Granular Lubrication: Toward an Understanding of the Transition Between Kinetic and Quasi-Fluid Regime

[+] Author and Article Information
I. Iordanoff

Laboratoire de Mécanique des Contacts UMR INSA-CNRS 5514, 20 Avenue Albert Einstein, 69621 Villeurbanne Cedex

M. M. Khonsari

Dow Chemical Endowed Chair in Rotating Machinery and Professor, Department of Mechanical Engineering, 2508 CEBA, Louisiana State University, Baton Rouge, LA 70803

J. Tribol 126(1), 137-145 (Jan 13, 2004) (9 pages) doi:10.1115/1.1633575 History: Received October 08, 2002; Revised April 24, 2003; Online January 13, 2004
Copyright © 2004 by ASME
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Simulated domain for the particle dynamic model
Grahic Jump Location
Definition of velocities and contact duration Tc for a binary impact
Grahic Jump Location
Evolution of solid fraction, velocity and granular temperature through the thickness of the contact for two values of stiffness, with e=0.8,Ep=28,fg=0.7123,ΔRg=10 percent. The calculated pressure on the upper wall is 0.0202 for K=40,000 and 0.0205 for K=40,000,000.
Grahic Jump Location
Velocity accommodation for two types of granular material: (a) same size, ΔRg=0 percent, and (b) poly-disperse size, ΔRg=25 percent. At time 0 of the simulation, two columns of different colors are marked in order to visualize the way the particles accommodate the movement.
Grahic Jump Location
Test for the kinetic regime
Grahic Jump Location
Evolution of dimensionless pressure versus global solid fraction with e=0.8
Grahic Jump Location
Local data for different global solid fraction and for e=0.8
Grahic Jump Location
Normalized pressure versus coefficient of restitution
Grahic Jump Location
Comparison between PDM model and kinetic model: velocity distribution (mass flow rate, Ms=0.174)
Grahic Jump Location
Comparison between PDM model and kinetic model: Granular temperature distribution
Grahic Jump Location
Comparison between PDM model and kinetic model: Area/Solid fraction distribution
Grahic Jump Location
Velocity profile when global solid fraction increases
Grahic Jump Location
Δfc versus dimensionless pressure
Grahic Jump Location
Δfc versus global solid fraction
Grahic Jump Location
Local solid fraction through the gap at transition
Grahic Jump Location
Δfc versus maximum local area fraction through the gap.




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In