Lubrication With Granular Flow: Continuum Theory, Particle Simulations, Comparison With Experiment

[+] Author and Article Information
W. Gregory Sawyer

Department of Mechanical Engineering, University of Florida, Gainesville, FL 32611

John A. Tichy

Department of Mechanical Engineering, Aeronautical Engineering, and Mechanics, Rensselaer Polytechnic Institute, Troy, NY 12180

J. Tribol 123(4), 777-784 (Dec 08, 2000) (8 pages) doi:10.1115/1.1353178 History: Received October 21, 2000; Revised December 08, 2000
Copyright © 2001 by ASME
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Schematic of the shear cell apparatus
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Diagram of the simulation shear cell and the experimental shear cell configuration
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Diagram of a representative collision between a particle and wall surface
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Diagrams of a representative binary particle—particle collision. Inertial and body0-attached (primed) coordinate systems.
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Continuum model result. Variation of solid volume fraction across gap.
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Continuum model result. Variation of mixture velocity across gap.
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A particle dynamics simulation. Contour plots of the same configuration at specific instants in time: (a) the particle’s translational kinetic energy; (b) the particle’s flow direction velocity.
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Density contour plot of the simulation volume; flow direction is out of the page.
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Normal load behavior: comparison of continuum and particle dynamics analysis to experiment.
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Shear force behavior: comparison of continuum and particle dynamics analysis to experiment.



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