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TECHNICAL PAPERS

Particle Entrainment in Elastohydrodynamic Point Contacts and Related Risks of Oil Starvation and Surface Indentation

[+] Author and Article Information
George K. Nikas

Tribology section, Mechanical Engineering Department, Imperial College of Science, Technology and Medicine, Exhibition Road, London SW7 2BX, England

J. Tribol 124(3), 461-467 (May 31, 2002) (7 pages) doi:10.1115/1.1467083 History: Received January 09, 2001; Revised September 27, 2001; Online May 31, 2002
Copyright © 2002 by ASME
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References

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Jeffery,  G. B., 1922, “The Motion of Ellipsoidal Particles Immersed in a Viscous Fluid,” Proc. R. Soc. London, Ser. A, 102, pp. 161–179.
Rubinow,  S. I., and Keller,  J. B., 1961, “The Transverse Force on a Spinning Sphere Moving in a Viscous Fluid,” J. Fluid Mech., 11, pp. 447–459.
Bretherton,  F. P., 1962, “The Motion of Rigid Particles in a Shear Flow at Low Reynolds Number,” J. Fluid Mech., 14, pp. 284–304.
Saffman,  P. G., 1965, “The Lift on a Small Sphere in a Slow Shear Flow,” J. Fluid Mech., 22, pp. 385–400.
Leal,  L. G., 1979, “The Motion of Small Particles in Non-Newtonian Fluids,” J. Non-Newtonian Fluid Mech., 5, pp. 33–78.
Leal,  L. G., 1980, “Particle Motions in a Viscous Fluid,” Annu. Rev. Fluid Mech., 12, pp. 435–476.
Brunn,  P., 1976, “The Slow Motion of a Sphere in a Second-Order Fluid,” Rheol. Acta, 15(3/4), pp. 163–171.
Brunn,  P., 1976, “The Behavior of a Sphere in Non-Homogeneous Flows of a Viscoelastic Fluid,” Rheol. Acta, 15(11/12), pp. 589–611.
Brunn,  P., 1977, “Interaction of Spheres in a Viscoelastic Fluid,” Rheol. Acta, 16(5), pp. 461–475.
Drew,  D. A., 1978, “The Force on a Small Sphere in Slow Viscous Flow,” J. Fluid Mech., 88, pp. 393–400.
Sugihara-Seki,  M., 1993, “The Motion of an Elliptical Cylinder in Channel Flow at Low Reynolds Numbers,” J. Fluid Mech., 257, pp. 575–596.
Saville,  D. A., 1977, “Electrokinetic Effects With Small Particles,” Annu. Rev. Fluid Mech., 9, pp. 321–337.
Sayles,  R. S., and Ioannides,  E., 1988, “Debris Damage in Rolling Bearings and Its Effects on Fatigue Life,” ASME J. Tribol., 110, pp. 26–31.
Nikas,  G. K., 2001, “Mathematical Analysis of the Entrapment of Solid Spherical Particles in Non-Conformal Contacts,” ASME J. Tribol., 123(1), pp. 83–93.
Dai,  F., and Khonsari,  M. M., 1993, “A Continuum Theory of a Lubrication Problem With Solid Particles,” ASME J. Appl. Mech., 60, pp. 48–58.
Dwyer-Joyce, R. S., and Heymer, J., 1996, “The Entrainment of Solid Particles into Rolling Elastohydrodynamic Contacts,” Proc. of the 22nd Leeds-Lyon Symposium on Tribology, Tribology Series, 31 , Elsevier, pp. 135–140.
Kumar,  A., Schmid,  S. R., and Wilson,  W. R. D., 1997, “Particle Behavior in Two-Phased Lubrication,” Wear, 206, pp. 130–135.
Nikas, G. K., Sayles, R. S., and Ioannides, E., 1998, “Effects of Debris Particles in Sliding/Rolling Elastohydrodynamic Contacts,” Proc. IMechE, Part J: J. Engineering Tribology, (ISSN 1350–6501), 212 , No. J5, pp. 333–343.
Nikas, G. K., 1999, “Theoretical Modelling of the Entrainment and Thermomechanical Effects of Contamination Particles in Elastohydrodynamic Contacts,” Ph.D. thesis, Imperial College, Mech. Eng. Dept., Tribology Section, London, England.
Wan,  G. T. Y., and Spikes,  H. A., 1988, “The Behavior of Suspended Solid Particles in Rolling and Sliding Elastohydrodynamic Contacts,” STLE Tribol. Trans., 31(1), pp. 12–21.
Cusano,  C., and Sliney,  H. E., 1982, “Dynamics of Solid Dispersions in Oil During the Lubrication of Point Contacts, Part I—Graphite” ASLE Trans., 25(2), pp. 183–189.
Nikas,  G. K., Ioannides,  E., and Sayles,  R. S., 1999, “Thermal Modeling and Effects From Debris Particles in Sliding/Rolling EHD Line Contacts—A Possible Local Scuffing Mode,” ASME J. Tribol., 121(2), pp. 272–281.
Nikas,  G. K., 2001, “An Advanced Model to Study the Possible Thermomechanical Damage of Lubricated Sliding-Rolling Line Contacts From Soft Particles,” ASME J. Tribol., 123(4), pp. 828–841.

Figures

Grahic Jump Location
Configuration of the model: ball, flat, and oil bath
Grahic Jump Location
Flow chart of the model
Grahic Jump Location
30 possible trajectories of a 20 μm particle put in the upper half area of the plot
Grahic Jump Location
Bar chart showing an example of areas where a single particle will collide on the ball (depends on the particle initial position)
Grahic Jump Location
Bar chart showing an example of the likelihood of particle rejection for those particles which collide on the ball

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