[Getdp] computation of the eddy currents: power dissipation

[Frederic Trillaud]

Hi,

I have done a magnetic computation involving Eddy currents. I would like
to compute the power dissipated by the Eddy current in the structure
integrating:
sigma*(d A/d t)^2 over the entire geometry, how can I implement this
integral in the post-operation of the computation?, I actually do not
know how to get the temporal derivative of the potential vector A.

Best,

Frederic