Rob
Forum Moderator

We're not sure why the Expression isn't working, but a UDF DEFINE_PROFILE should be fine. 

The profile must return a positive value, and the "y" position is against the inlet location in the CFD model. Not sure if Aitor is on the new Forum, but we tended to correct their replies on the very rare occasion there was anything missing: our goal is to moderate rather than answer everything but Community is still quite young.