Multi-scale methods for wave propagation in heterogeneous media

Details Multi-scale methods for wave propagation in heterogeneous media Multi-scale methods for wave propagation in heterogeneous media

2009-11-13

arxiv.org/abs/0911.2638v1

Mathematics

Numerical Analysis

Scientific paper

Multi-scale wave propagation problems are computationally costly to solve by traditional techniques because the smallest scales must be represented over a domain determined by the largest scales of the problem. We have developed and analyzed new numerical methods for multi-scale wave propagation in the framework of heterogeneous multi-scale method. The numerical methods couples simulations on macro- and micro-scales for problems with rapidly oscillating coefficients. We show that the complexity of the new method is significantly lower than that of traditional techniques with a computational cost that is essentially independent of the micro-scale. A convergence proof is given and numerical results are presented for periodic problems in one, two and three dimensions. The method is also successfully applied to non-periodic problems and for long time integration where dispersive effects occur.

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