210 citations · 799 across the 14 of their papers we have counts for
14 papers
Numerical study of extreme mechanical force exerted by a turbulent flow on a bluff body by direct and rare-event sampling techniques
Thibault Lestang, Freddy Bouchet, Emmanuel Lévêque
This study investigates, by means of numerical simulations, extreme mechanical force exerted by a turbulent flow impinging on a bluff body, and examines the relevance of two distin…
Importance of fluid inertia for the orientation of spheroids settling in turbulent flow
Muhammad Zubair Sheikh, Kristian Gustavsson, Diego Lopez +4
How non-spherical particles orient as they settle in a flow has important practical implications in a number of scientific and engineering problems. In a quiescent fluid, a slowly…
Statistical model for the orientation of non-spherical particles settling in turbulence
K. Gustavsson, J. Jucha, A. Naso +3
The orientation of small anisotropic particles settling in a turbulent fluid determines some essential properties of the suspension. We show that the orientation distribution of sm…
Introduction of longitudinal and transverse Lagrangian velocity increments in homogeneous and isotropic turbulence
Emmanuel Leveque, Aurore Naso
Based on geometric considerations, longitudinal and transverse Lagrangian velocity increments are introduced as components along, and perpendicular to, the displacement of fluid pa…
Multiple collisions in turbulent flows
Michel Voßkuhle, Emmanuel Lévêque, Michael Wilkinson +1
In turbulent suspensions, collision rates determine how rapidly particles coalesce or react with each other. To determine the collision rate, many numerical studies rely on the 'Gh…
Prevalence of the sling effect for enhancing collision rates in turbulent suspensions
Michel Voßkuhle, Alain Pumir, Emmanuel Lévêque +1
Turbulence facilitates collisions between particles suspended in a turbulent flow. Two effects have been proposed which can enhance the collision rate at high turbulence intensitie…
A phenomenological theory of Eulerian and Lagrangian velocity fluctuations in turbulent flows
Laurent Chevillard, Bernard Castaing, Alain Arneodo +3
A phenomenological theory of the fluctuations of velocity occurring in a fully developed homogeneous and isotropic turbulent flow is presented. The focus is made on the fluctuation…
Local and nonlocal pressure Hessian effects in real and synthetic fluid turbulence
Laurent Chevillard, Emmanuel Leveque, Francesco Taddia +3
The Lagrangian dynamics of the velocity gradient tensor A in isotropic and homogeneous turbulence depend on the joint action of the self-streching term and the pressure Hessian. Ex…
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…
Implicit hydrodynamic simulations of stellar interiors
Maxime Viallet, Isabelle Baraffe, Cedric Mulet-Marquis +4
We report on the development of an implicit multi-D hydrodynamic code for stellar evolution. We present two test-cases relevant for the first scientific goal of the code: the simul…
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…
Acceleration statistics of finite-sized particles in turbulent flow: the role of Faxen forces
Enrico Calzavarini, Romain Volk, Mickael Bourgoin +3
The dynamics of particles in turbulence when the particle-size is larger than the dissipative scale of the carrier flow is studied. Recent experiments have highlighted signatures o…
Universal intermittent properties of particle trajectories in highly turbulent flows
ICTR, :, A. Arneodo +27
We present a collection of eight data sets, from state-of-the-art experiments and numerical simulations on turbulent velocity statistics along particle trajectories obtained in dif…
Intermittency of velocity time increments in turbulence
L. Chevillard, S. G. Roux, E. Leveque +3
We analyze the statistics of turbulent velocity fluctuations in the time domain. Three cases are computed numerically and compared: (i) the time traces of Lagrangian fluid particle…