Speaker:陈志明研究员
中科院计算数学研究所
Time:3:00-4:00PM, Oct 30, 2017
Venue:本部览秀楼205
Abstract: The talk considers numerical techniques for solving high frequencyHelmholtz equations in unbounded domain. We first introduce several key ideaswhich played important role in solving the Helmholtz problem in unboundeddomain including the radiation condition, absorbing boundary condition, andperfectly matched layer. The focus will be a recently introduced sourcetransfer domain decomposition method (STDDM) whose optimal complexity is provedin the case of constant wave number based on the convergence theory of PMLmethod. Our numerical experiments show that STDDM can be used as an efficientpreconditioner for Helmholtz equations with heterogeneous wave numbers.