Fluid Mechanics and Acoustics Laboratory - UMR 5509

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

Turbulence & Instabilities

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

T&I news:

Abdessamed Medelfef

Bifurcations d’écoulements de convection naturelle dans une cavité chauffée latéralement

Mardi 20 mars 2018, 13h. Uinversité Lyon 1, Bât Omega, salle René Michel

Side heated buoyant convection has been for a long time a classical problem of fluid mechanics. Such a physical situation is ubiquitous both in nature and industry. Our interest in this problem (...)

Soutenance de thèse UCBL

Ronan KERVIL

Lundi 26 Mars 2018 – 14h00 – UCBL – salle de conférence BU

Matière active et écoulements : jets de bactéries et nageurs interfaciaux
Jury:
Bernard Pouligny, DR CNRS/ Université de Bordeaux, Rapporteur
Salima Rafai, CR CNRS/ Université de Grenoble Alpes, (...)

GDR CNRS 3763 Energies Marines Renouvelables

Énergies Marines Renouvelables : Nouveaux Concepts

Jeudi 29 mars 2018 de 10h30 à 16h30, ECL, bât W1, amphi 3

Le coût de l’énergie produite par les systèmes EMRs reste élevé par rapport au tarif de marché. Pour les technologies existantes, ce coût peut être réduit grâce aux mécanismes d’apprentissage et à (...)

Article in J. Fluid Mech. (2018)

The effective diffusivity of ordered and freely evolving bubbly suspensions

Aurore Loisy, Aurore Naso & Peter D. M. Spelt

We investigate the dispersion of a passive scalar such as the concentration of a chemical species, or temperature, in homogeneous bubbly suspensions, by determining an effective diffusivity (...)

Article in 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 (...)

Article in 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 (...)

Article in Fluid Dyn. Res. (2018)

Nonlinear travelling waves in rotating Hagen-Poiseuille flow

Benoît Pier & Rama Govindarajan

The dynamics of viscous flow through a rotating pipe is considered. Small-amplitude stability characteristics are obtained by linearizing the Navier—Stokes equations around the base flow and (...)

Article in Phys. Rev. Fluids (2018)

Cascades of energy and helicity in axisymmetric turbulence

Bo Qu, Aurore Naso, & Wouter J. T. Bos

A spectral analysis of strictly axisymmetric turbulence is performed. Both freely decaying and statistically steady flows are considered. In helical flows we identify a dual cascade, where energy (...)

Ice crystals are present in a variety of clouds, at sufficiently low temperature. We consider here mixed-phase clouds which, at temperature ≳−20$^\circ$C, contain ice crystals, shaped approximately (...)