Reply To: Poiseuille2D Inflow
is there any particular reason you changed the original line
T distance2Wall = converter.getConversionFactorLength();
T distance2Wall = converter.getLatticeLength(ly0_new/2.);
In any case, in your setup this results in a deformed poiseuille profile giving you the impression of a constant value. Just restore the line to its original version and it will probably work the way you intended it to.