报告题目:Model reduction methods by the Onsager principle
报告人:许现民中国科学院数学与系统科学研究院
报告时间:2023年11月15日17:00-18:00
报告地点:数学院235
报告摘要:The Onsager variational principle is a fundamental law for irreversible processes in statistic physics. It can be used to develop PDE models for many complicated problems in soft matter. Recently, the principle has been used as an approximation tool to derive reduced models for many multi-scale multi-physics systems. In this talk, I will present the main idea of the model reduction method by the Onsager principle. In particular, I will present applications of the method in numerical analysis, including derivation of a diffusion-generated motion method for wetting problems, and moving finite element methods for mean curvature flows and porous media equations.
许现民,现为中国科学院计算数学与科学工程计算研究所研究员,2003年本科毕业于南开大学,2009年博士毕业于北京大学,曾先后赴英国牛津大学、香港科技大学和德国亚琛工业大学进行长期学术访问或博士后研究。其主要研究兴趣是软物质科学中复杂多尺度多物理问题的建模、分析和计算。在两相流问题建模与计算、非线性弹性可计算建模及曲面上偏微分方程数值方法等方面取得一系列优秀成果。迄今共发表学术论文四十余篇,大多发表在应用和计算数学及相关领域的一流期刊上,包括Arch. Rational Mech. Anal.,SIAM J. Appl. Math., SIAM J. Numer. Anal., SIAM J. Sci. Comput.,J. Fluid Mech., J. Comput. Phys., Numer. Math.等。担任Int. J. Numer. Anal. Mod.等期刊编委。曾受邀在第二十届流体力学数值方法研讨会上做大会报告。2018年入选中科院数学与系统科学院“陈景润未来之星”人才计划。