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TECHNICAL BRIEFS

Some Discussions on the Flow Factor Tensor—Considerations of Roughness Orientation and Flow Rheology

[+] Author and Article Information
Wang-Long Li

Department of Mechanical Engineering, National Kaohsiung Institute of Technology,* 415, Chien Kung Road, Kaohsiung, Taiwan 80782

J. Tribol 122(4), 869-872 (Apr 17, 2000) (4 pages) doi:10.1115/1.1310368 History: Received August 12, 1999; Revised April 17, 2000
Copyright © 2000 by ASME
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References

Hughes,  G. D., and Bush,  A. W., 1993, “An Average Reynolds Equation for non-Newtonian Fluids in EHL Line Contacts,” ASME J. Tribol., 115, pp. 666–669.
Chang,  L., 1992, “Traction in Thermal Elastohydrodynamic Lubrication of Rough Surfaces,” ASME J. Tribol., 114, pp. 186–191.
Li,  W. L., Weng,  C. I., and Hwang,  C. C., 1995, “Effects of Roughness Orientation on Thin Film Lubrication of a Magnetic Recording System,” J. Phys. D: Applied Physics, 28, pp. 1011–1021.
Li,  W. L., and Weng,  C. I., and Hwang,  C. C., 1997, “An Average Reynolds Equation for non-Newtonian Fluid, With Application to the Lubrication of the Magnetic Head-Disk Interface,” STLE Tribol. Trans., 40, pp. 111–119.
Li,  W. L., Weng,  C. I., and Lue,  J. I., 1996, “Surface Roughness Effects in Journal Bearing With non-Newtonian Lubricants,” STLE Tribol. Trans., 39, pp. 819–826.
Li,  W. L., 1998, “Surface Roughness Effects in Hydrodynamic Lubrication Involving the Mixture of Two Fluids,” ASME J. Tribol., 120, pp. 772–780.
Elrod,  H. G., 1973, “Thin-Film Lubrication Theory for Newtonian Fluids With Surface Processing Striated Roughness or Grooving,” ASME J. Lubr. Technol., 95, pp. 484–489.
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Tonder,  K., 1977, “Mathematical Verification of the Applicability of Modified Reynolds Equation to Striated Rough Surfaces,” Wear, 44 No. 2, pp. 329–343.
Tonder,  K., 1986, “The Lubrication of Unidirectional Striated Roughness: Consequences for Some General Roughness Theories,” ASME J. Tribol., 108, pp. 167–170.
Lo,  S. W., 1992, “On the Effects of Roughness Orientation—A Mapping and Double Scale Analysis of Flow Factors,” ASME J. Tribol., 114, pp. 747–754.
Patir,  N., and Cheng,  H. S., 1978, “An Average Flow Model for Determining Effects of Three-Dimensional Roughness on Partial Hydrodynamic Lubrication,” ASME J. Lubr. Technol., 100, pp. 12–17.
Tripp,  J. H., 1983, “Surface Roughness Effects in Hydrodynamic Lubrication: The Flow Factor Method,” ASME J. Lubr. Technol., 105, pp. 458–465.
Peklenik,  J., 1967–68, “New Developments in Surface Characterization and Measurements by Means of Random Process Analysis,” Proc. ImechE, 182, Part 3K, pp. 108–126.

Figures

Grahic Jump Location
Representative asperity and coordinates
Grahic Jump Location
Mohr’s circle representation of flow factors
Grahic Jump Location
θ1 versus θ2 for n=1.2 (Eq. (16))
Grahic Jump Location
γ versus θ for Eq. (17)

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