1. May 15, 2009 #1

   tonisantos

   

   Hello everyone,
   im a 5th year student and im doing my final project which consists on analyzing the scavenging process of a 2 stroke opposed piston engine, but im having a hard time creating the UDF for the dynamic meshing thing.
   Could anyone please help me?

    

   tonisantos, May 15, 2009
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3. May 15, 2009 #2

   minger

   

   Science Advisor

   OK, first, what part of the mesh needs to move? Why do you not just apply a time-dependant boundary condition?
   
   Also, what is a UDF file? I assume something related to the grid motion.

    

   minger, May 15, 2009
4. May 18, 2009 #3

   tonisantos

   

   UDF (user defined function) is required to get dynamic meshes working...
   I need to move 2 piston heads inside the same cilinder in oposite directions

    

   tonisantos, May 18, 2009
5. May 18, 2009 #4

   minger

   

   Science Advisor

   Right, we use CFX here, so I'm not familiar with these UDFs.

    

   minger, May 18, 2009
6. Nov 14, 2011 #5

   darrencam

   

   Hello, I am also simulating a two stroke opposed piston engine. Has anyone managed to program a UDF for the dynamic mesh please? Thanks.
   
   Darren

    

   darrencam, Nov 14, 2011

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