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Modeling Scattering from Rough Poroelastic Surfaces Using COMSOL Multiphysics®

A. Bonomo[1], M. Isakson[1]
[1]Applied Research Laboratories, The University of Texas at Austin, Austin, TX, USA

Published in 2013

COMSOL Multiphysics® is used to address the problem of acoustic scattering from one-dimensional rough poroelastic surfaces. The poroelastic sediment is modeled following the Biot-Stoll formulation. The rough surfaces are generated using a modified power law spectrum. Both monostatic and bistatic scattering strengths are calculated. These results are compared with more conventional scattering models such as perturbation theory and the small-slope approximation. The finite element method is found to be a useful way to assess the validity of these scattering models.

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