Empirical Prediction of the Shear Layer Thickness in Lubricating Films

[+] Author and Article Information
N. Z. Wang

Chang Gung College of Medicine and Technology, Taiwan

A. Seireg

University of Wisconsin-Madison, 1513 University Ave., Madison, WI 53706; University of Florida-Gainesville, Gainesville, FL

J. Tribol 117(3), 444-449 (Jul 01, 1995) (6 pages) doi:10.1115/1.2831273 History: Received February 01, 1994; Revised July 28, 1994; Online January 24, 2008


A computational procedure has been presented by Wang and Seireg (1993) for the thermohydrodynamic analysis of fluid film bearings with the assumption of a central heat generation (shear) zone and the consideration of the thermal expansion across the film. This paper presents a dimensionless relationship for predicting the thickness of the shear layer in lubricating films, which is developed based on the extensive experimental data for the journal bearing reported by Ezzat (1971) and Seireg and Ezzat (1973). The relationship which was found to be a function of Sommerfeld and Peclet numbers is then applied to evaluate the pressure distribution for other cases of journal and slider bearings. The results show excellent correlation with the experimental results in all the investigated conditions.

Copyright © 1995 by The American Society of Mechanical Engineers
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