@conference { ISI:000280550300020,
	title = {Shear induced diffusion in dense granular flows},
	booktitle = {IUTAM-ISIMM Symposium on Mathematical Modeling and Physical Instances of Granular Flows},
	series = {AIP Conference Proceedings},
	volume = {1227},
	year = {2010},
	note = {IUTAM-ISIMM Symposium on Mathematical Modeling and Physical Instances of Granular Flows, Reggio Calabria, ITALY, SEP 14-18, 2009},
	month = {JUN},
	pages = {221-229},
	publisher = {IUTAM; ISIMM; Italian Inst Higher Math; US Natl Sci Fdn; Reg Council Reggio Calabria; Prov Reggio Calabria; Mediterranean Univ Reggio Calabria},
	organization = {IUTAM; ISIMM; Italian Inst Higher Math; US Natl Sci Fdn; Reg Council Reggio Calabria; Prov Reggio Calabria; Mediterranean Univ Reggio Calabria},
	address = {2 Huntington Quadrangle, STE 1NO1, Melville, NY 11747-4501 USA},
	abstract = {<p>The dynamics of dense granular flows subjected to gravity induced shear are investigated experimentally using the refractive index matching technique. The system consists of grains flowing inside a bin with a rectangular cross-section and sheared by a rough boundary on one side and smooth boundaries on the remaining sides. The particles flow within a viscous interstitial liquid having the same refractive index as particles and are imaged in the bulk using laser fluorescence. The particle positions are identified very accurately and tracked over long durations to obtain the mean and fluctuating properties. The shear is observed to be non-linear and localized in a region of 3 to 4 particles near the boundary. The boundary imposes a packing order, and the grains are observed to flow in layers, parallel to the shearing boundary, which get progressively more disordered with distance from the walls. We have also carried out soft particle simulations in a equivalent system incorporating the Cundall-Strack contact model between the particles and ignoring the hydrodynamic effects of the interstitial liquid to understand the effect of particle friction coefficient, elasticity, contact model and polydispersity on the mean and fluctuating flow properties. We find the mean velocity and the number density of the particles as a function of flow cross-section and the particle fluctuation properties observed in the experiments and the simulations to in very good agreement after appropriate scaling.</p>},
	keywords = {DEM, Diffusion, granular, index matching, LAMMPS, laser fluorescence},
	isbn = {978-0-7354-0772-5},
	issn = {0094-243X},
	doi = {10.1063/1.3435393},
	author = {Orpe, Ashish V. and Rycroft, Chris H. and Kudrolli, Arshad A.},
	editor = {Goddard, J. D. and Jenkins, J. T. and Giovine, P.}
}
@article {48377,
	title = {Flow of lubricated granular material on an inclined plane},
	journal = {Powder Technology},
	volume = {409},
	year = {2022},
	month = {SEP},
	pages = {117809},
	type = {Article},
	abstract = {<p>
	We have studied the gravity driven flow of spherical shaped, millimetric sized granular material coated with aspherical, micron-sized, near frictionless lubricant particles. Experiments were performed on an inclined plane using two different sized particles for varying concentrations of the lubricant. The particle volumetric flow rate exhibits a non-monotonic behavior with increasing lubricant concentration. It shows an increase at lower lubricant concentration followed by a decrease at higher lubricant concentration. The lubricant particles adhere to the granular particle surface thereby reducing the inter-particle friction. However, presence of lubricant particles at higher concentration damps out inter-particle collision thereby reducing the inter-particle momentum transfer. Non-monotonicity in the observed behavior is then conjectured to arise due to competing effects of inter-particle friction and inter-particle collision. The present work and the overall observed behavior therein provides a simple experimental system to characterize the effects of added lubricant material in pharmaceutical and other relevant industrial applications.</p>
},
	keywords = {Friction, granular, Inclined plane, Lubrication, Powder},
	issn = {0032-5910},
	doi = {10.1016/j.powtec.2022.117809},
	author = {Ghodake, Ravindra S. and Doshi, Pankaj and Orpe, V. Ashish}
}
