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Title: Size-induced axial band structure and directional flow of a ternary-size granular material in a 3-D horizontal rotating drum
Authors: Yang, Shiliang
Sun, Yuhao
Ma, Honghe
Chew, Jia Wei
Keywords: Musical Instruments
Fluid Flows
Issue Date: 2018
Source: Yang, S., Sun, Y., Ma, H., & Chew, J. W. (2018). Size-induced axial band structure and directional flow of a ternary-size granular material in a 3-D horizontal rotating drum. Physics of Fluids, 30(5), 053302-. doi:10.1063/1.5022861
Series/Report no.: Physics of Fluids
Abstract: Differences in the material property of the granular material induce segregation which inevitably influences both natural and industrial processes. To understand the dynamical segregation behavior, the band structure, and also the spatial redistribution of particles induced by the size differences of the particles, a ternary-size granular mixture in a three-dimensional rotating drum operating in the rolling flow regime is numerically simulated using the discrete element method. The results demonstrate that (i) the axial bands of the medium particles are spatially sandwiched in between those of the large and small ones; (ii) the total mass in the active and passive regions is a global parameter independent of segregation; (iii) nearly one-third of all the particles are in the active region, with the small particles having the highest mass fraction; (iv) the axial bands initially appear near the end wall, then become wider and purer in the particular species with time as more axial bands form toward the axial center; and (v) the medium particle type exhibits segregation later and has the narrowest axial bandwidth and least purity in the bands. Compared to the binary-size system, the presence of the medium particle type slightly increases the total mass in the active region, leads to larger mass fractions of the small and large particle types in the active region, and enhances the axial segregation in the system. The results obtained in the current work provide valuable insights regarding size segregation, and band structure and formation in the rotating drum with polydisperse particles.
ISSN: 1070-6631
DOI: 10.1063/1.5022861
Rights: © 2018 The Author(s). All rights reserved. This paper was published by AIP Publishing in Physics of Fluids and is made available with permission of The Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
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