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RESEARCH PAPERS

The Lubrication of Unidirectional Striated Roughness: Consequences for Some General Roughness Theories

[+] Author and Article Information
Kristian To̸nder

Division of Machine Design, University of Trondheim, N-7034 Trondheim, Norway

J. Tribol 108(2), 167-170 (Apr 01, 1986) (4 pages) doi:10.1115/1.3261155 History: Received March 05, 1985; Online October 29, 2009

Abstract

Relations expressing the effects of unidirectional striated roughness on hydrodynamic quantities, relative to the normal x–y coordinate system are derived. It is shown that the angle between the direction of the grooves and that of motion may be expressed by the Kubo-Peklenik number, γ, for random striations. A comparison between the ensuing results and those claimed by other authors to be valid for area-distributed random roughness, is made. The two sets are identical for γ equal to unity, regardless of autocorrelation functions, but strong arguments indicating this correspondence to hold for all γ’s are presented. It is concluded that the results are, in general, valid for unidirectional striations only.

Copyright © 1986 by ASME
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