419 citations · 805 across the 14 of their papers we have counts for
8 papers · 1 filter
Acceleration of heavy and light particles in turbulence: comparison between experiments and direct numerical simulations
R. Volk, E. Calzavarini, G. Verhille +4
We compare experimental data and numerical simulations for the dynamics of inertial particles with finite density in turbulence. In the experiment, bubbles and solid particles are…
Polymer and surface roughness effects on the drag crisis for falling spheres
Nicolas Lyotard, Woodrow Shew, Lydéric Bocquet +1
We make time resolved velocity measurements of steel spheres in free fall through liquid using a continuous ultrasound technique. We explore two different ways to induce large chan…
Measurement of particle and bubble accelerations in turbulence
Romain Volk, Nicolas Mordant, Gautier Verhille +1
We use an extended laser Doppler technique to track optically the velocity of individual particles in a high Reynolds number turbulent flow. The particle sizes are of the order of…
Subcritical dynamo bifurcation in the Taylor Green flow
Yannick Ponty, Jean-Phillipe Laval, Berengere Dubrulle +2
We report direct numerical simulations of dynamo generation for flow generated using a Taylor-Green forcing. We find that the bifurcation is subcritical, and show its bifurcation d…
Magnetic induction in a turbulent flow of liquid sodium: mean behaviour and slow fluctuations
F. Ravelet, R. Volk, A. Chiffaudel +10
We study the flow response to an externally imposed homogeneous magnetic field in a turbulent swirling flow of liquid sodium -- the VKS2 experiment in which magnetic Reynolds numbe…
Dynamo action in cylindrical annulus
R. Volk, P. Odier, J. -F. Pinton
We study numerically the induction mechanisms generated from an array of helical motions distributed along a cylinder. Our flow is a very idealized geometry of the columnar structu…