[A.Jalal]

All,

This is a general question regarding compiling and loading UDF into ANSYS Fluent.

Do I have to run a case first without the UDF and get results before going back, compiling the UDF and then re-running the case?

I keep getting "motion history missing" errors. What could this refer to?

I have checked the UDF manual but it only addresses how to create, compile and interpret UDFs.

Any help will be greatly appreciated.

Best regards,

[Bruno Machado]

No, you need to compile the UDF first, hook it to your problem (initial conditions, DEFINE_ADJUST, properties, etc.), initialize it and run.

[A.Jalal]

Bruno,

Thanks for the help. I will check it now and get back to you.