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Nested multigrid methods for the fast numerical computation of 3D magnetic fields

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3 Author(s)
Schinnerl, M. ; Dept. of Meas. Technol., Linz Univ., Austria ; Schoberl, J. ; Kaltenbacher, M.

This paper deals with the numerical solution of static as well as transient 3D magnetic field problems. 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 nested geometrical multigrid solver (MG) is presented, which reduces the solution time considerably. Numerical simulations demonstrate the superiority of the proposed method versus conventional solving strategies

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Magnetics, IEEE Transactions on  (Volume:36 ,  Issue: 4 )