move mean velocity setting into scale file

but it is ignored so far

openfoam/run/flowAroundCylinder/scale

-N 1;
+N 6;
+ubar 20;

openfoam/run/flowAroundCylinder/system/codeDict

@@ -18,13 +18,16 @@ FoamFile
 // Note that you must adjust y0 with respect to the origin of
 // you coordinate system.
 
+#include ../scale
+
 parabolicChannelInlet
 {
     code
     #{
         auto y0 = -0.2;      // Reference coodinate, lower wall
-        auto vmean = 0.2;   // Mean velocity
-        //auto vmean = 1;   // Mean velocity
+        // auto vmean = 0.2;   // Mean velocity with Re_d = 20
+        // auto vmean = 1;   // Mean velocity with Re_d = 100
+	auto vmean = $ubar;
 
         Foam::Field<double> y = patch().Cf().component(vector::Y) - y0;
         operator ==