Set the min value to 1e-8.

tutorials/Xoodles/pitzDaily/0/k

@@ -20,32 +20,32 @@ internalField   uniform 2e-05;
 
 boundaryField
 {
-    inlet           
+    inlet
     {
         type            fixedValue;
         value           uniform 2e-05;
     }
 
-    outlet          
+    outlet
     {
         type            inletOutlet;
         inletValue      uniform 2e-05;
         value           uniform 2e-05;
     }
 
-    upperWall       
+    upperWall
     {
         type            fixedValue;
         value           uniform 1e-8;
     }
 
-    lowerWall       
+    lowerWall
     {
         type            fixedValue;
         value           uniform 1e-8;
     }
 
-    frontAndBack    
+    frontAndBack
     {
         type            empty;
     }

tutorials/Xoodles/pitzDaily3D/0/k

@@ -16,36 +16,36 @@ FoamFile
 
 dimensions      [0 2 -2 0 0 0 0];
 
-internalField   uniform 0;
+internalField   uniform 2e-05;
 
 boundaryField
 {
-    inlet           
+    inlet
     {
         type            fixedValue;
         value           uniform 2e-05;
     }
 
-    outlet          
+    outlet
     {
         type            inletOutlet;
         inletValue      uniform 2e-05;
         value           uniform 2e-05;
     }
 
-    upperWall       
+    upperWall
     {
         type            fixedValue;
-        value           uniform 0;
+        value           uniform 1e-8;
     }
 
-    lowerWall       
+    lowerWall
     {
         type            fixedValue;
-        value           uniform 0;
+        value           uniform 1e-8;
     }
 
-    frontAndBack    
+    frontAndBack
     {
         type            cyclic;
     }