•  学术报告

关于举行复旦大学周忆教授和雷震教授学术报告的通知

发布时间:2017-04-12文章来源:浏览次数:84

报告题目1:Structureof Helicity and Global Solutions of Incompressible Navier-Stokes

 Equation
报告人:周忆教授(复旦大学)
报告时间:2016年4月20日(周三)上午9:30-10:30

报告题目2:2维Muskat自由边值问题解的整体存在性
报告人:雷震教授(复旦大学)
报告时间:2016年4月20日(周三)上午10:30-11:30

报告地点:4号楼4318室


欢迎广大师生前往!

                                                                    数学学院

                                                                  2016年4月13日

 

报告摘要1:
   In this paper we derive a new energy identity for the generalthree-dimensional incompressible Navier-Stokes equations by thevirtue of a special structure of helicity. The new energy identity iscritical with respect to its natural scaling. Moreover, it isconditionally coercive. As an application we construct a family ofnite energy smooth large solutions to the Navier-Stokes equationswhose critical norms can be arbitrarily large.

报告摘要2:
   We consider the evolution of two incompressible, immiscible fluidswith different densities in porus media, known as the Muskat problemwhich in 2D is analogous to the Hele-Shaw cell. We establish, for aclass of large and monotone initial data, the global existence ofweak solutions. The proof is based on a local well-posedness resultfor the initial data with certain specific asymptotics at spatialinfinity and a new maximum principle for the first derivative of thegraph function. This is a joint work with Dr. Fan Deng and professorFanghua Lin.

报告人简介:

周忆教授简介:周忆教授为国家级人才、国家杰出青年基金获得者。长期从事非线性波动方程的数学理论研究工作,在非线性波动方程解的奇性、整体适定性等领域取得了一系列国际领先的研究成果,曾获教育部自然科学一等奖、国家自然科学三等奖等。

雷震教授简介:雷震教授为国家级人才、国家优秀青年基金获得者,研究方向为流体力学中的偏微分方程。