Well-Posedness of one-way wave equations and absorbing boundary conditions
Mathematics of Computation
Absorbing boundary conditions for difference approximations to the multi-dimensional wave equation
Mathematics of Computation
A perfectly matched layer for the absorption of electromagnetic waves
Journal of Computational Physics
The Huygens subgridding for the numerical solution of the Maxwell equations
Journal of Computational Physics
Transformation optics based local mesh refinement for solving Maxwell's equations
Journal of Computational Physics
Hi-index | 31.46 |
Mesh refinement is desirable for an advantageous use of the finite-difference time-domain (FDTD) solution method of Maxwell's equations, because higher spatial resolutions, i.e., increased mesh densities, are introduced only in subregions where they are really needed, thus preventing computer resources wasting. However, the introduction of high density meshes in the FDTD method is recognized as a source of troubles as far as stability and accuracy are concerned, a problem which is currently dealt with by recursion, i.e., by nesting meshes with a progressively increasing resolution. Nevertheless, such an approach unavoidably raises again the computational burden. In this paper we propose a nonrecursive three-dimensional (3-D) algorithm that works with straight embedding of fine meshes into coarse ones which have larger space steps, in each direction, by a factor of 5 or more, while maintaining a satisfactory stability and accuracy. The algorithm is tested against known analytical solutions.