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Effet de blocage dans un écoulement turbulent non cisaillé

Abstract : A Navier-Stokes solver for incompressible flow has been developed using a mixed spectral/finite-difference approach, while being compatible with a massively parallel environment. We use it to perform direct numerical simulations in a situation where the turbulent agitation is synthesized under the action of a random forcing. The turbulence production is confined in a central layer and self-diffuses towards a free-slip or no-slip surface. With this set-up, we obtain a statistical steady state in which the mean shear, usually associated with the turbulence production, is zero. These conditions allow a better understanding of the intercomponent energy transfer, induced by the slow part of the pressure-strain correlation in the Reynolds tensor budget. We focus on this transfer when it occurs in combination with the blocking effect, in the vicinity of the surface. The results will help to model the pressure-strain correlation in a second- order-closure context.
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https://tel.archives-ouvertes.fr/tel-00449404
Contributor : Julien Bodart <>
Submitted on : Thursday, January 21, 2010 - 3:05:46 PM
Last modification on : Wednesday, January 23, 2019 - 3:12:11 PM
Long-term archiving on: : Thursday, October 18, 2012 - 12:56:03 PM

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  • HAL Id : tel-00449404, version 1

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Julien Bodart. Effet de blocage dans un écoulement turbulent non cisaillé. Mécanique [physics.med-ph]. Institut National Polytechnique de Toulouse - INPT, 2009. Français. ⟨tel-00449404⟩

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