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2022年实验室年会特邀报告——关于三维各向异性Navier-Stokes方程的整体解

特邀报告人:张平  院士

时间:2022-12-10  9:40-10:40

地点:腾讯会议:734-737-203  会议密码:221210

视频链接(请仅用于学习回放):https://disk.pku.edu.cn:443/link/F66C4A37E7EDCF2E70419C14C0328E0A

 

报告摘要

In this paper, we first prove the global existence of strong solutions to 3-D incompressible Navier-Stokes equations with solenoidal vector field initial data, which writes in the cylindrical coordinate is of the form: ${\rm A}(r,z)\cos N\th +{\rm B}(r,z)\sin N\th,$ provided that $N$ is large enough.

The main idea of the proof is to write the solution in the trigonometrical series in the $\th$ variable and estimate the coefficients separately in some scaling invariant spaces. We remark that the most crucial step to derive the classical {\it a priori} estimate of the solution is to handle a sort weighted sum of the norms of the coefficients. Then we extend the above well-posedness result for initial data which is linear combinations of axisymmetric initial without swirl and infinite high mode  trigonometric series in the angular variable.

 

嘉宾介绍:

张平,现任中科院数学与系统科学研究院副院长,中国科学院院士。曾于2005年获国家杰出青年基金;2007年获第十届中国青年科技奖; 2011年获国家自然科学二等奖;2014年获聘国家重大人才计划特聘教授;2019年获中国数学会陈省身奖等奖项,2021年被评为中国科学院院士。自1997年以来,共在Comm. Pure Appl. Math.,Ann. Sci. École Norm. Sup., Arch. Ration. Mech. Anal., Comm. Math. Phys.,Adv. Math., J. Reine Angew. Math.等杂志发表文章110余篇,在美国数学会出版专著一本。主要研究领域为粘性不可压缩流体力学方程组与非线性Schraedinger方程的半经典极限。