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- W2117480412 abstract "We consider the approximation of some highly oscillatory weakly singular surface integrals, arising from boundary integral methods with smooth global basis functions for solving problems of high frequency acoustic scattering by three-dimensional convex obstacles, described globally in spherical coordinates. As the frequency of the incident wave increases, the performance of standard quadrature schemes deteriorates. Naive application of asymptotic schemes also fails due to the weak singularity. We propose here a new scheme based on a combination of an asymptotic approach and exact treatment of singularities in an appropriate coordinate system. For the case of a spherical scatterer we demonstrate via error analysis and numerical results that, provided the observation point is sufficiently far from the shadow boundary, a high level of accuracy can be achieved with a minimal computational cost." @default.
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- W2117480412 date "2007-07-01" @default.
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- W2117480412 title "Efficient evaluation of highly oscillatory acoustic scattering surface integrals" @default.
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- W2117480412 doi "https://doi.org/10.1016/j.cam.2006.03.029" @default.
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