A Transition-Turbulent Lubrication Theory Using Mixing Length Concept

[+] Author and Article Information
P. B. Kosasih, A. K. Tieu

Department of Mechanical Engineering, The University of Wollongong, Wollongong NSW 2500, Australia

J. Tribol 115(4), 591-596 (Oct 01, 1993) (6 pages) doi:10.1115/1.2921680 History: Received February 26, 1992; Revised June 25, 1993; Online June 05, 2008


This paper applies the recently introduced Reynolds stress expression (Tieu and Kosasih, 1992) in the transition-turbulent lubrication analysis. The Reynolds stress is modeled using the mixing length expression which is able to account for the effect of local shear stress gradient, and it can be extended to apply in the transition regime. This theory is then used to determine three-dimensional velocity distributions between parallel plates. From the results, a set of coefficients covering transition-turbulent regime used in conjunction with the modified Reynolds equation is presented. It is shown that the resulting coefficients agree well with results of Elrod and Ng (1967) in the fully turbulent regime while differences are shown in the transition regime. Pressure distributions and load carrying capacity of superlaminar journal bearing are compared with available experimental data.

Copyright © 1993 by The American Society of Mechanical Engineers
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