院士论坛及杰出学者讲坛|
发表时间:2018-05-25 阅读次数:1091次
报告题目: 杰出学者讲坛(二十):Effective boundary conditions of diffusion equations on domains containing thin layers
报 告 人:王学锋 教授
报告人所在单位:南方科技大学
报告日期:2018-05-25 星期五
报告时间:14:00-15:00
报告地点:光华东主楼1501
  
报告摘要:

This is going to be survey talk on a class of diffusion equations. Of concern is the following scenario: a domain consists of two parts, with one of them being a thin layer; on the domain we have a diffusion equation, one of whose physical parameters such as diffusion coefficient has different size scales on different subdomains. This kind of problem arises in real applications such as thermal barrier coatings of turbine engine blades, and effects of roads on the spreading of populations and epidemics.  Numerical computation of such a diffusion equation on such a domain is time-consuming because we would need very fine grids on the thin layer; moreover, we cannot see easily the effects of the thin layer on the dynamics of the diffusion equation.  A good way to resolve this problem is to think of the thin layer as a thickless surface/curve, on which we impose an effective boundary condition (EBC); then hopefully with ease we can solve, numerically, the diffusion equation on the remaining subdomain with the EBC; furthermore, we can see the effects of the thin layer via EBC. We will review classic theorems, and introduce results obtained in recent years, as well as results that have not been published. These results not only are of practical significance, but also bring some new challenges to pure PDE-research.

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本年度学院报告总序号:12

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