Multi-scale methods for wave propagation in heterogeneous media
Bjorn E. Engquist, Henrik Holst, Olof Runborg · Communications in Mathematical Sciences · 2011
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 couple 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.