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关于举行刘成杰副教授(上海交通大学)学术报告会的通知

发布时间:2022-07-04文章来源:华南理工大学数学学院浏览次数:533

报告题目:Linear spectral instability of Hartmann layer via the Tollmien-Schlichting waves

报 人:刘成杰副教授上海交通大学

报告时间:2022年7月6日(星期三)下午2:30-3:30

报告地点:腾讯会议:342-882-399

邀 人:吴笛 副教授

欢迎广大师生前往!

数学学院

2022年7月4日

 

报告摘要:In this talk, I will show the instability induced by the Tollmien-Schlichting wave governed by the MHD system in the Prandtl-Hartmann regime. The interaction of the inviscid mode and viscous mode that leads to the instability is analyzed by the introduction of a new decomposition of the Orr-Sommerfeld operator on the velocity and magnetic fields. The critical Gevrey index for the instability is justified by constructing the growing mode in the essential frequency and it is shown to be the same as the incompressible Navier-Stokes equations in the Prandtl regime. This result justifies rigorously the physical understanding that the transverse magnetic field to the boundary in the Prandtl-Hartmann regime has no extra stabilizing effect on the Tollmien-Schlichting wave. This is a joint work with Prof. Tong Yang and Dr. Zhu Zhang.

 

报告人简介:刘成杰,上海交通大学副教授,博士生导师,国家高层次青年人才入选者。本科毕业于上海交通大学数学系,在上海交通大学取得博士学位,之后在香港城市大学从事博士后研究。刘成杰的研究领域是非线性偏微分方程以及流体力学中边界层理论的数学分析,主要研究成果发表在Comm. Pure Appl. Math., Adv. Math., Arch. Rational Mech. Anal., J. Math. Pure Appl.SIAM J. Math. Anal.等数学专业期刊上。