[ChesterP]

Hello everybody,

I have meshed each zone as in the User's Guide and applied same Named Selections (for clarity) for the volumes.

In FLUENT I have specified the following for the Dynamic Mesh properties:
- PistonHead = Rigid Body - UDF : **piston-full** ;
- LayeringZoneAbovePiston = Rigid Body - UDF : **piston-limit** ;
- RemeshingZone = Deforming ;

I have enabled Smoothing, Layering and Remeshing.
For the moment I am only considering the movement of the piston (valves are fixed). When I am previewing the mesh motion there are two problems that arise, namely :
- cell and face skewness increase until they reach 1, some degrees after TDC ;
- when the piston head reaches the BDC there is an error concerning negative volume;

Thanks in advance,

Chester