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科学计算系列学术报告:A semi-implicit projection method for the Landau-Lifshitz equation and its convergence analysis

发布人:日期:2025年06月06日 10:47浏览数:

报告题目:A semi-implicit projection method for the Landau-Lifshitz equation and its convergence analysis

报 告 人:王成教授 麻省大学达特茅斯分校

报告时间:202569日  10:00-11:00

报告地点:数学研究中心528

报告摘要:

A second order accurate numerical scheme for the Landau-Lifshitz equation, the dynamics of magnetization in a ferromagnetic material with a non-convex constraint, is proposed and analyzed. The temporal discretization is based on the second-order backward differentiation formula, combined with the one-sided extrapolation for the coefficient function, so that the numerical method preserves a linear nature. Subsequently, a projection step is used to preserve the length of the magnetization. The unique solvability of this scheme is theoretically guaranteed with the help of monotonicity analysis. In addition, the convergence analysis for the fully discrete numerical solution is established, with second-order accuracy in both time and space. Some numerical results are also presented in the talk.

报告人简介:

王成,麻省大学达特茅斯分校数学系教授,1993年本科毕业于中国科技大学,2000年在美国坦普尔大学获得博士学位,2000-2003年在美国印尼安纳大学从事博士后研究工作,2003-2008年在美国田纳西大学任助理教授,2008-2012年在美国麻省大学 达特茅斯分校任助理教授,2012年晋升为副教授,2019年晋升为教授。王成教授的主要研究领域是应用数学与计算数学,包括数值分析、偏微分方程、流体力学、计算电磁学等,目前已在Journal of Computational Physics, SIAM Journal on Numerical Analysis, Mathematics of Computation, Numerische Mathematik等期刊上发表论文一百多篇。

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