講座題目:Immersed Finite Element Methods for Three-Dimensional Interface Problems
講座時間:2024年6月18日(周二)10:30--11:30
講座地點:犀浦校區(qū)3號教學樓30401
主講人簡介:
張旭,美國俄克拉荷馬州立大學副教授。2005年和2008年在四川大學kaiyun開云官方網(wǎng)站分別獲得學士和碩士學位,2013年在美國弗吉尼亞理工大學獲得博士學位。2013-2016年在美國普渡大學做博士后。2016年入職密西西比州立大學擔任助理教授。2019年起就職俄克拉荷馬州立大學,2022年晉升副教授并獲終身教職。
張旭教授的研究領域是數(shù)值偏微分方程,研究問題包括界面問題的有限元方法,自適應算法,超收斂分析等。自2017年起他主持多項美國自然科學基金的科研項目。他的研究成果在SINUM, SISC, JCP, CMAME, JSC 等期刊發(fā)表論文30多篇,并有超過1200次的同行引用。他現(xiàn)擔任SIAM美國中部分會主席。
講座內(nèi)容簡介:
Interface problems arise in many applications in science and engineering. Partial differential equations (PDEs) are often used to model interface problems. Solutions to these PDE interface problems often involve kinks, singularities, discontinuities, and other non-smooth behaviors. The immersed finite element method (IFEM) is a class of numerical methods for solving PDE interface problems with unfitted meshes. In this talk, I will introduce recent advances in developing and analyzing several IFEMs for solving 3D interface problems. The proposed method can be utilized on interface-unfitted meshes even if the interface possesses an arbitrary shape. The new IFE space is isomorphic to the standard finite element space, and the isomorphism is stable with respect to the interface location. The IFE method is proven to maintain optimal convergence in both the energy norm and the L2 norm. Numerical examples will be provided to verify our theoretical results and demonstrate the applicability of this method in tackling some real-world 3D interface models.