object in a magnetic field

Hi,

I'm working on a similar problem as yours.
I'm currently making a model on Comsol which calculates how the angular rate of an object in a magnetic field decreases over time.
What I did, I put an object imported from CATIA on a "box" which generate the uniform magnetic field. My simulation is in 3D.
Unfortunalty, Comsol either gives me wrong results (angular rate increases infinitly) or the solution is diverging.

Did you figure out how to solve your problem ?

Here is my email: mariek@my.erau.edu, it will be easier to talk.

Thank your for your help.

Andrea