Abstract
Dimple structure has been known to act as a lubricant reservoir, generating hydrodynamic pressure and load-carrying capacity to help reducing friction for sliding surface. In this paper, a three-dimensional CFD analysis was done on a simplified model resembling a piston skirt surface textured with dimple. The influence of dimple area ratio (alpha(r)) on pressure distribution in hydrodynamic lubrication was investigated. Largest contribution can be seen for alpha(r) of 8.1% by which an increase of 102% in load carrying capacity was obtained as compared to untextured surface with 0% area ratio.