Antoine Venaille

CNRS researcher,  Laboratoire de Physique
Address ENS de Lyon, 46 allée d'Italie 69007,  Lyon France
Phone 0033  - 04 26 23 39 45
M1 018, site Modod
E-mai antoine.venaille at ens-lyon dot fr

My work is motivated by geophysical phenomena. I have been applying statistical mechanics ideas to describe self-organization and mixing in rotating-stratified flows. I am now working on wave-mean flow interactions and on topological fluid waves, borrowing concepts from condensed matter, while keeping a strong interest in atmospheric and oceanic dynamics.


A.23 C. Tauber, P. Delplace, A. Venaille 2019. Odd bulk-boundary correspondence in fluids - submitted .pdf
Shows that a topological index can be assigned to a given hemisphere for shallow water flows in the presence of odd viscous terms, and discusses consequences for equatorial waves. 
A.22 M. Perrot, P. Delplace, A. Venaille 2019. Topological transition in stratified atmospheres - submitted .pdf
Relates the existence of atmospheric Lamb waves to peculiar topological properties carried by acoustic and internal gravity waves, when inversion symmetry is broken by gravity in a compressible fluid.
A.21 A. Renaud, L.-P. Nadeau, A. Venaille 2019. Periodicity disruption of a model quasi-biennial oscillation - submitted .pdf
Shows the existence of a quasi-periodic route to chaos in idealized models of equatorial atmospheres, and investigates the response to external perturbations, motivated by an odd recent evolution of the QBO.
A.20 A. Renaud, A. Venaille 2018. Boundary streaming by internal waves   -Journal of Fluid Mechanics .pdf
Investigates mean-flow generation by damped internal gravity waves close to an undulating boundary.
A.19 T. Dauxois, S. Joubaud, P. Odier, A. Venaille 2018. Instabilities of internal wave beams -  Annual Review of Fluid Mechanics 2018 .pdf
Review the peculiar effects of non-linearities on internal wave beams, including streaming and triadic resonant instability.
A.18 P. Delplace, J.B. Marston, A. Venaille 2017. Topological origin of equatorial waves - Science .pdf
Shallow water waves present topological singularities as a consequence of Earth rotation  breaking time-reversal symmetry. This can be related to the emergence of two unidirectional trapped modes along the equator, the celebrated Kelvin and Yanai waves.
A.17 Y. Yasuda, F. Bouchet, A. Venaille 2017. A new Interpretation of vortex-split stratospheric sudden warmings in terms of equilibrium statistical mechanics - Journal of the Atmospheric Science .pdf
 Spontaneous splitting of the polar vortex as an abrupt transition from a quasi-stationary cyclonic state to an anticyclonic equilibrium state when an effective topography is varied.
A.16 A. Venaille, L. Gostiaux, J. Sommeria, 2016. A statistical mechanics approach to mixing in stratified fluids - Journal of Fluid Mechanics   .pdf
Uses statistical mechanics to predict how much mixing occurs when a given amount of energy is injected into a stratified fluid.
A.15 A. Renaud, A. Venaille, F. Bouchet, 2016. Equilibrium statistical mechanics and energy partition for the shallow water model - Journal of Statistical Physics  .pdf
Full computation of statistical equilibrium states of the shallow water model using large deviation theory. Predicts the concommitant emergence of a large scale vortical flow and energy loss towards small scales on the form of inertia-gravity waves.
A.14 A. Venaille, T. Dauxois, S. Ruffo, 2015. Violent relaxation in two-dimensional flows with varying interactions - Physical Review E - Rapid Communication  .pdf
Shows that the range of interaction between fluid particles plays a crucial role in selecting the large scale flow topology during the relaxation of an unstable initial state towards equilibrium.
A.13 A. Venaille, L.-P. Nadeau, G. K. Vallis, 2014. Ribbon turbulence -  Physics of Fluids, selected as Research Highlights.pdf
Ribbons are surface intensified jets in the large bottom friction limit of geostrophic turbulence. Their dynamics results from a competition between baroclinic instability and the relaxation toward an equilibrium state.
Movies:  weak friction   intermediate friction   large friction
A.12 G. Bordes, A. Venaille, S. Joubaud, P. Odier, T. Dauxois, 2012. Experimental observation of strong mean flows generated by internal gravity waves - Physics of Fluids   .pdf
Shows that a monochromatic wave beam propagating in a stratified viscous fluid induces a robust and strong jet flowing outward the wave generator.
A.11 A. Venaille,  2012. Bottom-trapped currents as statistical equilibrium states above topography anomalies - Journal of Fluid Mechanics  .pdf
Shows that in presence of a sufficiently large topographic bump, an initial surface-intensified random velocity field evolves towards a bottom-trapped anticyclonic mean flow.
A.10 A. Venaille, G. K. Vallis, S.M. Griffies, 2012. The catalytic role of beta effect in barotropization processes - Journal of Fluid Mechanics  .pdf
Shows that the presence of planetary vorticity gradients favors the tendency to spread the energy on the vertical in stratified quasi-geostrophic turbulent flows, and that statistical mechanics arguments account for this phenomenon.
A.9 F. Bouchet, A. Venaille, 2012. Statistical mechanics of  two-dimensional and geophysical flows  - Physics Reports  .pdf 
Review paper with emphasis on Robert-Sommeria-Miller equilibrium theory. Former statistical approaches are also discussed, as well as current developments in out of equilibrium context.
A.8 A. Venaille, G.K. Vallis, K.S. Smith, 2011. Baroclinic turbulence in the ocean: analysis with primitive equation and quasi-geostrophic simulations - Journal of Physical Oceanography  .pdf 
Tests the hypothesis that oceanic eddies result from local baroclinic instabilities, and examines the factors determining their distribution, length scale, magnitude and structure.
A.7 A. Venaille, J. Le Sommer, J.-M. Molines, B. Barnier, 2011. Stochastic variability of large scale oceanic flows above topography anomalies - Geophysical Research Letters  .pdf , compte rendu sur le site de l'insu
A stochastic mechanism is proposed to interpret the dynamics of eddy-driven recirculations above closed contours of bottom topography. This may account for the observed low frequency variability of the Zapiola anticyclone.
A.6 A. Venaille, F. Bouchet, 2011. Oceanic rings and jets as statistical equilibrium states  - Journal of Physical Oceanography  .pdf  
Using statistical mechanics arguments, oceanic rings are interpreted as "bubbles" of homogenized potential vorticity. It may provide an explanation for their ubiquity, their shape, and their drift.
A.5 A. Venaille, F. Bouchet, 2011. Solvable phase diagrams and ensemble inequivalence for two-dimensional and geophysical turbulent flows - Journal of Statistical Physics .pdf 
Companion paper of PRL09 below. Discusses symmetry breaking associated with the generic occurrence of ensemble inequivalence, and the surprising effect of the Rossby radius of deformation (a screening length scale).
A.4 A. Venaille, F. Bouchet, 2009. Statistical Ensemble Inequivalence and Bicritical Points for Two-Dimensional Flows and Geophysical Flows - Physical Review Letters  .pdf
It is shown that statistical ensemble inequivalence and negative specific heat occur for a wide class of models and parameters, including Fofonoff flows, and are related to previously observed phase transitions in the flow topology. 
A.3 A. Venaille, J. Sommeria, 2008. Is mixing a self-convolution process ?  - Physical Review Letters  .pdf
Experimental tests of the self-convolution model for mixing of a passive tracer. It is shown that the model is doing well at sufficiently late stage of mixing. 
A.2 A. Venaille, J. Sommeria, 2007. A dynamical equation for the distribution of a scalar advected by turbulence. - Physics of Fluids .pdf
Provides phenomenological arguments showing that the mixing of a passive tracer through turbulent cascades may be represented as a succession of self-convolutions of the tracer distribution.
A.1 A. Venaille, P. Varona, M.I. Rabinovich, 2005.  Synchronization and coordination of sequences in two neural ensembles - Physical Review E   .pdf
Synchronization properties emerging from the coupling of two chaotic systems are investigated. This illustrates how a mollusk can scan randomly an area to find a prey, while keeping some efficiency in swimming. 

    Conference proceedings and book chapters

C.6 F. Bouchet, A. Venaille 2016. Zonal flows as statistical equilibria- accepted for for Zonal Jets, Editor B. Galperin, P. Read, CUP  .pdf
Review showing that equilibrium states on a beta plane or a sphere are usually zonal or quasi-zonal, and that increasing the energy leads to bifurcations breaking the zonal symmetry.
C.5 F. Bouchet, A. Venaille 2012. Application of equilibrium statistical mechanics to atmospheres and oceans  - Peyresq lectures Volume 3 .pdf
Review  geophysical applications of equilibrium statistical mechanics: Jovian Great Red Spot, oceanic rings and jets, barotropization, bottom-trapped flows.
C.4 A. Venaille, F. Bouchet, 2012. Are rings and jets statistical equilibrium states ?  - Journal of Physics: Conference Series, ETC13 .pdf
Discuss 1.5 layer quasi-geostrophic turbulence in oceanic context, in the framework of Robert-Sommeria-Miller theory.
C.3 A. Venaille, J. Sommeria, 2010.  Modeling mixing in two-dimensional turbulence and stratified fluidsIUTAM symposium on Turbulence in the Atmosphere and Oceans, Editor D. Dritschel .pdf
Presents a model for the temporal evolution of the buoyancy distribution at a given depth in a stratified fluid. The model is built in order to satisfy basic physical properties (conservation laws).
C.2  F. Bouchet, J. Barré, A. Venaille, 2008. Equilibrium and out-of-equilibrium phase transitions in systems with long range interactions and in 2D flows AIP conference proceedings (Assisi 07) .pdf
Review statistical mechanics of long-range interating systems with application to two-dimensional turbulent flows.
C.1 A. Venaille., J. Sommeria, 2007.  Modeling mixing in two-dimensional turbulence and stratified fluidsCFM 07 .pdf
Discuss possible pdf methods for mixing in stratified fluids.


2017 Interdisciplinary workshop on topological phenomena,
Lyon, 8-10 Nov 2017, with A. Amo, M. Bellec and P. Delplace
2017 Summer school on fundamental aspects of turbulent flows in climate dynamics
Ecole de Physique des Houches, Jul 31-Aug 25 2017, with F. Bouchet and T. Schneider
2015 NewWawe: new challenges in internal wave dynamics,
Lyon, 14-16 Oct 2015, with L. Gostiaux and C. Muller
2013 Geoturb: numerical modeling and theoretical challenges in atmosphere and ocean turbulence
Lyon, 2-4 Oct 2013, with  F. Bouchet


2012-now CR CNRS, Laboratoire de physique, ENS-Lyon, 
2011-2012 Post-doc,  Laboratoire de physique, ENS-Lyon
Post-doc at Princeton University, GFDL-AOS
PhD Thesis at LEGI  (Grenoble) and INLN (Nice)
ENS-Lyon, Physics

Last change: January 2019