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A combined boundary value and transmission problem arising from the calculation of eddy currents: Well-posedness and numerical treatment

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Abstract

The problem of calculating eddy current losses is formulated as a boundary value and transmission problem for a complex Helmholtz equation and Laplace's equation. By deriving an equivalent system of integral equations, we show the existence of a unique solution depending continuously on the data. Furthermore, we propose a numerical method based on decomposing the problem into two boundary value problems, where part of the boundary values have to be determined by a system of linear equations.

Zusammenfassung

Das Problem der Berechnung von Wirbelstromverlusten wird als Randwert- und Übergangsproblem für eine komplexe Helmholtz- und die Laplacegleichung formuliert. Wir führen dieses Problem in ein äquivalentes Integralgleichungssystem über und zeigen die Existenz einer eindeutigen, stetig von den Daten abhängenden Lösung. Weiter schlagen wir eine numerische Lösungsmethode vor, die auf der Dekomposition des Problems in zwei Randwertprobleme beruht, wobei ein Teil der Randwerte durch ein lineares Gleichungssystem zu bestimmen ist.

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Engl, H.W., Lindner, E. A combined boundary value and transmission problem arising from the calculation of eddy currents: Well-posedness and numerical treatment. Z. angew. Math. Phys. 35, 289–307 (1984). https://doi.org/10.1007/BF00944879

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  • DOI: https://doi.org/10.1007/BF00944879

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