14.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Université de RennesFR408 papers
- Centre National de la Recherche ScientifiqueFR296 papers
- Institut de recherche mathématique de RennesFR189 papers
- Institut de Physique de RennesFR150 papers
- Université Paris DiderotFR79 papers
- Observatoire de ParisFR77 papers
- Université Paris-SudFR73 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR70 papers
- Observatoire de la Côte d’AzurFR70 papers
- University of WarsawPL69 papers
- Australian National UniversityAU67 papers
- University of Rome Tor VergataIT66 papers
30 papers · 1 filter
Avalanche precursors in a frictional model
Axelle Amon, Baptiste Blanc, Jean-Christophe Géminard
We present a one-dimensional numerical model based on elastically coupled sliders on a frictional incline of variable tilt. This very simple approach makes possible to study the pr…
Spatially-resolved measurements of micro-deformations in granular materials using DWS
Axelle Amon, Alesya Mikhailovskaya, Jérôme Crassous
This article is a tutorial on the practical implementation of a method of measurement of minute deformations based on multiple scattering. This technic has been recently developed…
Grain-scale Modeling and Splash Parametrization for Aeolian Sand Transport
Marc Lämmel, Kamil Dzikowski, Luc Oger +2
The collision of a spherical grain with a granular bed is commonly parametrized by the splash function, which provides the velocity of the rebounding grain and the velocity distrib…
Pressure dependent friction on granular slopes close to avalanche
Jérôme Crassous, Antoine Humeau, Samuel Boury +1
We investigate the sliding of objects on an inclined granular surface close to the avalanche threshold. Our experiments show that the stability is driven by the surface deformation…
Eshelby inclusions in granular matter: theory and simulations
Sean Mcnamara, Jérôme Crassous, Axelle Amon
We present a numerical implementation of an active inclusion in a granular material submitted to a biaxial test. We discuss the dependence of the response to this perturbation on t…
Spatial repartition of local plastic processes in different creep regimes in a granular material
A Pons, T Darnige, Jérôme Crassous +2
Granular packings under constant shear stress display below the Coulomb limit, a logarithmic creep dynamics. However the addition of small stress modulations induces a linear creep…
Hiding in plain view: Colloidal self-assembly from polydisperse populations
Bernard Cabane, Joaquim Li, Franck Artzner +5
We report small-angle x-ray scattering (SAXS) experiments on aqueous dispersions of colloidal silica with a broad monomodal size distribution (polydispersity 18%, size 8 nm). Over…
Mechanical fluctuations suppress the threshold of soft-glassy solids : the secular drift scenario
Adeline Pons, Axelle Amon, Thierry Darnige +2
We propose a dynamical mechanism leading to the fluidization of soft-glassy amorphous mate-rial driven below the yield-stress by external mechanical fluctuations. The model is base…
A model for the onset of oscillations near the stopping angle in an inclined granular flow
Danielle Tan, Patrick Richard, James T. Jenkins
We propose an explanation for the onset of oscillations seen in numerical simulations of dense, inclined flows of inelastic, frictional spheres. It is based on a phase transition b…
Confined packings of frictionless spheres and polyhedra
Jean-François Camenen, Yannick Descantes, Patrick Richard
By means of numerical simulations, we study the influence of confinement on three-dimensional random close packed (RCP) granular materials subject to gravity. The effects of grain…
Liquid meniscus friction on a wet plate: Bubbles, lamellae and foams
Isabelle Cantat
Many microfluidics devices, coating processes or diphasic flows involve the motion of a liquid meniscus on a wet wall. This motion induces a specific viscous force, that exhibits a…
Effect of confinement on dense packings of rigid frictionless spheres and polyhedra
Jean-François Camenen, Yannick Descantes, Patrick Richard
We study numerically the influence of confinement on the solid fraction and on the structure of three-dimensional random close packed (RCP) granular materials subject to gravity. T…
Experimental Investigation of Plastic Deformations Before Granular Avalanche
Axelle Amon, Roman Bertoni, Jérôme Crassous
We present an experimental study of the deformation inside a granular material that is progressively tilted. We investigate the deformation before the avalanche with a spatially re…
Silo collapse under granular discharge
G. Gutiérrez, C. Colonnello, P. Boltenhagen +4
We investigate, at a laboratory scale, the collapse of cylindrical shells of radius and thickness induced by a granular discharge. We measure the critical filling height fo…
On the relevance of numerical simulations to booming sand
Patrick Richard, Sean Mcnamara, Merline Tankeo
We have performed a simulation study of 3D cohesionless granular flows down an inclined chute. We find that the oscillations observed in [L.E. Silbert, Phys. Rev. Lett., 94, 098002…
Liquid films with high surface modulus moving in tubes: dynamic wetting film and jumpy motion
Isabelle Cantat, Benjamin Dollet
We investigate the motion through a wet tube of transverse soap films, or lamellae, of high surface dilatationnal modulus. Combining local thickness and velocity measurements in th…
Dense granular flow around a penetrating object: Experiments and hydrodynamic model
Antoine Seguin, Yann Bertho, Philippe Gondret +1
We present in this Letter experimental results on the bidimensional flow field around a cylinder penetrating into dense granular matter together with drag force measurements. A hyd…
Sphere penetration by impact in a granular medium: A collisional process
Antoine Seguin, Yann Bertho, Philippe Gondret +1
The penetration by a gravity driven impact of a solid sphere into a granular medium is studied by two-dimensional simulations. The scaling laws observed experimentally for both the…
Local description of the two-dimensional flow of foam through a contraction
Benjamin Dollet
The 2D flow of a foam confined in a Hele-Shaw cell through a contraction is investigated. Its rheological features are quantified using image analysis, with measurements of the ela…
Continuous Paranematic-to-Nematic Ordering Transitions of Liquid Crystals in Tubular Silica Nanochannels
Andriy V. Kityk, Matthias Wolff, Klaus Knorr +3
The optical birefringence of rod-like nematogens (7CB, 8CB), imbibed in parallel silica channels with 10 nm diameter and 300 micrometer length, is measured and compared to the ther…
Rich polymorphism of a rod-like liquid crystal (8CB) confined in two types of unidirectional nanopores
Régis Guégan, Denis Morineau, Ronan Lefort +5
We present a neutron and X-rays scattering study of the phase transitions of 4-n-octyl-4'-cyanobiphenyl (8CB) confined in unidirectional nanopores of porous alumina and porous sili…
Experimental growth law for bubbles in a "wet" 3D liquid foam
Jérôme Lambert, Rajmund Mokso, Isabelle Cantat +4
We used X-ray tomography to characterize the geometry of all bubbles in a liquid foam of average liquid fraction and to follow their evolution, measuring the norm…
Decorated vertices with 3-edged cells in 2D foams: exact solutions and properties
Marco Mancini, Christophe Oguey
The energy, area and excess energy of a decorated vertex in a 2D foam are calculated. The general shape of the vertex and its decoration are described analytically by a reference p…
Structure and relaxation processes of an anisotropic molecular fluid confined into 1D nanochannels
Ronan Lefort, Denis Morineau, Régis Guégan +3
Structural order parameters of a smectic liquid crystal confined into the columnar form of porous silicon are studied using neutron scattering and optical spectroscopic techniques.…