[saaghi]

Dear Friends,

Previously I worked on the steady flow between parallel plates with uniform entrance velocity and I got satisfactory results. Since then I have been working on parabolic entrance velocity but I am not sure about the validity of the results.

The following plot is the centerline axial velocity when the mean axial velocity is Um=0.1004708 (which seems alright):



but when I decrease the range of the vertical axis it seems that there is an error which I am not sure if this is an acceptable numerical error or not.
The following is the same plot with smaller range of vertical axis:



As you see this error only shows itself in very small range of vertical axis.