The flow rate of granular materials through an orifice
Soft Condensed Matter
2007-08-01 v1 Statistical Mechanics
Abstract
The flow rate of grains through large orifices is known to be dependent on its diameter to a 5/2 power law. This relationship has been checked for big outlet sizes, whereas an empirical fitting parameter is needed to reproduce the behavior for small openings. In this work, we provide experimental data and numerical simulations covering a wide span of outlet sizes, both in three and two dimensions. This allows us to show that the laws that are usually employed are satisfactory only if a small range of openings is considered. We propose a new law for the mass flow rate of grains that correctly reproduces the data for all the orifice sizes, including the behaviors for very large and very small outlet sizes.
Keywords
Cite
@article{arxiv.0707.4550,
title = {The flow rate of granular materials through an orifice},
author = {C. Mankoc and A. Janda and R. Arévalo and J. M. Pastor and I. Zuriguel and A. Garcimartín and D. Maza},
journal= {arXiv preprint arXiv:0707.4550},
year = {2007}
}
Comments
submitted to Granular Matter