Abstract
The problem of simulating the scattering of a plane electromagnetic wave by a perfectly conducting obstacle in 3D is considered. The computational domain is represented by an unstructured assembly of linear tetrahedral elements and an edge based representation of the mesh is adopted. Maxwell's curl equations are expressed in conservation form and are discretized using a Galerkin finite element approximation in space and an explicit forward difference in time. The physical flux function is replaced by a numerical Lax-Wendroff flux function along each edge of the mesh. The numerical performance of the proposed approach is demonstrated by simulating scattering by a sphere and by a 3D cylindrical cavity. (Author)
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