Seminars on Numerical Algorithms, Analyses, and Applications:Adaptive PML/TBC finite element methods for scattering problems in unbounded domain

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:吕俊良(吉林大学)
:2022-10-25 10:00
:腾讯会议ID:529-210-378(无密码)

报告人:吕俊良(吉林大学)

时  间:1025日上午10:00

地  点:腾讯会议ID529-210-378(无密码)

内容摘要:

In this talk, I will give some recent work on scattering problems, including acoustic scattering by obstacles, electromagnetic scattering by grating structures, and elastic scattering by periodic materials. One of main difficulties for solving these problems with finite element methods is the unboundedness of physical domains. Two effective strategies to truncate these unbounded domains into bounded computable domains are introduced. One is the transparent boundary condition (TBC) approach, the other is the perfectly matched layer (PML) technique. Moreover, Adaptive mesh refinement methods based on the a posteriori estimates are considered to deal with complex problem geometries and potential discontinuous material parameters. Some numerical results will be presented to illustrate the competitive behavior of the proposed method.

人简介:

吕俊良,吉林大学数学学院,教授,博导。2009年博士毕业于吉林大学数学学院,导师李永海教授。2011-2013年于浙江大学做博士后研究,合作导师包刚教授。2015-2016年美国普渡大学访问学者,合作导师李培军教授。研究兴趣包括散射问题的自适应有限元方法及其理论分析,反散射问题的数值算法,辐射热传导问题的数值方法,有限体积元法的基础理论等。研究成果发表在SIAM J. Numer. Anal.Math. Comput.J.Sci. Comput.以及IMA J. Numer. Anal.等杂志上。承担国家自然科学基金青年基金及面上项目、国防科工局核科学基础科研挑战专题项目等。现任美国数学会数学评论员、中国仿真学会仿真算法专委员会委员、吉林省数学会第十一届理事会理事。

 

联系人:陈竑焘