In the paper, the finite-element method and the boundary-element method are combined in cases of axisymmetric geometries. The basic equations are expressed in terms of the magnetic vector potential. The finite-element formulation is employed for the general diffusion equation in a bounded domain, while, in the exterior region, the boundary element method is developed for Laplace's equation from a single-layer potential formulation. The hybrid model is applied to eddy-current calculations for the case of an induction heating system. The method is compared with experimental results.
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Pichon et al. (1989) studied this question.