dimentionless velocity expression POST CFD
 

Hello,

I analyse rotatory flow in a tank (R=100mm). I was asked to present velocity change along the radius as a dimensionless velocity (non-dimensional velocity). I plot velocities at 4 mm above the bottom.

I struggle to write the expression in post cfd to plot the expression in the program.
Can anyone provide any step by step instruction?
Also I wonder if the dimensionless velocity will be valid along the radius, after all it is a near-wall phenomena.

Big thanks!