ENH: Tutorial update

tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/system/air/fvOptions

@@ -21,17 +21,43 @@ airToporous
     active          on;
     selectionMode   mapRegion;
     interpolationMethod cellVolumeWeight;
-    nbrModelName    porousToair;
     nbrRegionName   porous;
     master          false;
 
     constantHeatTransferCoeffs
     {
+        nbrModelName    porousToair;
         fieldNames      (h);
         semiImplicit    no;
     }
 }
 
+porosityBlockage
+{
+    type            interRegionExplicitPorositySource;
+    active          on;
+    selectionMode   mapRegion;
+    interpolationMethod cellVolumeWeight;
+    nbrRegionName   porous;
+
+    interRegionExplicitPorositySourceCoeffs
+    {
+        type            DarcyForchheimer;
+
+        DarcyForchheimerCoeffs
+        {
+            d   d [0 -2 0 0 0] (10 -1000 -1000);
+            f   f [0 -1 0 0 0] (0 0 0);
+
+            coordinateSystem
+            {
+                e1  (0 1 0);
+                e2  (0 0 1);
+            }
+        }
+    }
+}
+
 MRF1
 {
     type            MRFSource;

tutorials/heatTransfer/chtMultiRegionSimpleFoam/heatExchanger/system/porous/fvOptions

@@ -21,12 +21,12 @@ porousToair
     active          on;
     selectionMode   mapRegion;
     interpolationMethod cellVolumeWeight;
-    nbrModelName    airToporous;
     nbrRegionName   air;
     master          true;
 
     constantHeatTransferCoeffs
     {
+        nbrModelName    airToporous;
         fieldNames      (h);
         semiImplicit    no;
     }