Effect of hyperviscosity on the Navier-Stokes turbulence

Details Effect of hyperviscosity on the Navier-Stokes turbulence Effect of hyperviscosity on the Navier-Stokes turbulence

2010-02-26

arxiv.org/abs/1002.4979v2

Electronic Journal of Differential Equations (Electron. J. Diff. Equ) 2010, 110 (2010) 19

Mathematics

Analysis of PDEs

Scientific paper

In this paper we modified the Navier-Stokes equations by adding a higher order artificial viscosity term to the conventional system. We first show that the solution of the regularized system converges strongly to the solution of the conventional system as the regularization parameter goes to zero, for each dimension d $\le$ 4. Then we show that the use of this artificial viscosity term leads to truncated the number of degrees of freedom in the long-time behavior of the solutions to these equations. This result suggests that the hyperviscous Navier-Stokes system is an interesting model for three-dimensional fluid turbulence.

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