Laboratoire de Mécanique des Fluides et d'Acoustique - UMR 5509

LMFA - UMR 5509
Laboratoire de Mécanique des Fluides et d’Acoustique
Lyon
France


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Accueil > Équipes > Turbulence & Instabilités > Publications T&I > Publications T&I 2014

Publications T&I 2014

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On the anisotropy of the turbulent passive scalar in the presence of a mean scalar gradient

Article dans J. Fluid Mech. (2014)

On the anisotropy of the turbulent passive scalar in the presence of a mean scalar gradient

Wouter J. T. Bos

We investigate the origin of the scalar gradient skewness in isotropic turbulence on which a mean scalar gradient is imposed. The problem of the advection of an anisotropic scalar field is (...)

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Scaling law of resolved-scale isotropic turbulence and its application in large-eddy simulation

Article dans Acta Mech. Sin. (2014)

Scaling law of resolved-scale isotropic turbulence and its application in large-eddy simulation

Le Fang, Bo Li & Lu Li-Peng

Eddy-dampingquasinormal Markovian (EDQNM) theory is employed to calculate the resolved-scale spectrum and transfer spectrum, based on which we investigate the resolved-scale scaling law. Results (...)

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Cross-helicity in Rotating Homogeneous Shear-Stratified Turbulence

Article dans Phys. Rev. letters (2014)

Cross-helicity in Rotating Homogeneous Shear-Stratified Turbulence

A. B. Pieri, F. S. Godeferd, C. Cambon, B. Dubrulle & S. Thalabard

We consider homogeneous shear-stratified turbulence in a rotating frame, that exhibits complex nonlinear dynamics. Since the analysis of relative orientation between coupled fluctuating fields (...)

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The temperature spectrum generated by frictional heating in isotropic turbulence

Article dans J. Fluid Mech. (2014)

The temperature spectrum generated by frictional heating in isotropic turbulence

Wouter J. T. Bos

In every turbulent flow with non-zero viscosity, heat is generated by viscous friction. This heat is then mixed by the velocity field. We consider how heat fluctuations generated in this way are (...)

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Petascale direct numerical simulation : DNS of boundary layer transition in channel flows

Article dans PRACE Newsletter (2014)

Petascale direct numerical simulation : DNS of boundary layer transition in channel flows

Marc Buffat, Anne Cadiou & Lionel Le Penven

Understanding the mechanisms involved in the turbulent transition of boundary layers is crucial for many engineering domains. They are mainly studied by analytical theories supplemented by direct (...)

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Aerodynamics of buoyant releases within a longitudinally ventilated tunnel

Article dans Exp. Therm. Fluid Sci. (2014)

Aerodynamics of buoyant releases within a longitudinally ventilated tunnel

J. Le Clanche, P. Salizzoni, M. Creyssels, R. Mehaddi, F. Candelier & O.Vauquelin

The dynamics of a positively buoyant release in a cross-flow within a rectangular channel are investigated. In particularly, we focus on the effects that determine the so-called ‘critical (...)

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Effective viscosity in quantum turbulence : A steady-state approach

Article dans Europhys. Lett. (2014)

Effective viscosity in quantum turbulence : A steady-state approach

Simone Babuin, Emil Varga, Ladislav Skrbek, Emmanuel Lévêque & Philippe-E. Roche

The concept of "effective viscosity" $\nu_\mathrmeff$ of superfluid helium, widely used to interpret decaying turbulence, is tested in the steady-state case. We deduce $\nu_\mathrmeff$ from (...)

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Prevalence of the sling effect for enhancing collision rates in turbulent suspensions

Article dans J. Fluid Mech. (2014)

Prevalence of the sling effect for enhancing collision rates in turbulent suspensions

Michel Voßkuhle, Alain Pumir, Emmanuel Lévêque & Michael Wilkinson

Turbulence facilitates collisions between particles suspended in a turbulent flow. Two effects have been proposed that can enhance the collision rate at high turbulence intensities : ‘preferential (...)

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Simulation of confined magnetohydrodynamic flows with Dirichlet boundary conditions using a pseudo-spectral method with volume penalization

Article dans J. Comput. Phys. (2014)

Simulation of confined magnetohydrodynamic flows with Dirichlet boundary conditions using a pseudo-spectral method with volume penalization

Jorge A.Morales, Matthieu Leroy, Wouter J. T. Bos & Kai Schneider

A volume penalization approach to simulate magnetohydrodynamic (MHD) flows in confined domains is presented. Here the incompressible visco-resistive MHD equations are solved using parallel (...)

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Observation Model Based on Scale Interactions for Optical Flow Estimation

Article dans IEEE Trans. Image Process. (2014)

Observation Model Based on Scale Interactions for Optical Flow Estimation

Pascal Zille, Thomas Corpetti, Liang Shao & Xu Chen

In this paper, an original observation model for multiresolution optical flow estimation is introduced. Multiresolution frameworks, often based on coarse-to-fine warping strategies, are widely (...)

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