The effect of rotational shear on granular discharge rates

The effect of rotational shear on granular discharge rates

The mass flow rate of a packed granular column subject to rotational shear discharging though an aperture is investigated computationally. We show that the flow rate increases in response to the applied shear. This increase obeys a power-law relation based on the rotational Froude number, Fr = L ω 2...

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Veröffentlicht in:Physics of fluids (1994) 2010-07, Vol.22 (7), p.071701-071701-4
Hauptverfasser: Hilton, J. E., Cleary, P. W.
Format: Artikel
Sprache:eng
Schlagworte:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Granular solids
Material form
Physics
Rheology
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Zusammenfassung:The mass flow rate of a packed granular column subject to rotational shear discharging though an aperture is investigated computationally. We show that the flow rate increases in response to the applied shear. This increase obeys a power-law relation based on the rotational Froude number, Fr = L ω 2 / g , where ω is the angular rotation speed and L is a system length scale. The exponent of this relation is found to be independent of the particle diameter, intergrain friction, and the geometry of the setup.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.3459155