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• W3165340197 abstract "We develop a stable finite difference method for the elastic wave equations in bounded media, where the material properties can be discontinuous at curved interfaces. The governing equations are discretized in second order form by a fourth or sixth order accurate summation-by-parts operator. The mesh size is determined by the velocity structure of the material, resulting in nonconforming grid interfaces with hanging nodes. We use order-preserving interpolation and the ghost point technique to couple adjacent mesh blocks in an energy-conserving manner, which is supported by a fully discrete stability analysis. In numerical experiments, we demonstrate that the convergence rate is optimal, and is the same as when a globally uniform mesh is used in a single domain. In addition, with a predictor-corrector time integration method, we obtain time stepping stability with stepsize almost the same as given by the usual Courant Friedrichs Lewy condition." @default.
• W3165340197 created "2021-06-07" @default.
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• W3165340197 date "2021-05-24" @default.
• W3165340197 modified "2023-09-23" @default.
• W3165340197 title "A high order finite difference method for the elastic wave equations in bounded domains with nonconforming interfaces." @default.
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• W3165340197 hasPublicationYear "2021" @default.
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