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Solving acoustic scattering problems by the isogeometric boundary element method (2306.11324v1)

Published 20 Jun 2023 in math.NA and cs.NA

Abstract: We solve acoustic scattering problems by means of the isogeometric boundary integral equation method. In order to avoid spurious modes, we apply the combined field integral equations for either sound-hard scatterers or sound-soft scatterers. These integral equations are discretized by Galerkin's method, which especially enables the mathematically correct regularization of the hypersingular integral operator. In order to circumvent densely populated system matrices, we employ the isogeometric fast multipole method. The result is an algorithm that scales essentially linear in the number of boundary elements. Numerical experiments are performed which show the feasibility and the performance of the approach.

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