Hello, I'm a new user. How can I define varying X,Y components of flow direction, along a 2-d Pressure Inlet B.C.? Should I use a UDF Define_Profile Macro? If so, how can it be assigned to the "Direction Specification Method"? i.e. DEFINE_PROFILE (???, t, i). or Should I use a "Read --> Profile" method and create the correct components in the profile file? If so, what type of "Write --> Profile" can be used, that will write the components of flow direction? Thanks.

You can do it inside fluent itself. Look in the manuals