Synonyms
Artificial; Computational; Free-Space; Nonreflective; Open or Far-Field Boundary Conditions; Sponge Layers
Summary
Absorbing boundaries and layers are used to limit the computational domain in the numerical approximation of partial differential equations in infinite domains, such as wave propagation problems or computational fluid dynamics.
In a typical seismic problem, the wave equation \(\mathcal{L}_{u} = f\) must be solved in the subsurface with data g on the surface; the solution u is sought in the domain D S in magenta in Fig. 1. The domain in blue is a computational layer L C ; their union is the computational domain D C .
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Halpern, L. (2015). Absorbing Boundaries and Layers. In: Engquist, B. (eds) Encyclopedia of Applied and Computational Mathematics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-70529-1_366
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DOI: https://doi.org/10.1007/978-3-540-70529-1_366
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