Granular hydrodynamics and density wave regimes in a vertical chute experiment
Laboratoire des Milieux Désordonnés et Hétérogènes,
UMR7603 Université Pierre et Marie Curie - Boîte 86
4, Place Jussieu, 75005 Paris, France
Accepted: 27 April 2000
We report experiments on grains falling in a bidimensional vertical column. We identify a steady flow regime and, for narrow openings, a regime of density waves. The density, velocity and temperature fields are measured and compared with the prediction of a granular hydrodynamics theory. We find a good qualitative agreement for weakly dissipative particles but for the more dissipative ones, we evidence a new regime of momentum and energy transport characterized by a clogging dynamics.
PACS: 05.20.Dd – Kinetic theory / 83.70.Fn – Granular solids / 47.50.+d – Non-Newtonian fluid flows
© EDP Sciences, 2000