Granular Matter

, Volume 7, Issue 4, pp 199–202

Effects of end wall friction in rotating cylinder granular flow experiments

  • J. E. Maneval
  • K. M. Hill
  • B. E. Smith
  • A. Caprihan
  • E. Fukushima
Article

DOI: 10.1007/s10035-005-0211-4

Cite this article as:
Maneval, J., Hill, K., Smith, B. et al. Granular Matter (2005) 7: 199. doi:10.1007/s10035-005-0211-4

Abstract

Dry granular flows in half-filled horizontal rotating cylinders were studied by NMR to ascertain end wall effects. We measured the velocity and density profiles in planes perpendicular to the axis of the drums for three cases: (1) Near the end wall of a long ``3D'' cylinder, (2) Near the middle of the long cylinder and, (3) For the whole of a short ``2D'' cylinder. The velocity near the free surface is fastest for the short cylinder and slowest near the end wall of the long cylinder. We believe that these differences are due to friction between the beads and the end walls, speeding up the flow for the 2D drum and reducing the near-wall speed for the 3D drum.

Keywords

Dry Granular Rotating drum End wall Velocity profile NMR 

Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • J. E. Maneval
    • 1
  • K. M. Hill
    • 2
  • B. E. Smith
    • 3
  • A. Caprihan
    • 4
  • E. Fukushima
    • 4
  1. 1.Department of Chemical EngineeringBucknell UniversityLewisburg
  2. 2.Department of Theoretical and Applied MechanicsUniversity of Illinois at Urbana-Champaign 124 Talbot LaboratoryUrbana
  3. 3.Department of PhysicsClark UniversityWorcester
  4. 4.New Mexico ResonanceSE; Suite C1 Albuquerque

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