Xiao Bo Tian et al 2008 J. Geophys. Eng. 5 203 doi:10.1088/1742-2132/5/2/007
Xiao Bo Tian1, Ik Bum Kang2, Geun Young Kim2 and Hong Shuang Zhang1
Show affiliationsThe computational domain is artificially designed in the numerical simulation of elastic waves propagating in unbounded media. As a result, boundary reflections arise from the edges of such truncated models. Although many complex schemes have been developed to solve this problem, the absorbing boundary technique of Cerjan et al (1985 Geophysics 50 705–8), as the simplest, is still widely used, especially for the pseudospectral method. To improve the efficiency of suppressing such boundary reflections in the simple technique, we apply damping to the movement velocity of nodes in a narrow strip along the edges. Several modelling results demonstrate its greater effectiveness than previous treatments which apply the damping to the displacement or both displacement and movement velocity of nodes.
Issue 2 (June 2008)
Received 26 October 2007, accepted for publication 21 April 2008
Published 20 May 2008
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