Existence of global strong solution for compressible Navier Stokes equations in one dimension with for degenerate viscosity coefficients

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• Boris Haspot (Univ. Paris-Dauphine)
• Monday 10 February 2020, 15:00-16:00
• CMS, MR13.

If you have a question about this talk, please contact Jessica Guerand.

In this talk we prove the existence of global strong solution for the Navier-Stokes equations with general degenerate viscosity coefficients in one dimension. The cornerstone of the proof is the introduction of a new effective pressure which allows to obtain an Oleinik-type estimate for the so called effective velocity. It enables us to control the $L^\infty$ norm of $\frac{1}{\rho}$ with $\rho$ the density. In our proof we make use also of additional regularizing effects on the velocity which requires to extend the techniques developed by Hoff for the constant viscosity case.

This talk is part of the Partial Differential Equations seminar series.

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