Hi, I am wondering does anyone know if it is possible to combine an unsteady velocity udf with a udf for parabolic velocity, so that i can have an unsteady flow with a parabolic shape at the inlet for every time step? At the moment i just have an unsteady profile and a parabolic profile but cannot combine them. Thanks for any help.

Then instead of using unsteady UDF u can write the profile with respect to various time seconds and read that UDF for parabolic profile... this may help u....

With regards, Vijay