Identifying the optimal interfacial parameter correlated with hydrodynamic lubrication

Liang GUO; Patrick WONG; Feng GUO

doi:10.1007/s40544-016-0131-9

Friction 2016, 4(4): 347-358 https://doi.org/10.1007/s40544-016-0131-9

Research Article |

Open Access | Issue | Published: 23 December 2016

Identifying the optimal interfacial parameter correlated with hydrodynamic lubrication

Show Author's Information Hide Author's Information Liang GUO^¹(

), Patrick WONG^¹, Feng GUO^²

¹ Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, China

² Mechanical Engineering Department, Qingdao Technological University, Qingdao 266033, China

Keywords:

bearing, slip, oleophobicity, thin hydrodynamic film

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GUO L, WONG P, GUO F. Identifying the optimal interfacial parameter correlated with hydrodynamic lubrication. Friction, 2016, 4(4): 347-358. https://doi.org/10.1007/s40544-016-0131-9

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Abstract

The effects of boundary (liquid/solid) slip on hydrodynamics are well recognized. However, it is extremely difficult to quantify in-situ boundary slip in a lubrication contact. Therefore, an effective interfacial parameter that is well correlated with the lubrication effect is of practical significance. This paper presents an examination of common interfacial parameters, including surface tension, contact angle, contact angle hysteresis, and a recently proposed spreading parameter. Specimen surfaces of different hydro/oleophobicity were prepared and characterized using the aforementioned interfacial parameters. These samples were further used as bearing surfaces in hydrodynamic lubrication tests. The correlations of these parameters with the measured lubricating film thickness were examined and compared. The key parameter closely related to the hydrodynamic effect was identified.

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About this article

Identifying the optimal interfacial parameter correlated with hydrodynamic lubrication

Show Author's information Hide Author's Information Liang GUO^¹(

), Patrick WONG^¹, Feng GUO^²

¹ Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, China

² Mechanical Engineering Department, Qingdao Technological University, Qingdao 266033, China

Abstract

Keywords: bearing, slip, oleophobicity, thin hydrodynamic film

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Acknowledgements

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Publication history

Received: 26 May 2016

Revised: 22 September 2016

Accepted: 13 November 2016

Published: 23 December 2016

Issue date: June 2021

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Acknowledgements

The work described in this paper was fully supported by the Research Grants Council of Hong Kong (Project No. CityU123411) and Natural Science Foundation of China (Project No. 51275252). The authors would also like to express sincere thanks to Dr. X. Zhou of SKF for providing the EGC coating in this work.

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