Numerical interaction of boundary waves with perfectly matched layers in two space dimensional elastic waveguides |
| |
Authors: | Kenneth Duru Gunilla Kreiss |
| |
Institution: | 1. Division of Scientific Computing, Uppsala University, Sweden;2. Department of Geophysics, Stanford University, Stanford, CA, United States |
| |
Abstract: | Perfectly matched layers (PMLs) are now a standard approach to simulate the absorption of waves in open domains. Wave propagation in elastic waveguides has the possibility to support back-propagating modes (propagating modes with oppositely directed group and phase velocities) with long wavelengths. Back-propagating modes can lead to temporally growing solutions in the PML. In this paper, we demonstrate that back-propagating modes in a two space dimensional isotropic elastic waveguide are not harmful to a discrete and finite width PML. Analysis and numerical experiments confirm the accuracy and stability of the PML. |
| |
Keywords: | Guided waves Perfectly matched layer Group velocity Stability SBP-SAT High order accuracy |
本文献已被 ScienceDirect 等数据库收录! |