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arXiv · 2004.11264

Analytic regularity for the incompressible Navier-Stokes equations in polygons

Carlo Marcati·Christoph Schwab
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Abstract

In a plane polygon $P$ with straight sides, we prove analytic regularity of the Leray-Hopf solution of the stationary, viscous, and incompressible Navier-Stokes equations. We assume small data, analytic volume force and no-slip boundary conditions. Analytic regularity is quantified in so-called countably normed, corner-weighted spaces with homogeneous norms. Implications of this analytic regularity include exponential smallness of Kolmogorov $N$-widths of solutions, exponential convergence rates of mixed $hp$-discontinuous Galerkin finite element and spectral element discretizations and of model order reduction techniques.

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Carlo Marcati, Christoph Schwab. 2020-04-23. Analytic regularity for the incompressible Navier-Stokes equations in polygons. https://doi.org/10.1137/19m1247334

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