This paper deals with the numerical solution of a two-dimensional (2-D) magnetostatic field problem. Thereby, a finite element method (FEM) with the magnetic vector potential as field variable and a discretization with edge elements is used. For the efficient solution of the obtained matrix equation system, a geometric multigrid solver (MG) is presented which reduces the number of iterations considerably.
be used to simulate 3-D structures.
The simulations considered cyclic removal of edgeelements based on their exposed surface, i.e. reactive edge length. An arbitrary probability of removal ( P 1 ) is assigned to a single exposed edge per