A quadratic Reynolds stress development ...
Document type :
Compte-rendu et recension critique d'ouvrage
DOI :
Title :
A quadratic Reynolds stress development for the turbulent Kolmogorov flow
Author(s) :
Wu, Wenwei [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Université du Littoral Côte d'Opale [ULCO]
Schmitt, François [Auteur]
Calzavarini (Admin), Enrico [Auteur]
Unité de Mécanique de Lille - ULR 7512 [UML]
Wang, Lipo [Auteur]
![refId](/themes/Mirage2//images/idref.png)
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]
Université du Littoral Côte d'Opale [ULCO]
Schmitt, François [Auteur]
Calzavarini (Admin), Enrico [Auteur]
![refId](/themes/Mirage2//images/idref.png)
Unité de Mécanique de Lille - ULR 7512 [UML]
Wang, Lipo [Auteur]
Journal title :
Physics of Fluids
Pages :
125129
Publisher :
American Institute of Physics
Publication date :
2021-12
ISSN :
1070-6631
HAL domain(s) :
Physique [physics]/Physique [physics]/Dynamique des Fluides [physics.flu-dyn]
English abstract : [en]
We study the three-dimensional turbulent Kolmogorov flow, i.e. the Navier-Stokes equations forced by a single-low-wave-number sinusoidal force in a periodic domain, by means of direct numerical simulations. This classical ...
Show more >We study the three-dimensional turbulent Kolmogorov flow, i.e. the Navier-Stokes equations forced by a single-low-wave-number sinusoidal force in a periodic domain, by means of direct numerical simulations. This classical model system is a realization of anisotropic and non-homogeneous hydrodynamic turbulence. Boussinesq’s eddy viscosity linear relation is checked and found to be approximately valid over half of the system volume. A more general quadratic Reynolds stress development is proposed and its parameters estimated at varying the Taylor scale-based Reynolds number in the flow up to the value 200. The case of a forcing with a different shape, here chosen Gaussian, is considered and the differences with the sinusoidalforcing are emphasized.Show less >
Show more >We study the three-dimensional turbulent Kolmogorov flow, i.e. the Navier-Stokes equations forced by a single-low-wave-number sinusoidal force in a periodic domain, by means of direct numerical simulations. This classical model system is a realization of anisotropic and non-homogeneous hydrodynamic turbulence. Boussinesq’s eddy viscosity linear relation is checked and found to be approximately valid over half of the system volume. A more general quadratic Reynolds stress development is proposed and its parameters estimated at varying the Taylor scale-based Reynolds number in the flow up to the value 200. The case of a forcing with a different shape, here chosen Gaussian, is considered and the differences with the sinusoidalforcing are emphasized.Show less >
Language :
Anglais
Popular science :
Non
Source :
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