inlet BC using UDF
 

At the inlet i want to give a boundary condition which is the d(uds 0)/dt. so for this which macro to use?

I have tried DEFINE_INIT and DEFINE_PROFILE.

Both gives me an error during initialization of the solution.

Plz help

Re: inlet BC using UDF
 

I think it is simple:) there many macros in udf that you can use to write you program, you'd better see the help file for details.