An optimum design model for textured surface with elliptical-shape dimples under hydrodynamic lubrication

The influence of surface texture in the form of the elliptical-shape dimples with various depths, diameters, area ratios and different operation parameters on friction coefficient has been investigated under conditions of hydrodynamic lubrication. The results show that, the larger the optimum diameter, the larger the corresponding optimum depth becomes; the optimum area ratio is not bound up with the texture parameters and operating parameters; the optimum depth increased while the optimum diameter decreased as the velocity became larger and the load became smaller. A model for the optimum design of textured surface was built and then validated by the experiments.

► Optimal design model for parameters of surface texture is established;
► Optimal diameter increases with the increase of the optimal depth;
► Optimum depth increases as velocity becomes larger and load gets smaller;
► Optimum diameter decreases as velocity gets larger and load gets smaller.