PÉRON, Victor; SCHMIDT, Kersten; DURUFLÉ, Marc

doi:10.1137/15M1012116

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PÉRON, Victor
Laboratoire de Mathématiques et de leurs Applications [Pau] [LMAP]
Advanced 3D Numerical Modeling in Geophysics [Magique 3D]

SCHMIDT, Kersten
Institut für Mathematik [Berlin]

DURUFLÉ, Marc
Advanced 3D Numerical Modeling in Geophysics [Magique 3D]
Institut de Mathématiques de Bordeaux [IMB]

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Ce document a été publié dans

SIAM Journal on Applied Mathematics. 2016, vol. 76, n° 3, p. 1031--1052

Society for Industrial and Applied Mathematics

Résumé en anglais

We propose equivalent transmission conditions of order 1 and 2 for thin and highly conducting sheets for the time-harmonic Maxwell's equation in three dimension. The transmission conditions are derived asymptotically for vanishing sheet thickness ε where the skin depth is kept proportional to ε. The condition of order 1 turns out to be the perfect electric conductor boundary condition. The conditions of order 2 appear as generalised Poincaré-Steklov maps between tangential components of the magnetic field and the electric field, and they are of Wentzell type involving second order surface differential operators. Numerical results with finite elements of higher order validate the asymptotic convergence for ε → 0 and the robustness of the equivalent transmission condition of order 2.< Réduire

Mots clés en anglais

time-harmonic Maxwell's equations

Asymptotic expansions

impedance transmission conditions

thin conducting sheets

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Equivalent transmission conditions for the time-harmonic Maxwell equations in 3D for a medium with a highly conductive thin sheet

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