        //- From global region number to surface
+        labelList regionToSurface_;
+
         //- From global region number to refinement level
         labelList minLevel_;
 
@@ -121,6 +124,13 @@ class refinementSurfaces
             const labelList& surfaceLevel
         ) const;
 
+        //- Calculate global region to surface
+        static labelList calcSurfaceIndex
+        (
+            const searchableSurfaces& allGeometry,
+            const labelList& surfaces
+        );
+
         //- No copy construct
         refinementSurfaces(const refinementSurfaces&) = delete;
 
@@ -183,7 +193,7 @@ public:
                 return surfZones_;
             }
 
-            //- From local region number to global region number
+            //- From surface to starting global region
             const labelList& regionOffset() const
             {
                 return regionOffset_;
@@ -252,6 +262,9 @@ public:
                 return regionOffset_[surfI]+regionI;
             }
 
+            //- From global region to surface + region
+            labelPair whichSurface(const label globalRegionI) const;
+
             //- Min level for surface and region on surface
             label minLevel(const label surfI, const label regionI) const
             {
diff --git a/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.C b/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.C
index 18099b110f..d4efaf867e 100644
--- a/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.C
+++ b/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.C
@@ -47,6 +47,18 @@ Foam::surfaceZonesInfo::areaSelectionAlgoNames
 });
 
 
+const Foam::Enum
+<
+    Foam::surfaceZonesInfo::faceZoneNaming
+>
+Foam::surfaceZonesInfo::faceZoneNamingNames
+({
+    { faceZoneNaming::NOZONE, "none" },
+    { faceZoneNaming::SINGLE, "single" },
+    { faceZoneNaming::REGION, "region" }
+});
+
+
 const Foam::Enum
 <
     Foam::surfaceZonesInfo::faceZoneType
@@ -64,18 +76,77 @@ Foam::surfaceZonesInfo::faceZoneTypeNames
 Foam::surfaceZonesInfo::surfaceZonesInfo
 (
     const searchableSurface& surface,
-    const dictionary& surfacesDict
+    const dictionary& surfacesDict,
+    const wordList& regionNames
 )
 :
-    faceZoneName_(),
+    faceZoneNames_(),
     cellZoneName_(),
     zoneInside_(NONE),
     zoneInsidePoint_(point::min),
     faceType_(INTERNAL)
 {
-    // Global zone names per surface
-    if (surfacesDict.readIfPresent("faceZone", faceZoneName_))
+    const label nRegions = surface.regions().size();
+
+    // Old syntax
+    surfaceZonesInfo::faceZoneNaming namingType = faceZoneNaming::NOZONE;
+
+    word namingMethod;
+    word faceZoneName;
+    if (surfacesDict.readIfPresent("faceZone", faceZoneName))
     {
+        // Single zone name per surface
+        if (surfacesDict.found("faceZoneNaming"))
+        {
+            FatalIOErrorInFunction(surfacesDict)
+                << "Cannot provide both \"faceZone\" and \"faceZoneNaming\""
+                << exit(FatalIOError);
+        }
+
+        namingType = faceZoneNaming::SINGLE;
+        faceZoneNames_.setSize(nRegions, faceZoneName);
+    }
+    else if (surfacesDict.readIfPresent("faceZoneNaming", namingMethod))
+    {
+        //namingType = faceZoneNamingNames.get("faceZoneNaming", surfacesDict);
+        namingType = faceZoneNamingNames[namingMethod];
+
+        // Generate faceZone names. Maybe make runtime-selection table?
+        switch (namingType)
+        {
+            case faceZoneNaming::NOZONE:
+            break;
+
+            case faceZoneNaming::SINGLE:
+            {
+                // Should already be handled above
+                faceZoneNames_.setSize
+                (
+                    nRegions,
+                    surfacesDict.get<word>("faceZone")
+                );
+            }
+            break;
+
+            case faceZoneNaming::REGION:
+            {
+                faceZoneNames_ = regionNames;
+            }
+            break;
+        }
+    }
+
+    if (faceZoneNames_.size())
+    {
+        if (faceZoneNames_.size() != nRegions)
+        {
+            FatalIOErrorInFunction(surfacesDict)
+                << "Number of faceZones (through 'faceZones' keyword)"
+                << " does not correspond to the number of regions "
+                << nRegions << " in surface " << surface.name()
+                << exit(FatalIOError);
+        }
+
         // Read optional entry to determine inside of faceZone
 
         word method;
@@ -116,8 +187,8 @@ Foam::surfaceZonesInfo::surfaceZonesInfo
                 IOWarningInFunction(surfacesDict)
                     << "Illegal entry zoneInside "
                     << areaSelectionAlgoNames[zoneInside_]
-                    << " for faceZone "
-                    << faceZoneName_
+                    << " for faceZones "
+                    << faceZoneNames_
                     << " since surface is not closed." << endl;
             }
         }
@@ -125,7 +196,7 @@ Foam::surfaceZonesInfo::surfaceZonesInfo
         {
             IOWarningInFunction(surfacesDict)
                 << "Unused entry zoneInside for faceZone "
-                << faceZoneName_
+                << faceZoneNames_
                 << " since no cellZone specified."
                 << endl;
         }
@@ -142,14 +213,14 @@ Foam::surfaceZonesInfo::surfaceZonesInfo
 
 Foam::surfaceZonesInfo::surfaceZonesInfo
 (
-    const word& faceZoneName,
+    const wordList& faceZoneNames,
     const word& cellZoneName,
     const areaSelectionAlgo& zoneInside,
     const point& zoneInsidePoint,
     const faceZoneType& faceType
 )
 :
-    faceZoneName_(faceZoneName),
+    faceZoneNames_(faceZoneNames),
     cellZoneName_(cellZoneName),
     zoneInside_(zoneInside),
     zoneInsidePoint_(zoneInsidePoint),
@@ -159,7 +230,7 @@ Foam::surfaceZonesInfo::surfaceZonesInfo
 
 Foam::surfaceZonesInfo::surfaceZonesInfo(const surfaceZonesInfo& surfZone)
 :
-    faceZoneName_(surfZone.faceZoneName()),
+    faceZoneNames_(surfZone.faceZoneNames()),
     cellZoneName_(surfZone.cellZoneName()),
     zoneInside_(surfZone.zoneInside()),
     zoneInsidePoint_(surfZone.zoneInsidePoint()),
@@ -177,7 +248,7 @@ Foam::labelList Foam::surfaceZonesInfo::getUnnamedSurfaces
     label i = 0;
     forAll(surfList, surfI)
     {
-        if (surfList[surfI].faceZoneName().empty())
+        if (surfList[surfI].faceZoneNames().empty())
         {
             anonymousSurfaces[i++] = surfI;
         }
@@ -201,7 +272,7 @@ Foam::labelList Foam::surfaceZonesInfo::getNamedSurfaces
         if
         (
             surfList.set(surfI)
-         && surfList[surfI].faceZoneName().size()
+         && surfList[surfI].faceZoneNames().size()
         )
         {
             namedSurfaces[namedI++] = surfI;
@@ -226,7 +297,7 @@ Foam::labelList Foam::surfaceZonesInfo::getStandaloneNamedSurfaces
         if
         (
             surfList.set(surfI)
-        &&  surfList[surfI].faceZoneName().size()
+        &&  surfList[surfI].faceZoneNames().size()
         && !surfList[surfI].cellZoneName().size()
         )
         {
@@ -468,14 +539,14 @@ Foam::label Foam::surfaceZonesInfo::addFaceZone
 }
 
 
-Foam::labelList Foam::surfaceZonesInfo::addFaceZonesToMesh
+Foam::labelListList Foam::surfaceZonesInfo::addFaceZonesToMesh
 (
     const PtrList<surfaceZonesInfo>& surfList,
     const labelList& namedSurfaces,
     polyMesh& mesh
 )
 {
-    labelList surfaceToFaceZone(surfList.size(), -1);
+    labelListList surfaceToFaceZones(surfList.size());
 
     faceZoneMesh& faceZones = mesh.faceZones();
 
@@ -483,17 +554,23 @@ Foam::labelList Foam::surfaceZonesInfo::addFaceZonesToMesh
     {
         label surfI = namedSurfaces[i];
 
-        const word& faceZoneName = surfList[surfI].faceZoneName();
+        const wordList& faceZoneNames = surfList[surfI].faceZoneNames();
 
-        label zoneI = addFaceZone
-        (
-            faceZoneName,   //name
-            labelList(0),   //addressing
-            boolList(0),    //flipmap
-            mesh
-        );
+        surfaceToFaceZones[surfI].setSize(faceZoneNames.size(), -1);
+        forAll(faceZoneNames, j)
+        {
+            const word& faceZoneName = faceZoneNames[j];
 
-        surfaceToFaceZone[surfI] = zoneI;
+            label zoneI = addFaceZone
+            (
+                faceZoneName,   //name
+                labelList(0),   //addressing
+                boolList(0),    //flipmap
+                mesh
+            );
+
+            surfaceToFaceZones[surfI][j] = zoneI;
+        }
     }
 
     // Check they are synced
@@ -515,7 +592,7 @@ Foam::labelList Foam::surfaceZonesInfo::addFaceZonesToMesh
         }
     }
 
-    return surfaceToFaceZone;
+    return surfaceToFaceZones;
 }
 
 
diff --git a/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.H b/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.H
index f3344db227..f22e635620 100644
--- a/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.H
+++ b/src/mesh/snappyHexMesh/refinementSurfaces/surfaceZonesInfo.H
@@ -73,6 +73,16 @@ public:
 
     static const Enum<areaSelectionAlgo> areaSelectionAlgoNames;
 
+    //- How to generate faceZone name
+    enum faceZoneNaming
+    {
+        NOZONE,
+        SINGLE,
+        REGION
+    };
+
+    static const Enum<faceZoneNaming> faceZoneNamingNames;
+
     //- What to do with faceZone faces
     enum faceZoneType
     {
@@ -88,8 +98,8 @@ private:
 
     // Private data
 
-        //- Per 'interface' surface : name of faceZone to put faces into
-        word faceZoneName_;
+        //- Per 'interface' surface : names of faceZones to put faces into
+        wordList faceZoneNames_;
 
         //- Per 'interface' surface : name of cellZone to put cells into
         word cellZoneName_;
@@ -117,17 +127,19 @@ public:
 
     // Constructors
 
-        //- Construct from surfaces and dictionary
+        //- Construct from surfaces and dictionary and fully resolved
+        //  region names (for optional automatic faceZone naming)
         surfaceZonesInfo
         (
             const searchableSurface& surface,
-            const dictionary& surfacesDict
+            const dictionary& surfacesDict,
+            const wordList& regionNames
         );
 
         //- Construct from components
         surfaceZonesInfo
         (
-            const word& faceZoneNames,
+            const wordList& faceZoneNames,
             const word& cellZoneNames,
             const areaSelectionAlgo& zoneInside,
             const point& zoneInsidePoints,
@@ -148,11 +160,11 @@ public:
 
         // Access
 
-            //- Per 'interface' surface : empty or name of faceZone to put
-            //  faces into
-            const word& faceZoneName() const
+            //- Per 'interface' surface : empty or names of faceZones to put
+            //  faces into (according to region)
+            const wordList& faceZoneNames() const
             {
-                return faceZoneName_;
+                return faceZoneNames_;
             }
 
             //- Per 'interface' surface : empty or name of cellZone to put
@@ -254,7 +266,7 @@ public:
                 polyMesh& mesh
             );
 
-            static labelList addFaceZonesToMesh
+            static labelListList addFaceZonesToMesh
             (
                 const PtrList<surfaceZonesInfo>& surfList,
                 const labelList& namedSurfaces,
diff --git a/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriver.C b/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriver.C
index 76da0c45df..ab7c3f2113 100644
--- a/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriver.C
+++ b/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriver.C
@@ -928,11 +928,13 @@ void Foam::snappySnapDriver::preSmoothPatch
 
 
 // Get (pp-local) indices of points that are both on zone and on patched surface
-Foam::labelList Foam::snappySnapDriver::getZoneSurfacePoints
+void Foam::snappySnapDriver::getZoneSurfacePoints
 (
     const fvMesh& mesh,
     const indirectPrimitivePatch& pp,
-    const word& zoneName
+    const word& zoneName,
+
+    bitSet& pointOnZone
 )
 {
     label zonei = mesh.faceZones().findZoneID(zoneName);
@@ -950,8 +952,6 @@ Foam::labelList Foam::snappySnapDriver::getZoneSurfacePoints
     // Could use PrimitivePatch & localFaces to extract points but might just
     // as well do it ourselves.
 
-    boolList pointOnZone(pp.nPoints(), false);
-
     forAll(fZone, i)
     {
         const face& f = mesh.faces()[fZone[i]];
@@ -969,8 +969,6 @@ Foam::labelList Foam::snappySnapDriver::getZoneSurfacePoints
             }
         }
     }
-
-    return findIndices(pointOnZone, true);
 }
 
 
@@ -1544,124 +1542,128 @@ void Foam::snappySnapDriver::detectNearSurfaces
         forAll(zonedSurfaces, i)
         {
             label zoneSurfi = zonedSurfaces[i];
-
-            const word& faceZoneName = surfZones[zoneSurfi].faceZoneName();
-
             const labelList surfacesToTest(1, zoneSurfi);
 
-            // Get indices of points both on faceZone and on pp.
-            labelList zonePointIndices
-            (
+            const wordList& faceZoneNames =
+                surfZones[zoneSurfi].faceZoneNames();
+            forAll(faceZoneNames, namei)
+            {
+                const word& faceZoneName = faceZoneNames[namei];
+
+                // Get indices of points both on faceZone and on pp.
+                bitSet pointOnZone(pp.nPoints());
                 getZoneSurfacePoints
                 (
                     mesh,
                     pp,
-                    faceZoneName
-                )
-            );
+                    faceZoneName,
+                    pointOnZone
+                );
+                const labelList zonePointIndices(pointOnZone.toc());
 
-            // Do intersection test
-            labelList surface1;
-            List<pointIndexHit> hit1;
-            labelList region1;
-            vectorField normal1;
+                // Do intersection test
+                labelList surface1;
+                List<pointIndexHit> hit1;
+                labelList region1;
+                vectorField normal1;
 
-            labelList surface2;
-            List<pointIndexHit> hit2;
-            labelList region2;
-            vectorField normal2;
-            surfaces.findNearestIntersection
-            (
-                surfacesToTest,
-                pointField(start, zonePointIndices),
-                pointField(end, zonePointIndices),
+                labelList surface2;
+                List<pointIndexHit> hit2;
+                labelList region2;
+                vectorField normal2;
+                surfaces.findNearestIntersection
+                (
+                    surfacesToTest,
+                    pointField(start, zonePointIndices),
+                    pointField(end, zonePointIndices),
 
-                surface1,
-                hit1,
-                region1,
-                normal1,
+                    surface1,
+                    hit1,
+                    region1,
+                    normal1,
 
-                surface2,
-                hit2,
-                region2,
-                normal2
-            );
+                    surface2,
+                    hit2,
+                    region2,
+                    normal2
+                );
 
 
-            forAll(hit1, i)
-            {
-                label pointi = zonePointIndices[i];
-
-                // Current location
-                const point& pt = localPoints[pointi];
-
-                bool override = false;
-
-                //if (hit1[i].hit())
-                //{
-                //    if
-                //    (
-                //        meshRefiner_.isGap
-                //        (
-                //            planarCos,
-                //            nearestPoint[pointi],
-                //            nearestNormal[pointi],
-                //            hit1[i].hitPoint(),
-                //            normal1[i]
-                //        )
-                //    )
-                //    {
-                //        disp[pointi] = hit1[i].hitPoint()-pt;
-                //        override = true;
-                //    }
-                //}
-                //if (hit2[i].hit())
-                //{
-                //    if
-                //    (
-                //        meshRefiner_.isGap
-                //        (
-                //            planarCos,
-                //            nearestPoint[pointi],
-                //            nearestNormal[pointi],
-                //            hit2[i].hitPoint(),
-                //            normal2[i]
-                //        )
-                //    )
-                //    {
-                //        disp[pointi] = hit2[i].hitPoint()-pt;
-                //        override = true;
-                //    }
-                //}
-
-                if (hit1[i].hit() && hit2[i].hit())
+                forAll(hit1, i)
                 {
-                    if
-                    (
-                        meshRefiner_.isGap
-                        (
-                            planarCos,
-                            hit1[i].hitPoint(),
-                            normal1[i],
-                            hit2[i].hitPoint(),
-                            normal2[i]
-                        )
-                    )
+                    label pointi = zonePointIndices[i];
+
+                    // Current location
+                    const point& pt = localPoints[pointi];
+
+                    bool override = false;
+
+                    //if (hit1[i].hit())
+                    //{
+                    //    if
+                    //    (
+                    //        meshRefiner_.isGap
+                    //        (
+                    //            planarCos,
+                    //            nearestPoint[pointi],
+                    //            nearestNormal[pointi],
+                    //            hit1[i].hitPoint(),
+                    //            normal1[i]
+                    //        )
+                    //    )
+                    //    {
+                    //        disp[pointi] = hit1[i].hitPoint()-pt;
+                    //        override = true;
+                    //    }
+                    //}
+                    //if (hit2[i].hit())
+                    //{
+                    //    if
+                    //    (
+                    //        meshRefiner_.isGap
+                    //        (
+                    //            planarCos,
+                    //            nearestPoint[pointi],
+                    //            nearestNormal[pointi],
+                    //            hit2[i].hitPoint(),
+                    //            normal2[i]
+                    //        )
+                    //    )
+                    //    {
+                    //        disp[pointi] = hit2[i].hitPoint()-pt;
+                    //        override = true;
+                    //    }
+                    //}
+
+                    if (hit1[i].hit() && hit2[i].hit())
                     {
-                        if (gapStr.valid())
+                        if
+                        (
+                            meshRefiner_.isGap
+                            (
+                                planarCos,
+                                hit1[i].hitPoint(),
+                                normal1[i],
+                                hit2[i].hitPoint(),
+                                normal2[i]
+                            )
+                        )
                         {
-                            const point& intPt = hit2[i].hitPoint();
-                            gapStr().write(linePointRef(pt, intPt));
+                            if (gapStr.valid())
+                            {
+                                const point& intPt = hit2[i].hitPoint();
+                                gapStr().write(linePointRef(pt, intPt));
+                            }
+
+                            disp[pointi] = hit2[i].hitPoint()-pt;
+                            override = true;
                         }
-
-                        disp[pointi] = hit2[i].hitPoint()-pt;
-                        override = true;
                     }
-                }
 
-                if (override && isPatchMasterPoint[pointi])
-                {
-                    nOverride++;
+                    if (override && isPatchMasterPoint[pointi])
+                    {
+                        nOverride++;
+                    }
                 }
             }
         }
@@ -1950,15 +1952,15 @@ Foam::vectorField Foam::snappySnapDriver::calcNearestSurface
             }
 
 
-            const labelList zonedSurfaces =
-                surfaceZonesInfo::getNamedSurfaces
-                (
-                    meshRefiner.surfaces().surfZones()
-                );
+            const labelList zonedSurfaces = surfaceZonesInfo::getNamedSurfaces
+            (
+                meshRefiner.surfaces().surfZones()
+            );
 
 
             // 2. All points on zones to their respective surface
             // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+            // (ignoring faceZone subdivision)
 
             // Surfaces with zone information
             const PtrList<surfaceZonesInfo>& surfZones = surfaces.surfZones();
@@ -1966,26 +1968,27 @@ Foam::vectorField Foam::snappySnapDriver::calcNearestSurface
             forAll(zonedSurfaces, i)
             {
                 label surfi = zonedSurfaces[i];
-
-                const word& faceZoneName = surfZones[surfi].faceZoneName();
-
                 const labelList surfacesToTest(1, surfi);
+                const label geomi = surfaces.surfaces()[surfi];
+                const label nRegions =
+                    surfaces.geometry()[geomi].regions().size();
 
-                label geomi = surfaces.surfaces()[surfi];
-                label nRegions = surfaces.geometry()[geomi].regions().size();
+                const wordList& faceZoneNames =
+                    surfZones[surfi].faceZoneNames();
 
-
-                // Get indices of points both on faceZone and on pp.
-                labelList zonePointIndices
-                (
+                // Get indices of points both on any faceZone and on pp.
+                bitSet pointOnZone(pp.nPoints());
+                forAll(faceZoneNames, locali)
+                {
                     getZoneSurfacePoints
                     (
                         mesh,
                         pp,
-                        faceZoneName
-                    )
-                );
-
+                        faceZoneNames[locali],
+                        pointOnZone
+                    );
+                }
+                const labelList zonePointIndices(pointOnZone.toc());
 
                 calcNearestSurface
                 (
@@ -2278,9 +2281,12 @@ Foam::autoPtr<Foam::mapPolyMesh> Foam::snappySnapDriver::repatchToSurface
         forAll(zonedSurfaces, i)
         {
             const label zoneSurfi = zonedSurfaces[i];
-            const faceZone& fZone = fZones[surfZones[zoneSurfi].faceZoneName()];
-
-            isZonedFace.set(fZone);
+            const wordList& fZoneNames = surfZones[zoneSurfi].faceZoneNames();
+            forAll(fZoneNames, i)
+            {
+                const faceZone& fZone = fZones[fZoneNames[i]];
+                isZonedFace.set(fZone);
+            }
         }
     }
 
diff --git a/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriver.H b/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriver.H
index 9e0daacb9f..7d6a24ed14 100644
--- a/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriver.H
+++ b/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriver.H
@@ -157,11 +157,13 @@ class snappySnapDriver
             labelList getInternalOrBaffleDuplicateFace() const;
 
             //- Get points both on patch and facezone.
-            static labelList getZoneSurfacePoints
+            static void getZoneSurfacePoints
             (
                 const fvMesh& mesh,
                 const indirectPrimitivePatch&,
-                const word& zoneName
+                const word& zoneName,
+
+                bitSet& pointOnZone
             );
 
             //- Get points both on patch and facezone.
diff --git a/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriverFeature.C b/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriverFeature.C
index ce32b8e0af..29f54124f5 100644
--- a/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriverFeature.C
+++ b/src/mesh/snappyHexMesh/snappyHexMeshDriver/snappySnapDriverFeature.C
@@ -263,34 +263,41 @@ void Foam::snappySnapDriver::calcNearestFace
     {
         label zoneSurfi = zonedSurfaces[i];
 
-        const word& faceZoneName = surfZones[zoneSurfi].faceZoneName();
+        const wordList& faceZoneNames = surfZones[zoneSurfi].faceZoneNames();
 
         // Get indices of faces on pp that are also in zone
-        label zonei = mesh.faceZones().findZoneID(faceZoneName);
-        if (zonei == -1)
+        DynamicList<label> ppFaces;
+        DynamicList<label> meshFaces;
+        forAll(faceZoneNames, fzi)
         {
-            FatalErrorInFunction
-                << "Problem. Cannot find zone " << faceZoneName
-                << exit(FatalError);
-        }
-        const faceZone& fZone = mesh.faceZones()[zonei];
-        const bitSet isZonedFace(mesh.nFaces(), fZone);
-
-        DynamicList<label> ppFaces(fZone.size());
-        DynamicList<label> meshFaces(fZone.size());
-        forAll(pp.addressing(), i)
-        {
-            if (isZonedFace[pp.addressing()[i]])
+            const word& faceZoneName = faceZoneNames[fzi];
+            label zonei = mesh.faceZones().findZoneID(faceZoneName);
+            if (zonei == -1)
             {
-                snapSurf[i] = zoneSurfi;
-                ppFaces.append(i);
-                meshFaces.append(pp.addressing()[i]);
+                FatalErrorInFunction
+                    << "Problem. Cannot find zone " << faceZoneName
+                    << exit(FatalError);
             }
-        }
+            const faceZone& fZone = mesh.faceZones()[zonei];
+            const bitSet isZonedFace(mesh.nFaces(), fZone);
 
-        //Pout<< "For faceZone " << fZone.name()
-        //    << " found " << ppFaces.size() << " out of " << pp.size()
-        //    << endl;
+            ppFaces.reserve(ppFaces.capacity()+fZone.size());
+            meshFaces.reserve(meshFaces.capacity()+fZone.size());
+
+            forAll(pp.addressing(), i)
+            {
+                if (isZonedFace[pp.addressing()[i]])
+                {
+                    snapSurf[i] = zoneSurfi;
+                    ppFaces.append(i);
+                    meshFaces.append(pp.addressing()[i]);
+                }
+            }
+
+            //Pout<< "For faceZone " << fZone.name()
+            //    << " found " << ppFaces.size() << " out of " << pp.size()
+            //    << endl;
+        }
 
         pointField fc
         (
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/Allclean b/tutorials/mesh/snappyHexMesh/faceZoneRegions/Allclean
new file mode 100755
index 0000000000..09925d447d
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/Allclean
@@ -0,0 +1,14 @@
+#!/bin/sh
+cd ${0%/*} || exit 1                        # Run from this directory
+. $WM_PROJECT_DIR/bin/tools/CleanFunctions  # Tutorial clean functions
+
+cleanCase
+
+# Remove surface and features
+rm -rf constant/extendedFeatureEdgeMesh > /dev/null 2>&1
+rm -f constant/triSurface/rotatingZone.eMesh > /dev/null 2>&1
+rm -f constant/triSurface/fixed.eMesh > /dev/null 2>&1
+rm -f 0/pointLevel > /dev/null 2>&1
+rm -f 0/cellLevel > /dev/null 2>&1
+
+#------------------------------------------------------------------------------
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/Allrun b/tutorials/mesh/snappyHexMesh/faceZoneRegions/Allrun
new file mode 100755
index 0000000000..f17485adff
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/Allrun
@@ -0,0 +1,10 @@
+#!/bin/sh
+cd ${0%/*} || exit 1                        # Run from this directory
+. $WM_PROJECT_DIR/bin/tools/RunFunctions    # Tutorial run functions
+
+# Meshing
+runApplication blockMesh
+runApplication surfaceFeatureExtract
+runApplication snappyHexMesh
+
+#------------------------------------------------------------------------------
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/README.txt b/tutorials/mesh/snappyHexMesh/faceZoneRegions/README.txt
new file mode 100644
index 0000000000..d425868ce7
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/README.txt
@@ -0,0 +1,2 @@
+Block (as cellZone) inside cylinder. Demonstrates naming faceZones
+on outside of the cellZone according to surface name, surface region.
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/constant/triSurface/box-randomAligned.stl b/tutorials/mesh/snappyHexMesh/faceZoneRegions/constant/triSurface/box-randomAligned.stl
new file mode 100644
index 0000000000..0ff4e393b6
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/constant/triSurface/box-randomAligned.stl
@@ -0,0 +1,1076 @@
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diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/constant/triSurface/rotatingZone.obj b/tutorials/mesh/snappyHexMesh/faceZoneRegions/constant/triSurface/rotatingZone.obj
new file mode 100644
index 0000000000..acb86d9880
--- /dev/null
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+f 1874 1875 1882
+f 1858 1850 1853
+f 1836 1826 1858
+f 1826 1069 1858
+f 1845 1836 1858
+f 1057 1060 1064
+f 1057 1064 1069
+f 1128 1874 1139
+f 1866 1865 1139
+f 1874 1866 1139
+f 1069 1057 1045
+f 1139 1128 1129
+f 1045 1052 1057
+f 1139 1129 1137
+f 1862 1858 1045
+f 1863 1862 1045
+f 1858 1069 1045
+f 1863 1045 1869
+f 1869 1045 1877
+f 1148 1139 1141
+f 1852 1854 1860
+f 1852 1860 1865
+f 1045 1044 1877
+f 1139 1865 1852
+f 1877 1869 1870
+f 1139 1852 1152
+f 1877 1044 1880
+f 1152 1139 1148
+f 1852 1844 1154
+f 1152 1852 1154
+f 1025 1033 1036
+f 1025 1036 1040
+f 1025 1040 1044
+f 1885 1880 1884
+f 1880 1044 1024
+f 1044 1025 1024
+f 1885 1880 1021
+f 1880 1024 1021
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/blockMeshDict b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/blockMeshDict
new file mode 100644
index 0000000000..d0c78e4a71
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/blockMeshDict
@@ -0,0 +1,68 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v1906                                 |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      blockMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+backgroundMesh
+{
+    xMin      -1.26;
+    xMax       1.26;
+    yMin      -2.01;
+    yMax       2.01;
+    zMin      -1.26;
+    zMax       1.26;
+    xCells    12;
+    yCells    22;
+    zCells    12;
+}
+
+scale   1;
+
+vertices
+(
+    ($:backgroundMesh.xMin $:backgroundMesh.yMin $:backgroundMesh.zMin)
+    ($:backgroundMesh.xMax $:backgroundMesh.yMin $:backgroundMesh.zMin)
+    ($:backgroundMesh.xMax $:backgroundMesh.yMax $:backgroundMesh.zMin)
+    ($:backgroundMesh.xMin $:backgroundMesh.yMax $:backgroundMesh.zMin)
+
+    ($:backgroundMesh.xMin $:backgroundMesh.yMin $:backgroundMesh.zMax)
+    ($:backgroundMesh.xMax $:backgroundMesh.yMin $:backgroundMesh.zMax)
+    ($:backgroundMesh.xMax $:backgroundMesh.yMax $:backgroundMesh.zMax)
+    ($:backgroundMesh.xMin $:backgroundMesh.yMax $:backgroundMesh.zMax)
+);
+
+blocks
+(
+    hex (0 1 2 3 4 5 6 7)
+    (
+        $:backgroundMesh.xCells
+        $:backgroundMesh.yCells
+        $:backgroundMesh.zCells
+    )
+    simpleGrading (1 1 1)
+);
+
+edges
+(
+);
+
+boundary
+(
+);
+
+mergePatchPairs
+(
+);
+
+// ************************************************************************* //
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/controlDict b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/controlDict
new file mode 100644
index 0000000000..30aa2656c6
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/controlDict
@@ -0,0 +1,47 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v1906                                 |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      controlDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+application     simpleFoam;
+
+startFrom       startTime;
+
+startTime       0;
+
+stopAt          endTime;
+
+endTime         1000;
+
+deltaT          1;
+
+writeControl    timeStep;
+
+writeInterval   50;
+
+purgeWrite      0;
+
+writeFormat     ascii;
+
+writePrecision   8;
+
+writeCompression off;
+
+timeFormat      general;
+
+timePrecision   6;
+
+runTimeModifiable true;
+
+// ************************************************************************* //
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvOptions b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvOptions
new file mode 100644
index 0000000000..290ab94afe
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvOptions
@@ -0,0 +1,102 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v1906                                 |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      fvOptions;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+disk
+{
+    type            rotorDisk;
+
+    selectionMode   cellZone;
+    cellZone        rotatingZone;
+
+    fields          (U);    // Names of fields on which to apply source
+    nBlades         3;      // Number of blades
+    tipEffect       0.96;   // Normalised radius above which lift = 0
+
+    inletFlowType   local;  // Inlet flow type specification
+    inletVelocity   (0 1 0);
+
+    geometryMode    specified;
+
+    origin          (0 0 0);
+    axis            (0 1 0);
+
+    refDirection    (0 0 1);  // Reference direction
+                              // - used as reference for psi angle
+    rpm             1000;
+    //pointAbove    (0 0 0.25);
+
+    trimModel       fixedTrim;  // fixed || targetForce
+
+    rhoRef          1000;
+    rhoInf          1;
+
+    fixedTrimCoeffs
+    {
+         theta0         0;
+         theta1c        0;
+         theta1s        0;
+    }
+
+    flapCoeffs
+    {
+        beta0           0;  // Coning angle [deg]
+        beta1c          0;  // Lateral flapping coeff (cos coeff)
+        beta2s          0;  // Longitudinal flapping coeff (sin coeff)
+    }
+
+    blade
+    {
+        data
+        (
+            (profile1 (0.1 -6 0.02))
+            (profile1 (0.25 -6 0.02))
+        );
+    }
+
+    profiles
+    {
+        profile1
+        {
+            type lookup;
+            data
+            (
+                (-90 0.21 1.45)
+                (-18 0.21 1.45)
+                (-16 0.165 1.3)
+                (-14 0.125 1.1)
+                (-12 0.092 0.95)
+                (-10 0.07 0.8)
+                (-8 0.05 0.64)
+                (-6 0.04 0.5)
+                (-4 0.028 0.32)
+                (-2 0.022 0.18)
+                (0 0.02 0)
+                (2 0.022 0.18)
+                (4 0.028 0.32)
+                (6 0.04 0.5)
+                (8 0.05 0.64)
+                (10 0.07 0.8)
+                (12 0.092 0.95)
+                (14 0.125 1.1)
+                (16 0.165 1.3)
+                (18 0.21 1.45)
+                (90 0.21 1.45)
+            );
+        }
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvSchemes b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvSchemes
new file mode 100644
index 0000000000..8b0eb567b4
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvSchemes
@@ -0,0 +1,66 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v1906                                 |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      fvSchemes;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+ddtSchemes
+{
+    default         steadyState;
+}
+
+gradSchemes
+{
+    default         Gauss linear;
+
+    limited         cellLimited Gauss linear 1;
+    grad(U)         $limited;
+    grad(k)         $limited;
+    grad(omega)     $limited;
+}
+
+divSchemes
+{
+    default         none;
+
+    div(phi,U)      bounded Gauss linearUpwind unlimited;
+
+    turbulence      bounded Gauss linearUpwind limited;
+    div(phi,k)      $turbulence;
+    div(phi,omega)  $turbulence;
+    div(phi,epsilon) $turbulence;
+    div((nuEff*dev(T(grad(U))))) Gauss linear;
+    div((nuEff*dev2(T(grad(U))))) Gauss linear;
+}
+
+laplacianSchemes
+{
+    default         Gauss linear corrected;
+}
+
+interpolationSchemes
+{
+    default         linear;
+}
+
+snGradSchemes
+{
+    default         corrected;
+}
+
+wallDist
+{
+    method meshWave;
+}
+
+// ************************************************************************* //
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvSolution b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvSolution
new file mode 100644
index 0000000000..267ce3dd90
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/fvSolution
@@ -0,0 +1,58 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v1906                                 |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      fvSolution;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+solvers
+{
+    p
+    {
+        solver          GAMG;
+        smoother        GaussSeidel;
+        tolerance       1e-6;
+        relTol          0.1;
+    }
+
+    "(U|k|omega|epsilon)"
+    {
+        solver          smoothSolver;
+        smoother        symGaussSeidel;
+        tolerance       1e-6;
+        relTol          0.1;
+    }
+}
+
+SIMPLE
+{
+    nNonOrthogonalCorrectors 0;
+    consistent      yes;
+
+    residualControl
+    {
+        U                   1e-4;
+        p                   1e-3;
+        "(k|epsilon|omega)" 1e-3;
+    }
+}
+
+relaxationFactors
+{
+    equations
+    {
+        U                   0.95;
+        "(k|omega|epsilon)" 0.95;
+    }
+}
+
+// ************************************************************************* //
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/meshQualityDict b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/meshQualityDict
new file mode 100644
index 0000000000..c8b746388f
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/meshQualityDict
@@ -0,0 +1,22 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v1906                                 |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      meshQualityDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#includeEtc "caseDicts/mesh/generation/meshQualityDict.cfg"
+
+//- minFaceWeight (0 -> 0.5)
+//minFaceWeight 0.02;
+
+// ************************************************************************* //
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/snappyHexMeshDict b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/snappyHexMeshDict
new file mode 100644
index 0000000000..1f5eac7122
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/snappyHexMeshDict
@@ -0,0 +1,166 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v1906                                 |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      snappyHexMeshDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#includeEtc "caseDicts/mesh/generation/snappyHexMeshDict.cfg"
+
+castellatedMesh on;
+snap            on;
+addLayers       off;
+
+geometry
+{
+    dummy
+    {
+        type    box;
+        min     (0 0 0);
+        max     (1 1 1);
+    }
+    fixed.obj
+    {
+        // Rename some of the regions inside the obj file
+        type triSurfaceMesh;
+        name fixed;
+        regions
+        {
+            patch0 { name slipWall; }
+            patch1 { name outlet; }
+            patch2 { name inlet; }
+        }
+    }
+
+    box-randomAligned.stl
+    {
+        // Rename some of the regions inside the obj file
+        type triSurfaceMesh;
+        name rotatingZone;
+        regions
+        {
+            front { name myFront; }
+        }
+    }
+}
+
+castellatedMeshControls
+{
+    features
+    (
+      { file "fixed.eMesh"; level 2; }
+      { file "rotatingZone.eMesh"; level 4; }
+    );
+
+    refinementSurfaces
+    {
+        fixed
+        {
+            level       (2 2);
+            patchInfo   { type wall; }
+            inGroups    (fixed);
+
+            // Override per-patch information
+            regions
+            {
+                patch0
+                {
+                    level (3 3);
+                    patchInfo { type patch; }
+                }
+
+                patch1
+                {
+                    level (2 2);
+                    patchInfo { type patch; }
+                }
+
+                patch2
+                {
+                    level (2 2);
+                    patchInfo { type patch; }
+                }
+            }
+        }
+        rotatingZone
+        {
+            level       (4 4);
+
+            // How to handle faceZones
+            //  a. no faceZone. No keyword 'faceZone' or 'faceZoneNaming'
+            //  b. single user-specified faceZone:
+            //      faceZone myZone;
+            //  c. faceZones according to the surface/region:
+            //      faceZoneNaming region;
+
+            // c. faceZones according to the surface/region
+            faceZoneNaming  region;
+
+            cellZone    rotatingZone;
+            cellZoneInside  inside;
+        }
+
+    }
+
+    refinementRegions
+    {
+        fixed
+        {
+            mode inside;
+            levels ((1e-5 1));
+        }
+        rotatingZone
+        {
+            mode inside;
+            levels ((1e-5 4));
+        }
+    }
+
+    locationInMesh (1e-5 -1e-2 1e-5);// Offset from (0 0 0) to avoid
+                                     // coinciding with face or edge and keep
+                                     // away from disk itself
+
+    allowFreeStandingZoneFaces  false;
+
+    // Optional: switch off topological test for cells to-be-squashed
+    //           and use geometric test instead
+    useTopologicalSnapDetection false;
+}
+
+snapControls
+{
+    tolerance 1.0;
+    implicitFeatureSnap     true;
+    strictRegionSnap        true;
+}
+
+addLayersControls
+{
+    layers
+    {
+    }
+
+    relativeSizes       true; // false, usually with firstLayerThickness
+    expansionRatio      1.2;
+    finalLayerThickness 0.5;
+    minThickness        1e-3;
+}
+
+meshQualityControls
+{
+//    minTetQuality -1e+30;
+}
+
+
+mergeTolerance 1e-6;
+
+// ************************************************************************* //
diff --git a/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/surfaceFeatureExtractDict b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/surfaceFeatureExtractDict
new file mode 100644
index 0000000000..7c7cdfb457
--- /dev/null
+++ b/tutorials/mesh/snappyHexMesh/faceZoneRegions/system/surfaceFeatureExtractDict
@@ -0,0 +1,27 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v1906                                 |
+|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       dictionary;
+    object      surfaceFeatureExtractDict;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+fixed.obj
+{
+    #includeEtc "caseDicts/surface/surfaceFeatureExtractDict.cfg"
+}
+
+rotatingZone.obj
+{
+    #includeEtc "caseDicts/surface/surfaceFeatureExtractDict.cfg"
+}
+
+// ************************************************************************* //