Technical Report 2011-016

Implementation of a Collocated Boundary Element Method for Acoustic Wave Propagation in Multilayered Fluid Media

Elena Sundkvist and Elisabeth Larsson

June 2011

The numerical solution of the Helmholtz equation with nonlocal radiation boundary conditions is considered. We model sound wave propagation in a multilayered piecewise homogeneous medium. A fourth-order accurate collocated, boundary element method is used, where the solution inside the domain is computed through a representation integral. The method is shown to have the expected fourth-order convergence and is also compared with a fourth-order accurate finite difference method.

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