On the Lorenz gauge
Although edge elements satisfactorily solve the eddy current problem, formulations allowing the use of standard node-based elements, are still looked for. But "well-posed" formulations have been elusive up to now. We propose one, based on a Particular gauge, div(sigma alpha) = -sigma(2) mu upsilon, close to the "Lorenz gauge" of several recent publications, but not identical if one does not assume a piecewise uniform conductivity.
gauge edge elements eddy currents