ENH: motorBike tutorial : added streamlines

tutorials/incompressible/simpleFoam/motorBike/system/controlDict

@@ -46,4 +46,60 @@ timePrecision   6;
 
 runTimeModifiable true;
 
+
+functions
+{
+    // Make sure all fields for functionObjects are loaded. Prevents any
+    // problems running with execFlowFunctionObjects.
+    readFields
+    {
+        // Where to load it from (if not already in solver)
+        functionObjectLibs ("libfieldFunctionObjects.so");
+
+        type            readFields;
+        fields          (p U k);
+    }
+
+    streamLines
+    {
+        type            streamLine;
+
+        // Output every
+        outputControl   outputTime;
+        // outputInterval 10;
+
+        setFormat       vtk; //gnuplot; //xmgr; //raw; //jplot;
+
+        // Velocity field to use for tracking.
+        U U;
+
+        // Tracked forwards (+U) or backwards (-U)
+        trackForward    true;
+
+        // Names of fields to sample. Should contain above velocity field!
+        fields (p U k);
+
+        // Cells particles can travel before being removed
+        lifeTime        1000;
+
+        // Cloud name to use
+        cloudName       particleTracks;
+
+        // Seeding method. See the sampleSets in sampleDict.
+        seedSampleSet   uniform;  //cloud;//triSurfaceMeshPointSet;
+
+        uniformCoeffs
+        {
+            type        uniform;
+            axis        x;  //distance;
+
+            // Note: tracks slightly offset so as not to be on a face
+            start       (-1.001 1E-7 0.0011);
+            end         (-1.001 1E-7 1.0011);
+            nPoints     20;
+        }
+    }
+}
+
+
 // ************************************************************************* //