Thermal Elastohydrodynamic Lubrication of Rough Surfaces

[+] Author and Article Information
F. Sadeghi, Ping C. Sui

School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907

J. Tribol 112(2), 341-346 (Apr 01, 1990) (6 pages) doi:10.1115/1.2920262 History: Received April 10, 1989; Revised November 21, 1989; Online June 05, 2008


A numerical solution to the problem of thermal and compressible elastohydrodynamic (EHD) lubrication of rolling/sliding rough surfaces was obtained by neglecting the transient effects. The technique involves the simultaneous solution of thermal Reynolds and modified elasticity equations using the Newton-Raphson technique, and the energy equation using the control volume finite element method. The effects of various loads, amplitude of asperity, and radius of curvature of asperity have been investigated. Results have been presented for moderate dimensionless load of W = 9.03 × 10−5 to heavy load of W = 2.3 × 10−4 at the speed of U* = 9.2 × 10−11 . The results indicate that surface roughness significantly affect the pressure, temperature, and traction in EHD lubrication.

Copyright © 1990 by The American Society of Mechanical Engineers
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