Granular Flow, Collisional Cooling and Charged Grains
Statistical Mechanics
2009-10-31 v1 Soft Condensed Matter
Abstract
The non-Newtonian character of granular flow in a vertical pipe is analyzed. The time evolution of the flow velocity and the velocity fluctuations (or granular temperature) is derived. The steady state velocity has a power law dependence on the pipe width with an exponent between 3/4 and 3/2. The flow becomes faster the more efficient the collisional cooling is, provided the density remains low enough. The dependence of collisional cooling on the solid fraction, the restitution coefficient and a possible electric charge of all grains is discussed in detail.
Cite
@article{arxiv.cond-mat/9909205,
title = {Granular Flow, Collisional Cooling and Charged Grains},
author = {D. E. Wolf and T. Scheffler and J. Schäfer},
journal= {arXiv preprint arXiv:cond-mat/9909205},
year = {2009}
}
Comments
13 pages, 0 figures