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2001
Conference Paper
Titel
Iterative Grid Refinement for Elastodynamic Finite-Difference Time-Domain Methods
Abstract
In the present paper an approach for iterative grid refinement in Finite-Difference Time-Domain (FDTD) methods on staggered Cartesian grids is presented. It is shown that the developed technique is stable and consistent. The numerical mismatch in the transition zone between refined and non-refined parts of the grid is investigated. It is shown that the mismatch factor can efficiently be reduced by using space-time interpolation of the elastic field components at the transition point. The proposed method allows a problem-oriented grid adaptation for FDTD techniques significantly increasing accuracy relatively low compuational costs.