A hybrid absorbing boundary condition with AWWEs for finite-difference modeling

摘要

In this paper, we develop the absorbing boundary condition (ABC) combined with wide-angle wave equations based on the ideas of arbitrarily wide-angle wave equations (AWWEs) (Guddati, 2006) and the hybrid ABC (Liu and Sen, 2010). We introduce the finite difference scheme of AWWEs for the hybrid ABC. Numerical modeling results show significant absorption of our ABC which can achieve good results with fewer boundary grids.