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 > Thématiques > MHD, plasmas et superfluides

Anisotropic dynamics of conducting fluids with and without rotation

Anisotropic dynamics of conducting fluids with and without rotation


Turbulence, waves and instabilities in conducting fluids are investigated using high resolution numerical simulations and theoretical analysis. A particular emphasis is put on the anisotropic character of the flows induced by the presence of a magnetic field.


Staff involved : C. Cambon, F. Godeferd & R. Marino.


Associated publications :

Nonlinear Effects on the Precessional Instability in Magnetized Turbulence

Article dans Atmosphere (2020)

Nonlinear Effects on the Precessional Instability in Magnetized Turbulence

Abdelaziz Salhi, Amor Khlifi & Claude Cambon

By means of direct numerical simulations (DNS), we study the impact of an imposed uniform magnetic field on precessing magnetohydrodynamic homogeneous turbulence with a unit magnetic Prandtl (...)

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Sudden diffusion of turbulent mixing layers in weakly coupled plasmas under compression

Article dans Phys. Rev. E (2019)

Sudden diffusion of turbulent mixing layers in weakly coupled plasmas under compression

Giovanni Viciconte, Benoît-Joseph Gréa, Fabien S. Godeferd, Philippe Arnault & Jean Clérouin

The rapid growth of viscosity driven by temperature increase in turbulent plasmas under compression induces a sudden dissipation of kinetic energy, eventually leading to the relaminarization of (...)

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The low-frequency break observed in the slow solar wind magnetic spectra

Article dans Astronomy & Astrophysics (2019)

The low-frequency break observed in the slow solar wind magnetic spectra

Roberto Bruno, Daniele Telloni, Luca Sorriso-Valvo, Raffaele Marino, Rossana De Marco, Raffaela D’Amicis

Fluctuations of solar wind magnetic field and plasma parameters exhibit a typical turbulence power spectrum with a spectral index ranging between ∼ 5/3 and ∼ 3/2. In particular, at 1 AU, the (...)

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Kinetic-magnetic energy exchanges in rotating magnetohydrodynamic turbulence

Article dans Journal of Turbulence (2019)

Kinetic-magnetic energy exchanges in rotating magnetohydrodynamic turbulence

Fatma Salma Baklouti, Amor Khlifi, Abdelaziz Salhi, Fabien Godeferd, Claude Cambon, Thierry Lehner

We use direct numerical simulations to study the dynamics of incompressible homogeneous turbulence subjected to a uniform magnetic field B in a rotating frame with rotation vector (...)

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Turbulence-driven ion beams in the magnetospheric Kelvin-Helmholtz instability

Article dans Phys. Rev. letters (2019)

Turbulence-driven ion beams in the magnetospheric Kelvin-Helmholtz instability

L. Sorriso-Valvo, F. Catapano, A. Retinò, O. Le Contel, D. Perrone, O. W. Roberts, J. T. Coburn, V. Panebianco, F. Valentini, S. Perri, A. Greco, F. Malara, V. Carbone, P. Veltri, O. Pezzi, F. Fraternale, F. Di Mare, R. Marino, B. Giles, T. E. Moore, C. T. Russell, R. B. Torbert, J. L. Burch & Y. V. Khotyaintsev

The description of the local turbulent energy transfer and the high-resolution ion distributions measured by the Magnetospheric Multiscale mission together provide a formidable tool to explore (...)

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On the Statistical Properties of Turbulent Energy Transfer Rate in the Inner Heliosphere

Article dans Solar Physics (2018)

On the Statistical Properties of Turbulent Energy Transfer Rate in the Inner Heliosphere

Luca Sorriso-Valvo, Francesco Carbone, Silvia Perri, Antonella Greco, Raffaele Marino & Roberto Bruno

The transfer of energy from large to small scales in solar wind turbulence is an important ingredient of the long-standing question of the mechanism of the interplanetary plasma heating. Previous (...)

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Self-similar regimes of turbulence in weakly coupled plasmas under compression

Article dans Phys. Rev. E (2018)

Self-similar regimes of turbulence in weakly coupled plasmas under compression

Giovanni Viciconte, Benoît-Joseph Gréa, & Fabien S. Godeferd

Plasmas under strong compression, as existing in inertial confinement fusion capsules, experience a tremendous growth of their viscosity coefficient due to the temperature increase. It is known (...)

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Energy partition, scale by scale, in magnetic Archimedes Coriolis weak wave turbulence

Article dans Phys. Rev. E (2017)

Energy partition, scale by scale, in magnetic Archimedes Coriolis weak wave turbulence

A. Salhi, F. S. Baklouti, F. Godeferd, T. Lehner, and C. Cambon

Magnetic Archimedes Coriolis (MAC) waves are omnipresent in several geophysical and astrophysical flows such as the solar tachocline. In the present study, we use linear spectral theory (LST) and (...)

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Large-Eddy Simulations of Magnetohydrodynamic Turbulence in Heliophysics and Astrophysics

Article dans Space sci. rev. (2015)

Large-Eddy Simulations of Magnetohydrodynamic Turbulence in Heliophysics and Astrophysics

Mark Miesch, William Matthaeus, Axel Brandenburg, Arakel Petrosyan, Annick Pouquet, Claude Cambon, Frank Jenko, Dmitri Uzdensky, James Stone, Steve Tobias, Juri Toomre & Marco Velli

We live in an age in which high-performance computing is transforming the way we do science. Previously intractable problems are now becoming accessible by means of increasingly realistic (...)

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2013

Salhi A, Lehner T, Godeferd FS, Cambon C. Wave-Vortex mode coupling in astrophysical accretion disks under combined radial and vertical stratification. Astrophys. J.. 2013;771:103.

2012

Salhi A, Lehner T, Godeferd FS, Cambon C. Magnetized stratified rotating shear waves. Phys. Rev. E. 2012;85:026301.

2011

Favier B, Godeferd FS, Cambon C, Delache A, Bos WJT. Quasi-static magnetohydrodynamic turbulence at high Reynolds number. J. Fluid Mech.. 2011;681:434–461.

2010

Salhi A, Lehner T, Cambon C. Magnetohydrodynamic instabilities in rotating and precessing sheared flows: An asymptotic analysis. Phys. Rev. E. 2010;82:016315.