Hello!

I want to know if it's possible to launch a DEFINE_PROPERTY only at the first iteration of a time step? TTTTThank you

try to define a macro that execute on demand your DEFINe_PROPERTY udf!. hook this macro in solve/execute command GUI menu. I hope it's helpful regards Adriano

Hello Adriano,

Thank you for yourt help. But can you help me again please? Because i'm not familiar with the execute command. I interpret my UDF function. I put my udf viscosity in material panel, and after how can I use the execute command. I read the user guide, but i don't really understand how it's work. If you have the time to help me, I'll be greatful...

Thank you again

Macros record your moviments in GUI pannel so, after starting to record them (/execute command/macro/start) make as u're appling the condition for the first time(i.e.: click on define/udf/execute on demand --->hook your udf --->execute it). After stop your macro. and set it as a running command on execute window (each time step for example). run your simulation.

It may run.I hope. Regards A