Title: Steady-state optimisation of a groove texture with different oil film thickness

Authors: Yuncai Zhao; Fei Yang

Addresses: School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi, 341000, China ' School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou Jiangxi, 341000, China

Abstract: The lubricant film thickness is not stable in practical applications of lubricate. This work focuses on hydrodynamic lubrication performance of surface groove texture for a non-stable oil film thickness and use a two-dimensional computational fluid dynamics (CFD) model base on the Navier-Stokes equation to discuss the relation among groove depth D, groove width W and lubricant film thickness H with a specified sliding speed. It is found that there exist optimum design parameters of surface groove texture for a non-stable oil film thickness. The parameters are characterised by groove width W and groove depth D and its values are respectively 0.5 and 0.7. In addition, the optimum value of groove depth D is strongly affected by groove width. When W varies between 0.1 and 0.8, for example, the optimum's depth D ranges from 0.5 to 1. But it has little effect of lubricant film thickness on the optimum value of groove depth.

Keywords: lubricant film thickness; surface groove texture; hydrodynamic lubrication performance; CFD; computational fluid dynamics; simulation; steady-state optimisation; oil film thickness; Navier-Stokes equations; groove depth; groove width.

DOI: 10.1504/IJSURFSE.2015.072050

International Journal of Surface Science and Engineering, 2015 Vol.9 No.5, pp.385 - 394

Received: 02 Oct 2013
Accepted: 21 Jul 2014

Published online: 30 Sep 2015 *

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