[soliddesign]

Hi everyone,

I'm fairly new to using Ansys software especially fluent and i have to simulate a combustion process in a piston and find the pressure against crank angle graphs. I have gotten to the point where i have the dynamic mesh set up and moving.

i have been trying to run the simulation with no combustion just the gases inside to get the pressure curve as the piston expands and compresses but i keep getting constant pressure regardless of the piston movement.

Is there anyone who may be able to help me understand where the problem is?

Thanks