On the statistical properties of the 3D incompressible Navier-Stokes-Voigt model

The Navier-Stokes-Voigt (NSV) model of viscoelastic incompressible fluid has been recently proposed as a regularization of the 3D Navier-Stokes equations for the purpose of direct numerical simulations. In this work we investigate its statistical properties by employing phenomeno- logical heuristic arguments, in combination with Sabra shell model simulations of the analogue of the NSV model. For large values of the regularizing parameter, compared to the Kolmogorov length scale, simulations exhibit multiscaling inertial range, and the dissipation range displaying low inter- mittency. These facts provide evidence that the NSV regularization may reduce the stiffness of direct numerical simulations of turbulent flows, with a small impact on the energy containing scales.

Keywords

Navier-Stokes-Voigt equations, Navier-Stokes-Voight equations, Navier-Stokes equations, regularization of the Navier-Stokes equations, turbulence models, viscoelastic models, shell models, dynamic models

2010 Mathematics Subject Classification

35Q30, 35Q35, 76F20, 76F55

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Published 1 January 2010