Keywords

Hydrodynamic Lubrication, Surface Modification, Load-Carrying Capacity, Friction Force, Cavitation, Transient Flow  

Track

Fluid Film Bearings I (Session 6K)

Influence of Surface Texturing in Steady-State and Transient Lubrication Regime: Two-Dimensional Numerical Simulation Using a Mass-Conserving Cavitation Algorithm 

Although surface texturing is currently regarded as a promising solution for improving the tribological performances of lubricated devices, determining the optimal geometrical patterns remains particularly difficult due to the complex nature of the physical effects that come into play. In the present study, the influence of such effects on the hydrodynamic behavior of a two-dimensional parallel slider in both steady-state and transient flow conditions is examined by using a mass-conserving cavitation algorithm. In addition to analyzing the various geometrical parameters such as texturing ratio, texture density or dimple depth, particular consideration is given to the transient effects induced by a moving textured surface. It is shown that for an applied load, the presence of micro-pockets on both surfaces of the slider can lead to an increase in nominal film thickness and a reduction of the friction force.

Authors and Company/Institution

A. Gherca, A. Fatu, M. Hajjam and P. Maspeyrot, Institut Pprime, UPR 3346 - Département Génie Mécanique et Systèmes Complexes CNRS – Université de Poitiers – ENSMA, Futuroscope Chasseneuil Cedex, France