Infinite-energy 2D statistical solutions to the equations of incompressible fluids

Details Infinite-energy 2D statistical solutions to the equations of incompressible fluids Infinite-energy 2D statistical solutions to the equations of incompressible fluids

2009-03-18

arxiv.org/abs/0903.3226v1

Mathematics

Analysis of PDEs

Scientific paper

We develop the concept of an infinite-energy statistical solution to the Navier-Stokes and Euler equations in the whole plane. We use a velocity formulation with enough generality to encompass initial velocities having bounded vorticity, which includes the important special case of vortex patch initial data. Our approach is to use well-studied properties of statistical solutions in a ball of radius R to construct, in the limit as R goes to infinity, an infinite-energy solution to the Navier-Stokes equations. We then construct an infinite-energy statistical solution to the Euler equations by making a vanishing viscosity argument.

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