Navier-Stokes equations on the flat cylinder with vorticity production on the boundary

Details Navier-Stokes equations on the flat cylinder with vorticity production on the boundary Navier-Stokes equations on the flat cylinder with vorticity production on the boundary

2010-02-22

arxiv.org/abs/1002.4126v1

Physics

Mathematical Physics

25 pages

Scientific paper

We study the two-dimensional Navier-Stokes system on a flat cylinder with the usual Dirichlet boundary conditions for the velocity field u. We formulate the problem as an infinite system of ODE's for the natural Fourier components of the vorticity, and the boundary conditions are taken into account by adding a vorticity production at the boundary. We prove equivalence to the original Navier-Stokes system and show that the decay of the Fourier modes is exponential for any positive time in the periodic direction, but it is only power-like in the other direction.

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