Numerical Simulation of Elastohydrodynamically Lubricated Contacts With Rough Surfaces

[+] Author and Article Information
Alan Xiaolan Ai, Herbert S. Cheng

Center for Engineering Tribology, Northwestern University, Evanston IL 60208

Appl. Mech. Rev 47(6S), S221-S227 (Jun 01, 1994) doi:10.1115/1.3124411 History:


Transient numerical analysis to elastohydrodynamically lubricated point contacts with rough surfaces is described. The numerical simulation is based on the multigrid method. Three types of surface roughness: single dent or bump, oblique waviness and random roughness are reviewed. Under heavily loaded conditions, results reveal a strong domination of Couette flow (convective flow). The presence of sliding greatly increases pressure fluctuation and as a consequence may lead to surface-initiated spallings. For obliquely orientated roughness, lubricant flow intends to deform the ridges and create primarily longitudinal passages.

Copyright © 1994 by American Society of Mechanical Engineers
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