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Computation of High Frequency Waves in Unbounded Domain: Perfectly Matched Layer and Source Transfer

   

 Professor Zhi-Ming Chen (陈志明 研究员)
The Institute of Computational Mathematics and Scientific/Engineering Computing, CAS

Abstract: The talk considers numerical techniques for solving high frequency Helmholtz equations in unbounded domain. We first introduce several key ideas which played important role in solving the Helmholtz problem in unbounded domain including the radiation condition, absorbing boundary condition, and perfectly matched layer. The focus will be a recently introduced source transfer domain decomposition method (STDDM) whose optimal complexity is proved in the case of constant wave number based on the convergence theory of PML method. Our numerical experiments show that STDDM can be used as an efficient preconditioner for Helmholtz equations with heterogeneous wave numbers.

报告人简介:  陈志明, 研究员、博士生导师。1986年毕业于南京大学数学系, 1992年在德国Augsburg大学获博士学位。1997年10月被聘任为中国科学院数学研究所研究员。现任计算数学与科学工程计算研究所所长、科学与工程计算国家重点实验室主任, 国家973项目“高性能科学计算研究”首席科学家。主要研究领域为数值分析与科学计算, 在非线性偏微分方程的自适应有限元方法、非均匀多孔介质流动问题的多尺度计算方法等方面的研究中, 取得一系列重要成果。2000年入选中国科学院"百人计划", 2000年获国家杰出青年基金, 2001年获冯康科学计算奖, 2003年获中国科学院杰出青年荣誉称号, 2006年获中国青年科技奖。2006年在西班牙举行的国际数学家大会上做45分钟邀请报告。现兼任《高等学校计算数学学报》(中、英文版) 主编, 美国"Mathematics of Computation", "SIAM Journal on Numerical Analysis", 英国"European Journal on Applied Mathematics", 《中国科学》、"Journal of Computational Mathematics"等国内外学术刊物的编委。中国计算数学学会副理事长。

Date&Time: September 9, 2013 (Monday), 15:30-16:30
Location: 606 Conference Room, No.3 Heqing Road, Haidian District



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