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Showing 2015 · physics.flu-dynShow all

14 papers · 2 filters

physics.flu-dyn2015★ 15 cited

Stochastic dynamics of particles trapped in turbulent flows

N Machicoane, M López-Caballero, L Fiabane +4

The long time dynamics of large particles trapped in two inhomogeneous turbulent shear flows is studied experimentally. Both flows present a common feature, a shear region that sep…

physics.flu-dyn2015★ 23 cited

Lagrangian velocity and acceleration correlations of large inertial particles in a closed turbulent flow

Nathanaël Machicoane, Romain Volk

We investigate the response of large inertial particle to turbulent fluctuations in a inhomogeneous and anisotropic flow. We conduct a Lagrangian study using particles both heavier…

physics.flu-dyn2015★ 22 cited

Diffusiophoresis at the macroscale

Cyril Mauger, Romain Volk, Nathanael Machicoane +4

Diffusiophoresis, a ubiquitous phenomenon that induces particle transport whenever solute concentration gradients are present, was recently observed in the context of microsystems…

physics.flu-dyn2015★ 37 cited

Interplay of waves and eddies in rotating stratified turbulence and the link with kinetic-potential energy partition

Raffaele Marino, Duane Rosenberg, Corentin Herbert +1

The interplay between waves and eddies in stably stratified rotating flows is investigated by means of world-class direct numerical simulations using up to grid points. St…

physics.flu-dyn2015★ 52 cited

A dissipative random velocity field for fully developed fluid turbulence

Rodrigo M. Pereira, Christophe Garban, Laurent Chevillard

We investigate the statistical properties, based on numerical simulations and analytical calculations, of a recently proposed stochastic model for the velocity field of an incompre…

physics.flu-dyn2015★ 44 cited

Waves and vortices in the inverse cascade regime of stratified turbulence with or without rotation

Corentin Herbert, Raffaele Marino, Duane Rosenberg +1

We study the partition of energy between waves and vortices in stratified turbulence, with or without rotation, for a variety of parameters, focusing on the behavior of the waves a…

physics.flu-dyn2015★ 23 cited

Simultaneous temperature and velocity Lagrangian measurements in turbulent thermal convection

O. Liot, F. Seychelles, F. Zonta +6

We report joint Lagrangian velocity and temperature measurements in turbulent thermal convection. Measurements are performed using an improved version (extended autonomy) of the ne…

physics.flu-dyn2015★ 137 cited

Collisional Aggregation due to Turbulence

Alain Pumir, Michael Wilkinson

Collisions between particles suspended in a fluid play an important role in many physical processes. As an example, collisions of microscopic water droplets in clouds are a necessa…

physics.flu-dyn2015★ 48 cited

Computing transition rates for the 1-D stochastic Ginzburg--Landau--Allen--Cahn equation for finite-amplitude noise with a rare event algorithm

Joran Rolland, Freddy Bouchet, Eric Simonnet

In this paper we compute and analyse the transition rates and duration of reactive trajectories of the stochastic 1-D Allen-Cahn equations for both the Freidlin-Wentzell regime (we…

physics.flu-dyn2015★ 34 cited

Understanding and modeling turbulent fluxes and entrainment in a gravity current

P. Odier, J. Chen, R. E. Ecke

We present an experimental study of the mixing processes in a gravity current flowing on an inclined plane. The turbulent transport of momentum and density can be described in a ve…

physics.flu-dyn2015★ 10 cited

Equilibrium statistical mechanics and energy partition for the shallow water model

Antoine Renaud, Antoine Venaille, Freddy Bouchet

The aim of this paper is to use large deviation theory in order to compute the entropy of macrostates for the microcanonical measure of the shallow water system. The main predictio…

physics.flu-dyn2015★ 82 cited

Dynamo regimes and transitions in the VKS experiment

M. Berhanu, G. Verhille, J. Boisson +14

The Von K{á}rm{á}n Sodium experiment yields a variety of dynamo regimes, when asymmetry is imparted to the flow by rotating impellers at different speed F1 and F2. We show that as…

physics.flu-dyn2015★ 66 cited

New wave generation

Matthieu J. Mercier, Denis Martinand, Manikandan Mathur +3

We present the results of a combined experimental and numerical study of the generation of internal waves using the novel internal wave generator design of Gostiaux et al. (2007).…

physics.flu-dyn2015★ 30 cited

Three-dimensional foam flow resolved by fast X-ray tomographic microscopy

Christophe Raufaste, Benjamin Dollet, Kevin Mader +2

Thanks to ultra fast and high resolution X-ray tomography, we managed to capture the evolution of the local structure of the bubble network of a 3D foam flowing around a sphere. As…