Fluid Mechanics and Acoustics Laboratory - UMR 5509

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


Supervisory authorities

Our partners




Home > Teams > Turbulence & Instabilities

Turbulence & Instabilities

Head: Florence Raynal

The team activities, rather fundamental, deal with hydrodynamic instabilities, transition to turbulence, turbulent flows and flows at small scale.


 T&I news: 

Aurore Naso

Habilitation à diriger des recherches ECL

Aurore Naso

Mardi 26 mars 2019 – 14h00 – ECL – Amphi 202

Transport et structures en turbulence hydrodynamique. $\ $
Jury: M. Christophe BAUDET, Professeur des Universités, Rapporteur, Université Grenoble Alpes M. François CHARRU, Professeur des (...)

Read more

Une baguette magique pour mélanger le silicium fondu... sans baguette !

Projet Inter-Carnot ASTRES + Awinsi

Une baguette magique pour mélanger le silicium fondu... sans baguette !

Valéry Botton & Sophie Miralles

Mélanger dans un four de solidification de silicium photovoltaïque, donc dans un milieu opaque, à très haute température (environ 1400°C), sans le "polluer" ? C’est possible ! Avec des chercheurs du (...)

Read more

A 2D½ model for natural convection and solidification in a narrow enclosure

Article in Int. J. Therm. Sci. (2019)

A 2D½ model for natural convection and solidification in a narrow enclosure

I. Hamzaoui, S. Millet, V. Botton, A. Benzaoui, D. Henry, L. Hachani, R. Boussaa, K. Zaidat & Y. Fautrelle

Efficient numerical models are derived for problems of natural convection and material solidification in a horizontal differentially heated slender cavity. These 2D$^1/2$ models are obtained by (...)

Read more

An improved multiscale Eulerian–Lagrangian method for simulation of atomization process

Article in Comput. Fluids (2018)

An improved multiscale Eulerian–Lagrangian method for simulation of atomization process

Davide Zuzio, Jean-Luc Estivalèzes & Bastien Di Pierro

The physics of atomization process involve many spatial scales, generating a wide variety of liquid inclusions of different sizes with large density and viscosity ratios between liquid and gas (...)

Read more

 Investigation of the dynamics in separated turbulent flow

Article in Eur. J. Mech. B-Fluids (2019)

Investigation of the dynamics in separated turbulent flow

Fawzi Fadla, Frédéric Alizard, Laurent Keirsbulck, Jean-Christophe Robinet, Jean-PhilippeLaval, Jean-Marc Foucaut, Camila Chovet & Marc Lippert

Dynamical behavior of the turbulent channel flow separation induced by a wall-mounted two-dimensional bump is studied, with an emphasis on unsteadiness characteristics of vortical motions (...)

Read more

Nonlinear spectral model for rotating sheared turbulence

Article in J. Fluid Mech. (2019)

Nonlinear spectral model for rotating sheared turbulence

Ying Zhu, Claude Cambon, Fabien. Godeferd & Aziz Salhi

We propose a statistical model for homogeneous turbulence undergoing distortions, which improves and extends the MCS model by Mons, Cambon & Sagaut (2016). The spectral tensor of two-point (...)

Read more

Multiscale analysis of the structure of homogeneous rotating turbulence

Article in Phys. Rev. Fluids (2019)

Multiscale analysis of the structure of homogeneous rotating turbulence

Aurore Naso

The structure of homogeneous rotating turbulence at moderate Reynolds number is investigated by analyzing the instantaneous statistics of the scale-dependent velocity gradient tensor perceived by (...)

Read more

Helicity Dynamics, Inverse, and Bidirectional Cascades in Fluid and Magnetohydrodynamic Turbulence: A Brief Review

Article in Earth Space Sci. (2019)

Helicity Dynamics, Inverse, and Bidirectional Cascades in Fluid and Magnetohydrodynamic Turbulence: A Brief Review

A. Pouquet, D. Rosenberg, J.E. Stawarz & R. Marino

We briefly review helicity dynamics, inverse and bidirectional cascades in fluid and magnetohydrodynamic (MHD) turbulence, with an emphasis on the latter. The energy of a turbulent system, an (...)

Read more

Restricted nonlinear model for high- and low-drag events in plane channel flow

Article in J. Fluid Mech. (2019)

Restricted nonlinear model for high- and low-drag events in plane channel flow

Frédéric Alizard & Damien Biau

A restricted nonlinear (RNL) model, obtained by partitioning the state variables into streamwise-averaged quantities and superimposed perturbations, is used in order to track the exact coherent (...)

Read more

Turbulence-Driven Ion Beams in the Magnetospheric Kelvin-Helmholtz Instability

Article in Phys. Rev. letters (2019)

Turbulence-Driven Ion Beams in the Magnetospheric Kelvin-Helmholtz Instability

Luca Sorriso-Valvo, Filomena Catapano, Alessandro Retinò, Olivier Le Contel, Denise Perrone, Owen W. Roberts, Jesse T. Coburn, Vincenzo Panebianco, Francesco Valentini, Silvia Perri, Antonella Greco, Francesco Malara, Vincenzo Carbone, Pierluigi Veltri, Oreste Pezzi, Federico Fraternale, Francesca Di Mare, Raffaele Marino, Barbara Giles, Thomas E. Moore, Christopher T. Russell, Roy B. Torbert, Jim L. Burch & Yuri 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 (...)

Read more

Bifurcations from steady to quasi-periodic flows in a laterally heated cavity filled with low Prandtl number fluids

Article in J. Fluid Mech. (2019)

Bifurcations from steady to quasi-periodic flows in a laterally heated cavity filled with low Prandtl number fluids

Abdessamed Medelfef, Daniel Henry, Ahcene Bouabdallah & Slim Kaddeche

This study deals with the transition toward quasi-periodicity of buoyant convection generated by a horizontal temperature gradient in a three-dimensional parallelepipedic cavity with dimensions (...)

Read more

Instabilities in viscosity-stratified two-fluid channel flow over an anisotropic-inhomogeneous porous bottom

Article in Phys. Fluids (2019)

Instabilities in viscosity-stratified two-fluid channel flow over an anisotropic-inhomogeneous porous bottom

Geetanjali Chattopadhyay, Usha Ranganathan & Séverine Millet

A linear stability analysis of a pressure driven, incompressible, fully developed laminar Poiseuille flow of immiscible two-fluids of stratified viscosity and density in a horizontal channel (...)

Read more

The size and lifetime of organised eddies in a non-solid-body rotating turbulence experiment

Article in Eur. J. Mech. B-Fluids (2019)

The size and lifetime of organised eddies in a non-solid-body rotating turbulence experiment

Lian Gan & Andrea Maffioli

This paper follows our previous study of forced non-solid-body rotating turbulence and summarises results on the eddy size and lifetime in the same flow. The experiment is conducted in a (...)

Read more