error in using UDF for specifying drag coefficient
 

i am getting an error: Error: Set_Property: null user-defined-function name Error Object: ()

while setting the UDF(interpreted) for specifying the drag coefficient in Eulerian multiphase model using the macro DEFINE_EXCHANGE_PROPERTY.

Re: error in using UDF for specifying drag coeffic
 

Have you defined a name (the first argument of the macro) for your UDF?

DEFINE_EXCHANGE_PROPERTY (name, c, mixture_thread, second_column_phase_index, first_column_phase_index)

Good luck,

Ale

Re: error in using UDF for specifying drag coeffic
 

I had the same error using interpreted UDF. I "solved" it doing this way:

- Start FLUENT and load the mesh file, then the UDF (Define -> User Defined -> Functions -> Interpreted).

- Set up the case. When you choose your drag factor, you'll obtain the error. Ignore it.

- Save the case file and exit FLUENT.

- Open FLUENT again and load the case file. FLUENT automatically compiles the UDF.

- Set your drag factor again. Now you shouldn't see the error message.

Hi :)

ap

Re: error in using UDF for specifying drag coeffic
 

Thank you for your reply. I have defined a name for my UDF as the first argument to the DEFINE macro.

Re: error in using UDF for specifying drag coeffic
 

Hi ap, Thnak you for your reply. It indeed worked :) thanks a lot.