• Presentation Name: High-Order and Adaptive Time Stepping Methods for Energy Gradient Flows
    Presenter⚖️: 汤涛 教授
    Date: 2013-04-06
    Location🔛: 光华东主楼1801
    Abstract🌪🗂:

    Abstract: The key idea of the phase-field methodology is to replace sharp interfaces by thin transition regions where interfacial forces are smoothly distributed. One of the main reasons for the success of the phase-field methodology is that it is based on rigorous mathematics and thermodynamics. Most phase-field models satisfy a nonlinear stability relationship, usually expressed as a time-decreasing free-energy functional, which is called energy gradient stability. To obtain accurate numerical solutions of such problems, it is desirable to use high-order approximations in space and time. Yet because of the difficulties introduced by the combination of nonlinearity and stiffness, most computations have been limited to lower-order in time, and in most cases to constant time-stepping. On the other hand, numerical simulations for many physical problems require large time integration; as a result large time-stepping methods become necessary in some time regimes. To effectively solve the relevant physical problems, the combination of higher-order and highly stable temporal discretizations becomes very useful. In this talk, we will describe some adaptive time stepping approach for phase-field problems, which inherits the energy gradient stability of the continuous model. Particular attention will be given to effectively resolve both the solution dynamics and steady state solutions.

     

    Annual Speech Directory: No.21

    220 Handan Rd., Yangpu District, Shanghai ( 200433 )| Operator:+86 21 65642222

    Copyright © 2016 FUDAN University. All Rights Reserved

    杏悦专业提供:杏悦👱🏿、等服务,提供最新官网平台、地址、注册、登陆、登录、入口、全站、网站、网页、网址、娱乐、手机版、app、下载、欧洲杯、欧冠、nba、世界杯、英超等,界面美观优质完美,安全稳定,服务一流,杏悦欢迎您。 杏悦官网xml地图
    杏悦 杏悦 杏悦 杏悦 杏悦 杏悦 杏悦 杏悦 杏悦 杏悦