I have a fortran program to put into fluent, the best way I see thus far is as a udf.

My reading of the manual has only given me instruction for a udf programmed in C... further reading however tells me its possible to be done with a fortran code, but no "how to".

Can anyone enlighten me or point to some useful info?

There is documentation - it just it a little hard to find. You'll need to use the TUI-based compilation/loading procedure documented in Sections 8.3 and 8.4 of the UDF manual. There's a fortran example in Section 8.4. Doing this is does require some multi-language programming (which can be a real pain the neck when things don't work - name mangling is loads of fun, as is the whole array thing), but as long as you have the right compilers it shouldn't be too bad.

Good luck.

Jason

I forgot to add in my post that if you get it to work, it would be great if you added to the Fluent FAQ section on this - it is a common misconception that UDF's are C only (that is what I was originally told).

Jason