Hopper Flows of Mixtures of Spherical and Rod-Like Particles via the Multisphere Method
Abstract
The discharge of granular media from hoppers plays a vital role in many solids handling operations. The dynamic flow of poly-disperse nonspherical particles differs markedly from mono-disperse spheres and highlights the need to rigorously account for particle shape effects. The multisphere discrete element method (MS-DEM) was utilized here to examine the bulk packing fraction, discharge rate, collisional stress tensor, and order parameter of a bi-disperse sphere-rod mixture evacuating a hopper. A modified form of the Myers and Sellers correlation with variable shape factor is capable of replicating the MS-DEM discharge data. The collisional stress tensor is observed to be highly symmetric for mono-disperse spheres but becomes asymmetric when rod-like particles are introduced. The order parameter within the hopper increases significantly during discharge and the rod-like particles undergo shear induced alignment with their long dimensions orthogonal to the outflow plane.
- Authors:
-
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B)
- OSTI Identifier:
- 1593079
- Report Number(s):
- NREL/JA-2700-74572
- DOE Contract Number:
- AC36-08GO28308
- Resource Type:
- Journal Article
- Journal Name:
- AIChE Journal
- Additional Journal Information:
- Journal Volume: 66; Journal Issue: 4
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; discrete element method; hopper flow; multisphere
Citation Formats
Lattanzi, Aaron, and Stickel, Jonathan J. Hopper Flows of Mixtures of Spherical and Rod-Like Particles via the Multisphere Method. United States: N. p., 2019.
Web. doi:10.1002/aic.16882.
Lattanzi, Aaron, & Stickel, Jonathan J. Hopper Flows of Mixtures of Spherical and Rod-Like Particles via the Multisphere Method. United States. https://doi.org/10.1002/aic.16882
Lattanzi, Aaron, and Stickel, Jonathan J. Mon .
"Hopper Flows of Mixtures of Spherical and Rod-Like Particles via the Multisphere Method". United States. https://doi.org/10.1002/aic.16882.
@article{osti_1593079,
title = {Hopper Flows of Mixtures of Spherical and Rod-Like Particles via the Multisphere Method},
author = {Lattanzi, Aaron and Stickel, Jonathan J},
abstractNote = {The discharge of granular media from hoppers plays a vital role in many solids handling operations. The dynamic flow of poly-disperse nonspherical particles differs markedly from mono-disperse spheres and highlights the need to rigorously account for particle shape effects. The multisphere discrete element method (MS-DEM) was utilized here to examine the bulk packing fraction, discharge rate, collisional stress tensor, and order parameter of a bi-disperse sphere-rod mixture evacuating a hopper. A modified form of the Myers and Sellers correlation with variable shape factor is capable of replicating the MS-DEM discharge data. The collisional stress tensor is observed to be highly symmetric for mono-disperse spheres but becomes asymmetric when rod-like particles are introduced. The order parameter within the hopper increases significantly during discharge and the rod-like particles undergo shear induced alignment with their long dimensions orthogonal to the outflow plane.},
doi = {10.1002/aic.16882},
url = {https://www.osti.gov/biblio/1593079},
journal = {AIChE Journal},
number = 4,
volume = 66,
place = {United States},
year = {2019},
month = {12}
}
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