patching velocity profile to the inlet face of domain
 

Hi everyone!!! i want to patch a velocity profile to the inlet of the domain for achieving a boundary layer of thickness 50mm near my cavity. As the flow has to be supersonic, i've given the boundary condition as pressure_inlet and pressure_outlet. i've no idea how to patch a velocity profile in that domain. i tried to give pressure profile but m' nt gettng a good boundary layer.i need assistance in this regard.

thank you

use a udf to create the profile and use it