講演会のお知らせ

【日時】2015年03月24日 10時30分～ 12時00分

【会場】室蘭工業大学電気電子系セミナー室Ａ （Ａ３２２）

【住所】室蘭市水元町２７−１

【題目】Discontinuous Galerkin Trefftz Finite Element Method

【講師】Fritz Kretzschmar 氏（Technical University of Darmstadt）

【お問合せ】川口秀樹　(室蘭工業大学しくみ情報系領域)

E-mail: kawa@mmm.muroran-it.ac.jp

【講演要旨】

A novel type of Discontinuous Galerkin Finite Element Method for wave propagation problems is presented in this talk. The method employs space?time Trefftz-type basis functions that satisfy the underlying partial differential equations exactly in an element?wise fashion.  A suitable choice of Trefftz basis functions are plane waves traveling in various directions that are expressed as space-time polynomials of arbitrarily high order p. Methods implying such basis sets can exhibit spectral convergence under p enrichment in the whole space? time domain of interest . Formulating the approximation in terms of a space?time Trefftz basis makes high order time integration an inherent property of the method and clearly sets it apart from methods which employ a high order approximation in space only.