# Comparing and contrasting size-based particle segregation models

@article{Tunuguntla2017ComparingAC,
title={Comparing and contrasting size-based particle segregation models},
author={Deepak R. Tunuguntla and Thomas Weinhart and Anthony R. Thornton},
journal={Computational Particle Mechanics},
year={2017},
volume={4},
pages={387-405}
}
• Published 1 October 2017
• Engineering
• Computational Particle Mechanics
Over the last 12 years, numerous new theoretical continuum models have been formulated to predict particle segregation in the size-based bidisperse granular flows over inclined channels. Despite their presence, to our knowledge, no attempts have been made to compare and contrast the fundamental basis upon which these continuum models have been formulated. In this paper, firstly, we aim to illustrate the difference in these models including the incompatible nomenclature which impedes direct…
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## References

SHOWING 1-10 OF 49 REFERENCES
MODELING OF PARTICLE SIZE SEGREGATION: CALIBRATION USING THE DISCRETE PARTICLE METHOD
• Materials Science
• 2011
Over the last 25 years a lot of work has been undertaken on constructing continuum models for segregation of particles of different sizes. We focus on one model that is designed to predict
A mixture theory for size and density segregation in shallow granular free-surface flows
• Engineering
Journal of Fluid Mechanics
• 2014
Abstract In the past ten years much work has been undertaken on developing mixture theory continuum models to describe kinetic sieving-driven size segregation. We propose an extension to these models
Modeling segregation of bidisperse granular materials using physical control parameters in the quasi-2D bounded heap
• Materials Science
• 2015
Quantitatively predicting segregation of size-disperse granular materials is of potential value in many industrial applications. We consider granular segregation of size-bidisperse particles in
Modelling density segregation in flowing bidisperse granular materials
• Geology
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
• 2016
Preventing segregation in flowing granular mixtures is an ongoing challenge for industrial processes that involve the handling of bulk solids. A recent continuum-based modelling approach accurately
Modelling size segregation of granular materials: the roles of segregation, advection and diffusion
• Materials Science
Journal of Fluid Mechanics
• 2014
Abstract Predicting segregation of granular materials composed of different-sized particles is a challenging problem. In this paper, we develop and implement a theoretical model that captures the
Stress partition and microstructure in size-segregating granular flows.
• Geology
Physical review. E, Statistical, nonlinear, and soft matter physics
• 2015
This study explores the size segregation mechanism in granular chute flows in terms of the pressure distribution and granular microstructure and investigates how the contact stress partition relates to the flow microst structure and suggests that the latter may provide an interesting proxy for studying gravity-induced segregation.
A continuum approach for predicting segregation in flowing polydisperse granular materials
• Geology
Journal of Fluid Mechanics
• 2016
Segregation of polydisperse granular materials occurs in many natural and industrial settings, but general theoretical modelling approaches with predictive power have been lacking. Here we describe a
Asymmetric flux models for particle-size segregation in granular avalanches
• Physics
Journal of Fluid Mechanics
• 2014
Abstract Particle-size segregation commonly occurs in both wet and dry granular free-surface flows through the combined processes of kinetic sieving and squeeze expulsion. As the granular material is
A theory for particle size segregation in shallow granular free-surface flows
• Engineering
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
• 2005
Abstract Granular materials composed of a mixture of grain sizes are notoriously prone to segregation during shaking or transport. In this paper, a binary mixture theory is used to formulate a model
Experimental investigation into segregating granular flows down chutes
• Materials Science
• 2011
We experimentally investigated how a binary granular mixture made up of spherical glass beads (size ratio of 2) behaved when flowing down a chute. Initially, the mixture was normally graded, with all