Learning Forum

[yk2359]

Hello,

Example FSI case:

• Flow time (End time) 1 sec


• Time step size 0.1 sec


• System coupling iterations 10


• Fluent iterations 5

I am looking extract variables at the end of every 1 system coupling iteration (at the end of every 5 fluent iterations) using DEFINE_ADJUST UDF. Now I understand that adjust macro runs for every 1 fluent iteration, but is there any way to execute it only at every 5th? Or any other way? Please suggest.

 

Thank you,

YK

[DrAmine]

Yes you can think about executing the content of the DEFINE_ADJUST whenever N_ITER%5 ==0 

[yk2359]

Thanks for the response. As N_ITER is a solver macro I believe I need not define it again.

But while writing a parallel UDF, does if N_ITER%5 ==0{code} condition come under RP_NODE? !RP_HOST?

[DrAmine]

I guess it will be available everywhere and passed to the node (so I generally put everything on nodes as host does not contain any mesh data) so make your UDF parallel as you have learned to do.

[seeta gunti]

You can hook the UDF for every 5 iterations and unhook the UDF after 1 iteration through calculation activities using TUI commands.

Not sure if it works or not. Just an idea!

Regards,

Seeta