The eddy current distribution in my device doesn look right. Whats going on?
In 2D planar problems, all parts of the problem are, by default “shorted together at infinity.” If there is a specific connectivity of the regions in your problem, you have to impose that connectivity by the way that you define the problem. This is usually done by defining a parallel-type circuit in which the total current is zero. This circuit property is then applied to all regions that are supposed to be connected together (that is, all the regions over which the current is to be conserved). In addition, always make sure that the mesh has been defined to be adequately fine in blocks in which a small skin depth is expected. This can be done either by defining a small mesh size for entire regions that are subject to eddy currents, or by defining a fine mesh density on the lines or arcs that form the surface of the region. For small skin depth problems, defining a fine surface mesh is the more efficient way to go.
