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Communication Dans Un Congrès Année : 2009

Convective Flow in a Horizontally Vibrated 3D Granular Packing

Résumé

We report experimental observations of a horizontally vibrated granular medium made out of sand grains. For large enough acceleration, two counter-rotating convection rolls appear in the upper part of the granular packing, whereas the bed remains unperturbed in the lower part. For increasing acceleration, the free surface exhibits different shapes: slight dome, two ridges and single roof. A quantitative characterization is performed by mean of PIV and image analysis. It shows that both relaxed and dynamic densities present a maximum at =3.8 and that the measured thickness of the fluidized region scales with a square root law (as a function of the dimensionless acceleration). In the discussion, a convection mechanism is proposed, as well as an analogy with classical Newtonian fluids.
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Dates et versions

hal-00409723 , version 1 (12-08-2009)

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  • HAL Id : hal-00409723 , version 1

Citer

Ahmed Raihane, Olivier Bonnefoy, Sébastien Nadler, Jean-Louis Gelet, Jean-Marc Chaix, et al.. Convective Flow in a Horizontally Vibrated 3D Granular Packing. Powders and Grains 2009: 6th International Conference on Micromechanics of Granular Media, Jul 2009, Golden, United States. pp.721-724. ⟨hal-00409723⟩
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