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Simulation study of the effect of wall roughness on the dynamics of granular flows in rotating semicylindrical chutes
Author(s) -
Shirsath Sushil S.,
Padding Johan T.,
Kuipers J. A. M. Hans,
Clercx Herman J. H.
Publication year - 2015
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14828
Subject(s) - discrete element method , particle (ecology) , particle image velocimetry , mechanics , surface roughness , surface finish , rotation (mathematics) , geometry , flow (mathematics) , particle tracking velocimetry , base (topology) , velocimetry , materials science , physics , geology , mathematics , composite material , turbulence , mathematical analysis , oceanography
A discrete element model (DEM) is used to investigate the behavior of spherical particles flowing down a semicylindrical rotating chute. The DEM simulations are validated by comparing with particle tracking velocimetry results of spherical glass particles flowing through a smooth semicylindrical chute at different rotation rates of the chute. The DEM model predictions agree well with experimental results of surface velocity and particle bed height evolution. The validated DEM model is used to investigate the influence of chute roughness on the flow behavior of monodisperse granular particles in rotating chutes. To emulate different base roughnesses, a rough base is constructed out of a square close packing of fixed spherical particles with a diameter equal to, smaller, or larger than the flowing particles. Finally, the DEM model is used to study segregation in a binary density mixture for different degrees of roughness of the chute. © 2015 American Institute of Chemical Engineers AIChE J, 61: 2117–2135, 2015