Sinking of light intruders in a shaken granular bed
Issue Date: 
23-Jun-2010
Citation: 
Iván, S. (Sánchez); Gustavo, G. (Gutierrez); Zuriguel, I. (Iker); et al. "Sinking of light intruders in a shaken granular bed". En . , 2010-06-23,
Abstract
We present an experimental study of the displacement of a light intruder immersed in a vibrated granular bed. Using high speed video we resolve the motion, during one cycle of oscillation, of a cylindrical object inside a Plexiglas box partially filled with grains. We report experimental evidence that, in the absence of convection, at least two forces are behind the intruder’s motion: an air drag force—due to the airflow through the granular bed—and a buoyancy force produced by an air-mediated granular fluid.

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