Find change in volume through motion simulation

[MattThePirate]

Hi all.

I'm using NX8.

I have a working Wankel engine in motion sim that I am trying to find the change in its 'cylinder' volume per crank angle. Is there any way of generating a graph of this?

 

[MattThePirate]

It would be possible to calculate the volume from knowing the cross-sectional area of the combustion chamber at each degree, but I am unsure of how to do this...