Wall slip in an EHL contact lubricated with 1-dodecanol

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Title: Wall slip in an EHL contact lubricated with 1-dodecanol
Authors: Wang, P
Reddyhoff, T
Item Type: Journal Article
Abstract: A study was conducted of the factors that cause anoma lous EHD film shapes in 1 - dodecanol lubricated contacts – i.e. a thickened central plateau and an exaggerat ed outlet constriction. This has led to the hypothesis that, in the region where pressure s exceed ~0.44 GPa, dodecanol experiences slip , which reduce s the average lubricant velocity and causes an elevated film thickness in ord er to maintain flow continuity. The analysis suggests that slip must be occur r ing at, or close to, the faster moving surface, since a discontinuit y in the flow midway through the thickness of the film would not affect the average speed of the lubricant . Based on this hypothesis, an equation has been derived to predict the anomalous central film thickness as a function of applied slide - roll ratio and this has been validated by com parison with experimentally measured central film thickness values. Further support of this hypothesis is provided by traction test results showing a discontinuity occurring close to the onset of slip.
Issue Date: 29-Oct-2016
Date of Acceptance: 24-Oct-2016
URI: http://hdl.handle.net/10044/1/42351
DOI: https://dx.doi.org/10.1016/j.triboint.2016.10.034
ISSN: 1879-2464
Publisher: Elsevier
Start Page: 197
End Page: 205
Journal / Book Title: Tribology International
Volume: 113
Copyright Statement: © 2016, Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Engineering, Mechanical
Elastohydrodynamic lubrication
Wall slip
Film thickness
Dimple formation
Mechanical Engineering & Transports
0913 Mechanical Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Mechanical Engineering

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