Feature overlapping zones

tutorials/mesh/parallel/filter/system/fvOptions

@@ -42,6 +42,29 @@ filter1
 }
 
 
+heater1
+{
+    // Add some additional water inside a cellZone that is nested inside
+    // the filter. This is just to demonstrate overlapping cellZones
+
+    type            scalarSemiImplicitSource;
+    active          yes;
+
+    timeStart       0.0;
+    duration        0.4;
+    volumeMode      specific;
+
+    selectionMode   cellZone;
+    cellZone        heater;
+
+    sources
+    {
+        rho         (1e-2 0); // kg/s/m^3
+        H2O         (1e-2 0); // kg/s/m^3
+    }
+}
+
+
 massSource1
 {
     type            scalarSemiImplicitSource;

tutorials/mesh/parallel/filter/system/topoSetDict

@@ -32,7 +32,6 @@ actions
         set     filterCells;
     }
 
-
     {
         name    leftFluidCells;
         type    cellSet;
@@ -114,6 +113,41 @@ actions
         source  setToFaceZone;
         faceSet cycRightFaces;   // name of faceSet
     }
+
+
+    // Additional zones inside filter
+
+    // heater inside filter
+    {
+        name    heaterCells;
+        type    cellSet;
+        action  new;
+        source  boxToCell;
+        box     (1.7 -10 -10) (1.8 10 10);
+    }
+    // Note: could be done directly using boxToCell
+    {
+        name    heater;
+        type    cellZoneSet;
+        action  new;
+        source  setToCellZone;
+        set     heaterCells;
+    }
+    {
+        name    heaterOutsideFaces;
+        type    faceSet;
+        action  new;
+        source  cellToFace;
+        set     heaterCells;
+        option  outside;
+    }
+    {
+        name    heaterOutside;
+        type    faceZoneSet;
+        action  new;
+        source  setToFaceZone;
+        faceSet heaterOutsideFaces;   // name of faceSet
+    }
 );