DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hopper flows of mixtures of spherical and rod‐like particles via the multisphere method

Journal Article · · AIChE Journal
DOI: https://doi.org/10.1002/aic.16882 · OSTI ID:1579438

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.

Sponsoring Organization:
USDOE
OSTI ID:
1579438
Journal Information:
AIChE Journal, Journal Name: AIChE Journal Journal Issue: 4 Vol. 66; ISSN 0001-1541
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English

References (40)

On the Computation of Steady Hopper Flows journal January 2001
The flow of granular solids through orifices journal September 1961
Discrete element simulation of granular flow in 2D and 3D hoppers: Dependence of discharge rate and wall stress on particle interactions journal March 1995
The discharge of fine sands from conical hoppers journal October 1995
Prediction of hopper discharge rates of binary granular mixtures journal February 1998
DEM modelling of industrial granular flows: 3D case studies and the effect of particle shape on hopper discharge journal February 2002
Distinct element modelling of non-spherical frictionless particle flow journal January 2004
Predicting discharge dynamics from a rectangular hopper using the discrete element method (DEM) journal December 2008
Force model considerations for glued-sphere discrete element method simulations journal August 2009
DEM investigation of shear flows of binary mixtures of non-spherical particles journal July 2019
Industrial scale simulations of tablet coating using GPU based DEM: A validation study journal July 2019
On the computation of steady Hopper flows journal November 2004
On the computation of steady hopper flows III: Model comparisons journal November 2006
A new collision model for ellipsoidal particles in shear flow journal January 2019
Modeling granular segregation in flow from quasi-three-dimensional, wedge-shaped hoppers journal January 2008
A study on the validity of the multi-sphere Discrete Element Method journal December 2008
Predicting the flow mode from hoppers using the discrete element method journal October 2009
Experimental validation of polyhedral discrete element model journal December 2011
Open-source MFIX-DEM software for gas–solids flows: Part I—Verification studies journal April 2012
Experimental and numerical investigation on the influence of particle shape and shape approximation on hopper discharge using the discrete element method journal February 2013
Flow characteristics and discharge rate of ellipsoidal particles in a flat bottom hopper journal February 2014
A study on the influence of particle shape on the mechanical interactions of granular media in a hopper using the Discrete Element Method journal July 2015
Packing of cylindrical particles: DEM simulations and experimental measurements journal July 2017
Turbulent Flows book July 2012
The stress tensor in a two-dimensional granular shear flow journal March 1986
The stress tensor for simple shear flows of a granular material journal June 1989
A constitutive model with microstructure evolution for flow of rate-independent granular materials journal July 2011
A numerical study of granular shear flows of rod-like particles using the discrete element method journal October 2012
Outflow and clogging of shape-anisotropic grains in hoppers with small apertures journal January 2017
Signatures of incipient jamming in collisional hopper flows journal January 2013
Force Schemes in Simulations of Granular Materials journal January 1996
Elastic Flows Of Ellipsoidal Particles
  • Campbell, Charles S.; Nakagawa, Masami; Luding, Stefan
  • POWDERS AND GRAINS 2009: PROCEEDINGS OF THE 6TH INTERNATIONAL CONFERENCE ON MICROMECHANICS OF GRANULAR MEDIA, AIP Conference Proceedings https://doi.org/10.1063/1.3179996
conference January 2009
Computer simulation of hopper flow journal November 1996
Simulation of Filling and Emptying in a Hexagonal-Shape Solar Grain silo journal October 2000
A DEM Analysis of Flow Characteristics of Noncohesive Particles in Hopper journal January 2008
Geometry of frictionless and frictional sphere packings journal February 2002
Objective decomposition of the stress tensor in granular flows journal February 2005
Shear-induced alignment and dynamics of elongated granular particles journal November 2012
Orientational Order and Alignment of Elongated Particles Induced by Shear journal May 2012
Discrete Element Method Simulations for Complex Granular Flows journal January 2015

Similar Records

Related Subjects