I need to have a physics model in order to create the simulation.

Do you have the model in mind?

I found some model at http://epubl.ltu.se/1653-0187/2007/086/LTU-PB-EX-07086-SE.pdf
Does the model in that pdf fit with your need?
You also need to provide values for all the parameters so that the simulation can fit with the need of your system.