This work studies time-dependent electromagnetic scattering from obstacles whose interaction with the wave is fully determined by a nonlinear boundary condition. In particular, the boundary condition studied in this work enforces a power law type relation between the electric and magnetic fields along the boundary. Based on time-dependent jump relations of classical boundary operators, we derive a nonlinear system of time-dependent boundary integral equations that determines the tangential traces of the scattered electric and magnetic fields. These fields can subsequently be computed at arbitrary points in the exterior domain by evaluating a time-dependent representation formula.<\/p>\n
Fully discrete schemes are obtained by discretizing the nonlinear system of boundary integral equations with Runge\u2013Kutta based convolution quadrature in time and Raviart\u2013Thomas boundary elements in space. Error bounds with explicitly stated convergence rates are proven, under the assumption of sufficient regularity of the exact solution. The error analysis is conducted through novel techniques based on time-discrete transmission problems and the use of a new discrete partial integration inequality. Numerical experiments illustrate the use of the proposed method and provide empirical convergence rates.<\/p>","DOI":"10.1090\/mcom\/3914","type":"journal-article","created":{"date-parts":[[2023,9,27]],"date-time":"2023-09-27T10:34:33Z","timestamp":1695810873000},"page":"1529-1568","source":"Crossref","is-referenced-by-count":2,"title":["Numerical analysis for electromagnetic scattering with nonlinear boundary conditions"],"prefix":"10.1090","volume":"93","author":[{"given":"J\u00f6rg","family":"Nick","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"14","published-online":{"date-parts":[[2023,10,23]]},"reference":[{"issue":"2","key":"1","doi-asserted-by":"publisher","first-page":"159","DOI":"10.1007\/BF02567511","article-title":"Some remarks on the characterization of the space of tangential traces of \ud835\udc3b(\ud835\udc5f\ud835\udc5c\ud835\udc61;\u03a9) and the construction of an extension operator","volume":"89","author":"Alonso, Ana","year":"1996","journal-title":"Manuscripta Math.","ISSN":"https:\/\/id.crossref.org\/issn\/0025-2611","issn-type":"print"},{"issue":"4","key":"2","doi-asserted-by":"publisher","first-page":"643","DOI":"10.1007\/s00211-012-0503-7","article-title":"Numerical solution of exterior Maxwell problems by Galerkin BEM and Runge-Kutta convolution quadrature","volume":"123","author":"Ballani, J.","year":"2013","journal-title":"Numer. 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