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TECHNICAL PAPERS

Flow Characterization and Performance of a Powder Lubricated Slider Bearing

[+] Author and Article Information
Manjunath Pappur, M. M. Khonsari

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70808

J. Tribol 125(1), 135-144 (Dec 31, 2002) (10 pages) doi:10.1115/1.1467634 History: Received September 10, 2001; Revised December 27, 2001; Online December 31, 2002
Copyright © 2003 by ASME
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References

Heshmat,  H., 1992, “The Quasi-Hydrodynamic Mechanism of Powder Lubrication: Part II—Lubricant Film Pressure Profile,” Lubr. Eng., 48, pp. 373–383.
Heshmat,  H., 1993, “Wear Reduction Systems for Coal-Fueled Diesel Engines. I. The Basics of Powder Lubrication,” Wear, 162-164, pp. 508–517.
Kaur,  R., 2001, “The Power of Powder,” Lubs-n-Greases, 7 , pp. 50–54.
Zhou,  L., and Khonsari,  M. M., 2000, “Flow Characteristics of a Powder Lubricant Sheared Between Parallel Plates,” ASME J. Tribol., 122, p. 147.
Johnson,  P. C., and Jackson,  R., 1987, “Frictional-Collisional Constitutive Relations for Granular Materials, With Application to Plane Shearing,” J. Fluid Mech., 176, p. 67.
Jenkins,  J. T., and Richman,  M. W., 1986, “Boundary Conditions for Plane Flows of Smooth, Nearly Elastic, Circular Disks,” J. Fluid Mech., 171, pp. 53–69.
Lun,  C. K. K., Savage,  S. B., Jeffrey,  D. J., and Chepurniy,  N., 1984, “Kinetic Theories for Granular Flow: Inelastic Particles in Couette Flow and Slightly Inelastic Particles in a General Flowfield,” J. Fluid Mech., 140, p. 223.
Hui,  K., Haff,  P. K., Ungar,  J. E., and Jackson,  R., 1984, “Boundary Conditions for High-Shear Grain Flows,” J. Fluid Mech., 145, p. 223.
Yu,  C. M., Craig,  K., and Tichy,  J., 1994, “Granular Collision Lubrication,” J. Rheol., 38pp. 921–936.
McKeague,  K. T., and Khonsari,  M. M., 1996, “An Analysis of Powder Lubricated Slider Bearings,” ASME J. Tribol., 118, p. 206.
Haff,  P. K., 1983, “Grain Flow as a Fluid-Mechanical Phenomenon,” J. Fluid Mech., 134, p. 401.
Elrod, H. G., 1988, “Granular Flow as a Tribological Mechanism—A First Look,” Interface Dynamics, Leeds-Lyon Symposium, BHRA, pp. 75–102.
Jenkins,  J. T., and Savage,  S. B., 1983, “A Theory for the Rapid Flow of Identical, Smooth, Nearly Elastic, Spherical Particles,” J. Fluid Mech., 130, p. 187.
Savage,  S. B., and Jeffrey,  D. J., 1981, “The Stress Tensor in a Granular Flow at High Shear Rates,” J. Fluid Mech., 110, pp. 255–272.
Carnahan,  N. F., and Starling,  K. E., 1969, “Equation of State for Nonattracting Rigid Spheres,” J. Chem. Phys., 51, pp. 635–636.
Heshmat,  H., 2000, “The Effect of Slider Geometry on the Performance of a Powder Lubricated Bearing—Theoretical Considerations,” STLE Tribol. Trans., 43, pp. 213–220.

Figures

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Effect of coefficient of restitution of granule on pressure profile
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(a) Variation of slip velocity at the top plate along the slider’s length; and (b) variation of slip velocity at the bottom plate along the slider’s length    
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(a) Variation of pseudo-temperature at the top plate along the slider’s length; and (b) variation of pseudo-temperature at the bottom plate along the slider’s length
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(a) Variation of solid volume fraction at the top plate along the slider’s length; and (b) variation of solid volume fraction at the bottom plate along the slider’s length
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Effect of bottom plate velocity on friction coefficient
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Effect of granule diameter on friction coefficient
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Two-dimensional powder flow in a slider bearing
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(a) Velocity distribution of the granules along the slider’s length; (b) temperature distribution of the granules along the slider’s length; and (c) solid volume fraction distribution of the granules along the slider’s length.
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Benchmark pressure profile in comparison with experimental curve
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Pressure profiles for starvation simulated slider bearing
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Variation of friction coefficient with loads
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Effect of speed and load on volumetric flow rate

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