Learning Forum

[zhou333708124]

I set 2 UDFs in my case

One is "DEFINE_EXECUTE_ON_LOADING" type, this UDF can be auto run and it execute correctly.

The other is "DEFINE_EXECUTE_AT_END" type, this UDF need to be hooked and it cannot execute in calculation process.

I check the "start_coupled.jou" and "fluent.log" written by RockyDEM, and I found Rocky set its own UDF by "/define/user-defined/function-hooks/execute-at-end "exchange_rocky_fluent_coupling_data::rocky_fluent_coupling" "inject_remove_particles::rocky_fluent_coupling" """

This command hooks those two UDFs to execute-at-end, my UDF has been replaced or just not get hooked, so I cannot use UDFs that need hooking in coupling. This command is execute automaticly by Rocky.

As the Rocky coupling start, there are nothing I can do to pause the process or exchange the files, so if there are anyway to hook my UDFs automaticly?

[Jackson Gomes]

Hi Zhou,

Rocky automatically sets its own UDFs in execute-at-end, replacing yours. To work around this:

1. Use a different hook, like DEFINE_ADJUST.
2. Modify start_coupled.jou before execution to add your UDF.
3. Append your UDF to the same hook manually if possible.

[zhou333708124]

 

 

Thanks Jackson.

DEFINE_ADJUST cannot be hooked normally. As you can see, execute-at-end, initialization and adjust are all replaced.

But some of DEFINE_PROFILE UDFs can be executed.

To modify start_coupled.jou or hook my UDF manually have the same problem that I can’t pause the process, the calculation is automaticlly execute by Rocky, and if I change the .jou file the process will be shut down.

If there are any option for user to pause the process and adjust the setting manually?

Best wish for you

 

 

[Jackson Gomes]

Dear Zhou,

Which Rocky version are you using? Also, can you check your .cas file in a text editor like Notepad++ and look for udf/execute-at-end-fcns, udf/init-fcns, or udf/adjust-fcns?

 If Rocky is replacing everything, have you tried running Fluent in interactive mode before starting the coupling?