Discussion Forum

Dear COMSOL experts,

for our research we would need to simulate moving metallic leaves of finite extent inside a magnetic field generated by multiple coils carrying a DC current (i.e. no changing fields). We are interested in the influence of the movement on the magnetic field as well as in the forces on the metallic leaves, which includes eddy-currents induced in the leaves and probably in the coils. The velocity of the leaves would be rather slow, so a quasi-static calculation would hopefully be accurate enough.

While it is certainly possible to model this scenario in the static case (where the leaves are not moving) using the COMSOL AC/DC Modul, I am not sure if simulating the moving metallic leaves would be possible.

Through reading online COMSOL documentation, I got the impression that including the velocity into the Lorentz / Maxwell equations is only possible in COMSOL under fairly restrictive conditions, for example it appears to be possible if the object moving is infinite in length alongside the direction of movement (infinite rail) or if you are looking at axis-symmetric object rotating around its axis of symmetry.

However, I have found no possibility so far of modelling a scenario where you have a moving conductive projectile inside a magnetic field.

So my questions are:

a) Can above described scenario be modelled in COMSOL with sufficient accuracy?
b) If yes, is it possible to feed COMSOL with a trajectory for the single metallic leaves and simulate the magnetic fields and forces over time?

Any help is gladly appreciated,

Tristan