A numerical tour of wave propagation |
The sponge ABC was proposed by Cerjan et al. (1985). The principle is very simple: attenuating the refections exponentially in the extended artificial boundary (Figure 8) area by multiplying a factor less than 1. Commonly, we use the factor
(21) |
extbndr
Figure 8. A schematic diagram of extended artificial boundary area. is the original model zone, which is extended to be with artificial boundary. In the extended bounary area, the attenuation coeffcient ; In the model zone , , . |
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A numerical tour of wave propagation |