tutorials: Moved the functions entry from controlDict into a functions file

tutorials/incompressibleFluid/T3A/system/functions

@@ -0,0 +1,39 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     | Website:  https://openfoam.org
+    \\  /    A nd           | Version:  dev
+     \\/     M anipulation  |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      functions;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#includeFunc wallShearStress
+
+#includeFunc graphUniform
+(
+    name=wallShearStressGraph,
+    start=(0.04075 0.00075 0),
+    end=(3.04 0.00075 0),
+    nPoints=100,
+    axis=x,
+    wallShearStress
+)
+
+#includeFunc graphUniform
+(
+    name=kGraph,
+    start=(0.04075 0.05 0),
+    end=(3.04 0.05 0),
+    nPoints=100,
+    axis=x,
+    k
+)
+
+// ************************************************************************* //