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- W2090717146 abstract "A classical problem in acoustic (and electromagnetic) scattering concerns the evaluation of the Green’s function for the Helmholtz equation subject to impedance boundary conditions on a half-space. The two principal approaches used for representing this Green’s function are the Sommerfeld integral and the (closely related) method of complex images. The former is extremely efficient when the source is at some distance from the half-space boundary, but involves an unwieldy range of integration as the source gets closer and closer. Complex image-based methods, on the other hand, can be quite efficient when the source is close to the boundary, but they do not easily permit the use of the superposition principle since the selection of complex image locations depends on both the source and the target. We have developed a new, hybrid representation which uses a finite number of real images (dependent only on the source location) coupled with a rapidly converging Sommerfeld-like integral. While our method applies in both two and three dimensions, we restrict the detailed analysis and numerical experiments here to the two-dimensional case." @default.
- W2090717146 created "2016-06-24" @default.
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- W2090717146 date "2014-01-01" @default.
- W2090717146 modified "2023-10-18" @default.
- W2090717146 title "On the efficient representation of the half-space impedance Green’s function for the Helmholtz equation" @default.
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- W2090717146 doi "https://doi.org/10.1016/j.wavemoti.2013.04.012" @default.
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