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Accurate and efficient algorithms for frequency domain scattering from a thin wire

Davies, P.J. and Duncan, D.B. and Funken, S.A. (2001) Accurate and efficient algorithms for frequency domain scattering from a thin wire. Journal of Computational Physics, 168 (1). pp. 155-183. ISSN 0021-9991

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Abstract

This paper contains a systematic study of numerical approximations for solving the exact kernel form of Pocklington's integro-differential equation for the current induced on a thin wire by an incident time-harmonic electromagnetic field. We consider various Galerkin (h, p, hp, and adaptive h) and collocation schemes and show that a sensible hp refinement strategy provides a very efficient way to solve the problem. We also describe how the kernel (itself a difficult singular integral) can be evaluated reliably and efficiently.