TUT: generalize (parameterize) blockMeshDict for half-cylinder geometries

- profit from some of the recent modifications to parser expansion

TUT: adjust some #eval statements for less clutter

tutorials/incompressible/pimpleFoam/LES/channel395DFSEM/system/controlDict

@@ -46,7 +46,7 @@ timePrecision   6;
 runTimeModifiable true;
 
 // Allow 10% run-up before calculating mean
-timeStart       #eval #{ 0.1 * ${/endTime} #};
+timeStart       #eval{ 0.1 * ${/endTime} };
 
 
 functions

tutorials/incompressible/simpleFoam/squareBend/system/blockMeshDict

@@ -40,22 +40,20 @@ nz      #eval{ round($nz / 5) };
 #endif
 
 zmin    #eval{ -$zmax };
-mrad0   #eval{ -$rad0 };
-mrad1   #eval{ -$rad1 };
 
 vertices
 (
     // back-plane:
     // inlet region
-    (  $xin  $rad0  $zmin)      // pt 0
-    (     0  $rad0  $zmin)      // pt 1
-    (     0  $rad1  $zmin)      // pt 2
-    (  $xin  $rad1  $zmin)      // pt 3
+    (  $xin   $rad0  $zmin)     // pt 0
+    (     0   $rad0  $zmin)     // pt 1
+    (     0   $rad1  $zmin)     // pt 2
+    (  $xin   $rad1  $zmin)     // pt 3
     // outlet region
-    ( $xout  $mrad1  $zmin)     // pt 4
-    (     0  $mrad1  $zmin)     // pt 5
-    (     0  $mrad0  $zmin)     // pt 6
-    ( $xout  $mrad0  $zmin)     // pt 7
+    ( $xout  -$rad1  $zmin)     // pt 4
+    (     0  -$rad1  $zmin)     // pt 5
+    (     0  -$rad0  $zmin)     // pt 6
+    ( $xout  -$rad0  $zmin)     // pt 7
     // bend mid-points
     ( $rad0       0  $zmin)     // pt 8
     ( $rad1       0  $zmin)     // pt 9
@@ -66,13 +64,13 @@ vertices
     (     0   $rad1  $zmax)     // pt 2 + 10
     (  $xin   $rad1  $zmax)     // pt 3 + 10
     // outlet region
-    ( $xout   $mrad1  $zmax)    // pt 4 + 10
-    (     0   $mrad1  $zmax)    // pt 5 + 10
-    (     0   $mrad0  $zmax)    // pt 6 + 10
-    ( $xout   $mrad0  $zmax)    // pt 7 + 10
+    ( $xout  -$rad1  $zmax)     // pt 4 + 10
+    (     0  -$rad1  $zmax)     // pt 5 + 10
+    (     0  -$rad0  $zmax)     // pt 6 + 10
+    ( $xout  -$rad0  $zmax)     // pt 7 + 10
     // bend mid-points
-    ( $rad0        0  $zmax)    // pt 8 + 10
-    ( $rad1        0  $zmax)    // pt 9 + 10
+    ( $rad0       0  $zmax)     // pt 8 + 10
+    ( $rad1       0  $zmax)     // pt 9 + 10
 );
 
 blocks