Nearly perfectly matched layer boundary condition for second-order anisotropic acoustic wave equations
Ozsoy, C., Chen, J., Zhang, Q., Zhao, J. and Metin, G., 2013. Nearly perfectly matched layer boundary condition for second-order anisotropic acoustic wave equations. Journal of Seismic Exploration, 22: 489-500. During the numerical simulation of seismic wave propagation, the artificial layers are used at the computational boundaries to truncate the unbounded media which cause the unwanted reflections. In this study, the validity of the nearly perfectly matched layer as an absorbing layer, which has proven to be very efficient for first-order acoustic and elastic wave equations in stress and velocity, is detailed investigated to suppress those spurious reflections for second-order anisotropic acoustic wave equations. The numerical test results show that the nearly perfectly matched layer has a significant performance to absorb the outgoing waves at the model edges.
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