The LBend was set to run for 2 s, but at about 1.95 s the packed region
builds up to the inlet and the simulation diverges. The end time has
been reduced to 1.9 s so that this does not occur.
Patch contributed by Juho Peltola, VTT
The new JohnsonJacksonSchaefferFrictionalStress model is included and
the LBend tutorial case to demonstrate the need for the changes to the
frictional stress models.
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=2058