Ansys Maxwell Simulation - Torque Fluctuating

[Kahraman]

Hello everyone
I simulated the eddy current brake of 2 1000-turn coils with 5 amp excitation in Ansys Maxwell, but the torque fluctuates. How can I overcome this problem?
If you want to see it in more detail, you can download the project from the link.
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(Sorry for any language errors)

 

[Tom.G]

Is the brake disc mechanically vibrating? If so, make it stiffer.

 

[Kahraman]

Is the brake disc mechanically vibrating? If so, make it stiffer.

The disc rotates from its center, I don't think there is anything that could cause vibration.

 

[Tom.G]

Since it's a simulation and really rotating from the center, then it must be a numerical error.

Try smaller time steps (probably the easiest).

Also, the disk diameter may need to be either an odd or even multiple of the grid resolution; depends on whether the software treats Points as vertices or centroids.