Efficient Treatment of 3d Time-Domain Electromagnetic Scattering Scenes by Disjointing Sub-Domains and With Consistent Approximations

Aim of this paper is to present an efficient scheme of domain decomposition to study, in the time domain, multiple scattering by separated obstacles and sources with any composition and geometry, in an homogeneous media.A method of decomposition into disjointed sub-domains is proposed, resting onto an homogeneous and adaptable approximation of coupling terms and leading to a natural parallelized and hybrid numerical schema.It permits to significantly lower the cumulative error of dissipation and/or dispersion introduced by classical scheme.It also leads to a suitable answer for a wide class of problems involving large scattering scenes limiting for classical time domain methods.Numerical examples are given to illustrate it.