Flow of magnetic repelling grains in a two-dimensional silo

  • Geoffroy Lumay GRASP, Physics Department B5, Université de Liège, B4000-Liège, Belgium.
  • J. Schockmel GRASP, Physics Department B5, Université de Liège, B4000-Liège, Belgium.
  • D. Henández-Enríquez Instituto de Física, Benemérita Universidad Autónoma de Puebla, Apartado Postal J-48, Puebla 72570, Mexico.
  • S. Dorbolo GRASP, Physics Department B5, Université de Liège, B4000-Liège, Belgium.
  • N. Vandewalle GRASP, Physics Department B5, Université de Liège, B4000-Liège, Belgium.
  • F. Pacheco-Vázquez Instituto de Física, Benemérita Universidad Autónoma de Puebla, Apartado Postal J-48, Puebla 72570, Mexico.
Keywords: Granular flow, Magnetic powder

Abstract

During a typical silo discharge, the material flow rate is determined by the contact forces between the grains. Here, we report an original study concerning the discharge of a two-dimensional silo filled with repelling magnetic grains. This non-contact interaction leads to a different dynamics from the one observed with conventional granular materials. We found that, although the flow rate dependence on the aperture size follows roughly the power-law with an exponent 3/2 found in non-repulsive systems, the density and velocity profiles during the discharge are totally different. New phenomena must be taken into account. Despite the absence of contacts, clogging and intermittence were also observed for apertures smaller than a critical size determined by the effective radius of the repulsive grains.

 

Received: 10 July 2015,  Accepted: 7 August 2015; Edited by: L. A. Pugnaloni; Reviewed by: J. R. Darias, Universidad Simón o Bolívar, Caracas, Venezuela; DOI: http://dx.doi.org/10.4279/PIP.070013

Cite as: G Lumay, J Schockmel, D Henández-Enríquez, S Dorbolo, N Vandewalle, F Pacheco-Vázquez, Papers in Physics 7, 070013 (2015)

This paper, by G Lumay, J Schockmel, D Henández-Enríquez, S Dorbolo, N Vandewalle, F Pacheco-Vázquez, is licensed under the Creative Commons Attribution License 3.0.

 

 

Open Review
Published
2015-09-16
How to Cite
Lumay, G., Schockmel, J., Henández-Enríquez, D., Dorbolo, S., Vandewalle, N., & Pacheco-Vázquez, F. (2015). Flow of magnetic repelling grains in a two-dimensional silo. Papers in Physics, 7, 070013. https://doi.org/10.4279/pip.070013
Section
Articles
Received 2015-07-10
Accepted 2015-08-07
Published 2015-09-16