LEMAIRE , Elisabeth

International audience

International audience

International audience

National audience

International audience

International audience

International audience

We report experiments on a magnetic cohesive granular material made of steel spheres in the millimeter range. A magnetic field magnetizes the spheres, so that an interaction force between grains appears. A rotating magnetic field is applied parallel to plane of the quasi-two-dimensional cell containing the spheres so that only the time averaged...

International audience

National audience

Les exp eriences qui sont pr esent ees ici concernent la s edimentation d'une sph ere dense de diam etre millim etrique dans une suspension isodense de particules plus petites dispers ees dans un uide new- tonien, le tout etant plac e dans une cellule de Couette d'axe vertical mont ee sur un rh eom etre. La vitesse de s edimentation...

International audience

The pressure-driven flow of a suspension of spinning particles in a rectangular channel is studied using an acoustic method. The suspension is made of insulating particles (PMMA) dispersed in a slightly conducting oil ( Ugilec + Dielec) and is subjected to a DC electric field. In such a case, the particles are polarized in the direction...

National audience

This paper reports experiments on the shear transient response of concentrated non-Brownian suspensions. The shear viscosity of the suspensions is measured using a wide-gap Couette rheometer equipped with a Particle Image Velocimetry (PIV) device that allows measuring the velocity field. The suspensions made of PMMA particles (31µm in diameter)...

In this paper, we report experimental evidence of Lorenz chaos for the Quincke rotor dynamics. We study the angular motion of an insulating cylinder immersed in slightly conducting oil and submitted to a direct current electric field. The simple equations which describe the dynamics of the rotor are shown to be equivalent to the Lorenz...

International audience

International audience

No description

Les exp eriences qui sont pr esent ees ici concernent la s edimentation d'une sph ere dense de diam etre millim etrique dans une suspension isodense de particules plus petites dispers ees dans un uide new- tonien, le tout etant plac e dans une cellule de Couette d'axe vertical mont ee sur un rh eom etre. La vitesse de s edimentation...

International audience

National audience

International audience

We present an experimental approach used to measure both normal stress differences and the particle phase contribution to the normal stresses in suspensions of non-Brownian hard spheres. The methodology consists of measuring the radial profile of the normal stress along the velocity gradient direction in a torsional flow between two parallel...

Poster : Rhéologie locale des suspensions concentrées GFR 44 Strasbourg