Flow of lubricated granular material on an inclined plane
Abstract
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 interparticle 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.
Keywords
Cite
@article{arxiv.2210.11758,
title = {Flow of lubricated granular material on an inclined plane},
author = {Ravindra S. Ghodake and Pankaj Doshi and Ashish V. Orpe},
journal= {arXiv preprint arXiv:2210.11758},
year = {2022}
}
Comments
20 pages, 7 figures, supplementary material (movie files and their information) provided along with