Discrete constitutive equations in A-χ geometric eddy-current formulation

Using a geometric formulation for eddy currents, we present a geometric approach to constructing approximations of the discrete magnetic and Ohm´s constitutive matrices. In the case of Ohm´s matrix, we also show how to make it symmetric. We compared the impact on the solution of the proposed Ohm´s matrices, and an iterative technique to obtain a consistent right-hand-side term in the final system is described.