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CNA Seminar/Colloquium/Joint Pitt-CNA Colloquium
Cheng Yu
UT Austin
Title: Existence of global weak solutions for 3D degenerate compressible Navier-Stokes equations

Abstract: In this talk, we discuss the existence of global weak solutions for 3D compressible Navier-Stokes equations with degenerate viscosity. The method is based on the Bresch and Desjardins entropy conservation. The main contribution is to derive the Mellet-Vasseur type inequality for the weak solutions, even if it is not verified by the first level of approximation. This provides existence of global solutions in time, for the compressible Navier-Stokes equations, in three dimensional space, with large initial data possibly vanishing on the vacuum. This solves an open problem proposed by Lions.

Recording: http://mm.math.cmu.edu/recordings/cna/Cheng_Yu_small.mp4
Date: Tuesday, September 6, 2016
Time: 1:30 pm
Location: Wean Hall 7218
Submitted by:  David Kinderlehrer