Simulation study of the convection cells in a vibrated granular bed

The discrete element method (DEM) is employed to study the convection cells of glass beads in a two-dimensional vibrated granular bed. The flow pattern and velocity vectors are consistent with the former experimental results. The solid fractions and the granular temperatures are studied with differe...

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Bibliographic Details
Published in:Chemical engineering science 2000-09, Vol.55 (18), p.3627-3637
Main Authors: Yang, S.C, Hsiau, S.S
Format: Article
Language:English
Subjects:
Convection cell
Cross-disciplinary physics: materials science
rheology
DEM
Exact sciences and technology
Granular solids
Granular temperature
Material form
Physics
Rheology
Vibrated bed
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Summary:The discrete element method (DEM) is employed to study the convection cells of glass beads in a two-dimensional vibrated granular bed. The flow pattern and velocity vectors are consistent with the former experimental results. The solid fractions and the granular temperatures are studied with different vibration acceleration and vibration velocity. A power-law relation exists between the convection flow rate and the dimensionless vibration velocity. The mass flow rate was found to increase with the bed velocity in a power-law relation, J∝ V 2.3 b , and decrease with the bed velocity in a power-law relation, J∝ V −0.4 b , with a fixed vibration acceleration.
ISSN:0009-2509
1873-4405
DOI:10.1016/S0009-2509(00)00040-3