UDF for an In-Cylinder case
 

Hello everybody. I'm trying to make the simulation of an In-Cylinder case (2D) so I need to write a UDF to define the valves and piston's motion. This is the first time I use an UDF in Fluent so I'm looking for an example of a UDF defined for an in-cylinder case.

Thank you for your help.

Sincerely.

Anthony