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Showing 2010 · physics.flu-dynShow all

10 papers · 2 filters

physics.flu-dyn2010★ 68 cited

Rotational intermittency and turbulence induced lift experienced by large particles in a turbulent flow

Robert Zimmermann, Yoann Gasteuil, Mickael Bourgoin +3

The motion of a large, neutrally buoyant, particle, freely advected by a turbulent flow is determined experimentally. We demonstrate that both the translational and angular acceler…

physics.flu-dyn2010

Longitudinal and Transverse structure functions in high Reynolds-number turbulence

Rainer Grauer, Holger Homann, Jean-Francois Pinton

Using exact relations between velocity structure functions (Hill, Hill and Boratav, and Yakhot) and neglecting pressure contributions in a first approximation, we obtain a closed s…

physics.flu-dyn2010★ 6 cited

Two-Point Vorticity Statistics in the Inverse Turbulent Cascade

R. Friedrich, M. Voßkuhle, O. Kamps +1

We present a statistical analysis of the two-point vorticity probability density of the vorticity field generated in the inverse cascade of stationary two-dimensional turbulence.

physics.flu-dyn2010★ 55 cited

Solvable phase diagrams and ensemble inequivalence for two-dimensional and geophysical turbulent flows

Antoine Venaille, Freddy Bouchet

Using explicit analytical computations, generic occurrence of inequivalence between two or more statistical ensembles is obtained for a large class of equilibrium states of two-dim…

physics.flu-dyn2010★ 52 cited

Tracking the dynamics of translation and absolute orientation of a sphere in a turbulent flow

Robert Zimmermann, Yoann Gasteuil, Mickael Bourgoin +3

We study the 6-dimensional dynamics -- position and orientation -- of a large sphere advected by a turbulent flow. The movement of the sphere is recorded with 2 high-speed cameras.…

physics.flu-dyn2010★ 46 cited

Impact of trailing wake drag on the statistical properties and dynamics of finite-sized particle in turbulence

Enrico Calzavarini, Romain Volk, Emmanuel Leveque +2

We study by means of an Eulerian-Lagrangian model the statistical properties of velocity and acceleration of a neutrally-buoyant finite-sized particle in a turbulent flow statistic…

physics.flu-dyn2010★ 16 cited

Statistical mechanics of Fofonoff flows in an oceanic basin

A. Naso, P. H. Chavanis, B. Dubrulle

We study the minimization of potential enstrophy at fixed circulation and energy in an oceanic basin with arbitrary topography. For illustration, we consider a rectangular basin an…

physics.flu-dyn2010★ 31 cited

On the origin of intermittency in wave turbulence

Eric Falcon, S. G. Roux, Claude Laroche

Using standard signal processing tools, we experimentally report that intermittency of wave turbulence on the surface of a fluid occurs even when two typical large-scale coherent s…

physics.flu-dyn2010★ 18 cited

Statistical mechanics of Beltrami flows in axisymmetric geometry: Equilibria and bifurcations

Aurore Naso, Simon Thalabard, Gilles Collette +2

We characterize the thermodynamical equilibrium states of axisymmetric Euler-Beltrami flows. They have the form of coherent structures presenting one or several cells. We find the…

physics.flu-dyn2010★ 89 cited

Dynamics of inertial particles in a turbulent von Karman flow

Romain Volk, Enrico Calzavarini, Emmanuel Leveque +1

We study the dynamics of neutrally buoyant particles with diameters varying in the range [1, 45] in Kolmogorov scale units (eta) and Reynolds numbers based on Taylor scale between…