ENH: Tutorial update

tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/constant/porous/polyMesh/blockMeshDict

@@ -18,20 +18,20 @@ convertToMeters 0.05;
 
 vertices
 (
-    (-2 4 4)     // 0
-    (12 4 4)     // 1
-    (12 6 4)     // 2
-    (-2 6 4)     // 3
+    (-2 2 6)     // 0
+    (12 2 6)     // 1
+    (12 8 6)     // 2
+    (-2 8 6)     // 3
 
-    (-2 4 6)     // 4
-    (12 4 6)     // 5
-    (12 6 6)     // 6
-    (-2 6 6)     // 7
+    (-2 2 7)     // 4
+    (12 2 7)     // 5
+    (12 8 7)     // 6
+    (-2 8 7)     // 7
 );
 
 blocks
 (
-    hex (0 1 2 3 4 5 6 7) (40 15 15) simpleGrading (1 1 1)
+    hex (0 1 2 3 4 5 6 7) (40 30 30) simpleGrading (1 1 1)
 );
 
 edges