TUT: overset: demo some motion. See #2711.

tutorials/incompressible/overPimpleDyMFoam/cylinder/README.txt

@@ -1,8 +1,11 @@
-Transient, steady mesh
------------------------
+Transient, moving mesh
+----------------------
 
 cylinderMesh/
     For generating (2D) mesh cylinder mesh
 
 cylinderAndBackground/
     BlockMesh for background and running
+
+    0.orig/pointDisplacement set up to use table driven motion. Set bc of
+    walls to e.g. uniformValue (0 0 0) to have steady mesh.

tutorials/incompressible/overPimpleDyMFoam/cylinder/cylinderAndBackground/0.orig/cellDisplacement

@@ -0,0 +1,47 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+| =========                 |                                                 |
+| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
+|  \\    /   O peration     | Version:  v2306                                 |
+|   \\  /    A nd           | Website:  www.openfoam.com                      |
+|    \\/     M anipulation  |                                                 |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    version     2.0;
+    format      ascii;
+    class       volVectorField;
+    object      cellDisplacement;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+dimensions      [0 1 0 0 0 0 0];
+
+internalField   uniform (0 0 0);
+
+boundaryField
+{
+    #includeEtc "caseDicts/setConstraintTypes"
+
+    overset
+    {
+        patchType       overset;
+        type            zeroGradient;
+    }
+
+    // Cylinder wall
+    walls
+    {
+        type            cellMotion;
+        value           $internalField;
+    }
+
+    // Outside patches
+    ".*"
+    {
+        type            cellMotion;
+        value           $internalField;
+    }
+}
+
+
+// ************************************************************************* //

tutorials/incompressible/overPimpleDyMFoam/cylinder/cylinderAndBackground/0.orig/pointDisplacement

@@ -20,18 +20,29 @@ internalField   uniform (0 0 0);
 
 boundaryField
 {
+    #includeEtc "caseDicts/setConstraintTypes"
+
     overset
     {
         patchType       overset;
         type            zeroGradient;
     }
 
+    // Cylinder wall
     walls
     {
         type            uniformFixedValue;
-        uniformValue    (0 0 0);
+        uniformValue    table
+        (
+            (0      (0 0  0))
+            (0.5    (0 0  1))
+            (1      (0 0  0))
+            (1.5    (0 0 -1))
+            (2      (0 0  0))
+        );
     }
 
+    // Outside patches
     ".*"
     {
         type            uniformFixedValue;