Vibration induced airflow through granular beds and density-dependent segregation

G. Gutiérrez, L.I. Reyes, I. Sánchez, K. Rodríguez, V. Idler and R. Paredes V

Physica A: Statistical Mechanics and its Applications, 2005, vol. 356, issue 1, 83-87

Abstract: We describe a quantitative model for air-driven fluidization in a vertically vibrated granular system and use experimental results and simulations to evaluate it. The model involves a mechanism for vibrationally induced interstitial gas flow [L.I. Reyes, I. Sánchez, G. Gutiérrez, Physica A, cond-mat/0502376, in press] that can generate fluid-like states that produce density-dependent segregation of large objects, through a buoyancy force. A criterion for the onset of fluidization analogous to that of a gas-fluidized static bed is used. We calculate the vertical displacement of a large sphere occurring within one period of oscillation, in specific parts of the cycle where the granular system behaves like a regular fluid.

Keywords: Granular; Fluidization; Segregation; Buoyancy (search for similar items in EconPapers)
Date: 2005
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:356:y:2005:i:1:p:83-87

DOI: 10.1016/j.physa.2005.05.017

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