TUT: use general 'scale' instead of 'convertToMeters' in blockMeshDict

- although this has been supported for many years, the tutorials
  continued to use "convertToMeters" entry, which is specific to blockMesh.
  The "scale" is more consistent with other dictionaries.

ENH:
- ignore "scale 0;" (treat as no scaling) for blockMeshDict,
  consistent with use elsewhere.

etc/templates/axisymmetricJet/system/blockMeshDict

@@ -24,7 +24,7 @@ backgroundMesh
     rBcells 50;
 }
 
-convertToMeters 1;
+scale   1;
 
 vertices
 (

etc/templates/closedVolume/system/blockMeshDict

@@ -27,7 +27,7 @@ backgroundMesh
     zCells  20;
 }
 
-convertToMeters 1;
+scale   1;
 
 vertices
 (

etc/templates/closedVolumeRotating/system/blockMeshDict

@@ -58,7 +58,7 @@ geometry
     }
 }
 
-convertToMeters 1;
+scale   1;
 
 vertices
 (

etc/templates/closedVolumeRotating/system/blockMeshDict-box

@@ -27,7 +27,7 @@ backgroundMesh
     zCells  20;
 }
 
-convertToMeters 1;
+scale   1;
 
 vertices
 (

etc/templates/compressibleInflowOutflow/system/blockMeshDict

@@ -27,7 +27,7 @@ backgroundMesh
     zCells  20;
 }
 
-convertToMeters 1;
+scale   1;
 
 vertices
 (

etc/templates/inflowOutflow/system/blockMeshDict

@@ -27,7 +27,7 @@ backgroundMesh
     zCells  20;
 }
 
-convertToMeters 1;
+scale   1;
 
 vertices
 (

etc/templates/inflowOutflowRotating/system/blockMeshDict

@@ -58,7 +58,7 @@ geometry
     }
 }
 
-convertToMeters 1;
+scale   1;
 
 vertices
 (

etc/templates/inflowOutflowRotating/system/blockMeshDict-box

@@ -27,7 +27,7 @@ backgroundMesh
     zCells  20;
 }
 
-convertToMeters 1;
+scale   1;
 
 vertices
 (

src/mesh/blockMesh/blockMesh/blockMesh.H

@@ -157,7 +157,7 @@ class blockMesh
         void createPatches() const;
 
         //- As copy (not implemented)
-        blockMesh(const blockMesh&);
+        blockMesh(const blockMesh&) = delete;
 
 
 public:

src/mesh/blockMesh/blockMesh/blockMeshTopology.C

@@ -362,6 +362,12 @@ Foam::polyMesh* Foam::blockMesh::createTopology
         meshDescription.readIfPresent("scale", scaleFactor_);
     }
 
+    // Require (scale > 0), treat (scale <= 0) as scaling == 1 (no scaling).
+    if (scaleFactor_ <= 0)
+    {
+        scaleFactor_ = 1.0;
+    }
+
     // Read the block edges
     if (meshDescription.found("edges"))
     {

tutorials/DNS/dnsFoam/boxTurb16/system/blockMeshDict

@@ -14,7 +14,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-convertToMeters 1;
+scale   1;
 
 vertices
 (

tutorials/basic/overLaplacianDyMFoam/heatTransfer/system/blockMeshDict

@@ -14,7 +14,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-convertToMeters 1;
+scale   1;
 
 vertices
 (

tutorials/basic/potentialFoam/cylinder/system/blockMeshDict

@@ -14,7 +14,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-convertToMeters 1;
+scale   1;
 
 vertices #codeStream
 {

tutorials/basic/potentialFoam/pitzDaily/system/blockMeshDict

@@ -14,7 +14,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-convertToMeters 0.001;
+scale   0.001;
 
 vertices
 (

tutorials/basic/scalarTransportFoam/pitzDaily/system/blockMeshDict

@@ -14,7 +14,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-convertToMeters 0.001;
+scale   0.001;
 
 vertices
 (

tutorials/combustion/PDRFoam/flamePropagationWithObstacles/system/blockMeshDict

@@ -14,7 +14,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-convertToMeters 1.0;
+scale   1.0;
 
 vertices
 (

tutorials/combustion/XiDyMFoam/oscillatingCylinder/system/blockMeshDict

@@ -14,7 +14,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-convertToMeters 0.001;
+scale   0.001;
 
 vertices
 (

tutorials/combustion/XiFoam/RAS/moriyoshiHomogeneous/system/blockMeshDict

@@ -14,7 +14,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-convertToMeters 0.001;
+scale   0.001;
 
 vertices
 (

tutorials/combustion/fireFoam/LES/compartmentFire/system/blockMeshDict.m4

@@ -23,7 +23,7 @@ define(vlabel, [[// ]Vertex $1 = VCOUNT define($1, VCOUNT)define([VCOUNT], incr(
 define(pi, 3.14159265)
 define(angle, 45)
 
-convertToMeters 1;
+scale   1;
 
 /*  User parameter for geometry  */
 define(L_square, 0.06)

tutorials/combustion/fireFoam/LES/flameSpreadWaterSuppressionPanel/system/blockMeshDict

@@ -15,7 +15,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-convertToMeters 1;
+scale   1;
 
 vertices
 (