Modeling segregation in granular flows

PB Umbanhowar, RM Lueptow… - Annual review of …, 2019‏ - annualreviews.org
Accurate continuum models of flow and segregation of dense granular flows are now
possible. This is the result of extensive comparisons, over the last several years, of computer …

Segregation of granular materials in bounded heap flow: A review

Y Fan, KV Jacob, B Freireich, RM Lueptow - Powder technology, 2017‏ - Elsevier
Heap formation occurs widely in industry when particulate materials are filled into vessels
such as hoppers, silos, bulk bags and bins. If the bulk materials are composed of particles …

Modelling size segregation of granular materials: the roles of segregation, advection and diffusion

Y Fan, CP Schlick, PB Umbanhowar… - Journal of fluid …, 2014‏ - cambridge.org
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 …

Theory for shear-induced segregation of dense granular mixtures

Y Fan, KM Hill - New journal of physics, 2011‏ - iopscience.iop.org
It is well known that a mixture of different sized particles will segregate in a gravitational field.
However, it has only recently been shown that a gradient of shear rate alone can drive …

Phase transitions in shear-induced segregation of granular materials

Y Fan, KM Hill - Physical review letters, 2011‏ - APS
We computationally study shear-induced segregation of different-sized particles in vertical
chute flow. We find that, for low solid fractions, large particles segregate toward regions of …

Granular convection in microgravity

N Murdoch, B Rozitis, K Nordstrom, SF Green… - Physical review …, 2013‏ - APS
We investigate the role of gravity on convection in a dense granular shear flow. Using a
microgravity-modified Taylor-Couette shear cell under the conditions of parabolic flight …

Shear-driven segregation of dry granular materials with different friction coefficients

KA Gillemot, E Somfai, T Börzsönyi - Soft Matter, 2017‏ - pubs.rsc.org
We report the first experimental demonstration of bulk segregation in a shear-driven dry
granular mixture, where the particles only differ in their surface friction coefficients. We found …

Understanding and exploiting competing segregation mechanisms in horizontally rotated granular media

CRK Windows-Yule, BJ Scheper… - New journal of …, 2016‏ - iopscience.iop.org
The axial segregation of granular and particulate media is a well-known but little-understood
phenomenon with direct relevance to various natural and industrial processes. Over the past …

Segregation of large particles in dense granular flows suggests a granular Saffman effect

K van der Vaart, MP van Schrojenstein Lantman… - Physical review fluids, 2018‏ - APS
We report on the scaling between the lift force and the velocity lag experienced by a single
particle of different size in a monodisperse dense granular chute flow. The similarity of this …

Shear-induced segregation of particles by material density

Y Fan, KM Hill - Physical Review E, 2015‏ - APS
Recently, shear rate gradients and associated gradients in velocity fluctuations (eg, granular
temperatures or kinetic stresses) have been shown to drive segregation of different-sized …