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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

1Structureof Helicity and Global Solutions of Incompressible Navier-Stokes

 Equation
人:周教授(复旦大学)
时间2016420日(周三)上午9:30-10:30

22Muskat自由边值问题解的整体存在性
人:雷震教授(复旦大学)
时间2016420日(周三)上午10:30-11:30

告地点:4号楼4318


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                                                                    数学学院

                                                                  2016413

 

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.

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.

告人介:

教授介:周教授为国家级人才、国家杰出青年基金得者。期从事非线性波方程的数学理研究工作,在非线性波方程解的奇性、整体适定性等域取得了一系列国际领先的研究成果,曾教育部自然科学一等、国家自然科学三等等。

雷震教授:雷震教授国家级人才、国家秀青年基金得者,研究方向流体力学中的偏微分方程。