I'm a student doing a FYP. Need to create a UFD file in order to set the required boundary conditions.

Am totally lost abt where to write the UFD. I only know I have to save the UFD as a .c file before interpreting in via solver.

Can anyone be kind enough to tell me which program(s) can I use to write/compile the UDF file?

Many thanks.

you can write udf in a notepad but save it as .c extension. for boundary conditions, ther is a step by step guide in udf manual of fluent documentation. i hope this works for u. Regard Rizwan