Sweeping Preconditioners for Elastic Wave Propagation with Spectral Element Methods
نویسندگان
چکیده
We present a parallel preconditioning method for the iterative solution of the time-harmonic elastic wave equation which makes use of higher-order spectral elements to reduce pollution error. In particular, the method leverages perfectly matched layer boundary conditions to efficiently approximate the Schur complement matrices of a block LDL factorization. Both sequential and parallel versions of the algorithm are discussed and results for large-scale problems from exploration geophysics are presented. Mathematics Subject Classification. 65F08, 65N22, 65N80. Received August 3, 2013. Published online February 20, 2014.
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تاریخ انتشار 2014