Based on Navier-Stokes equation, computational fluid dynamics (CFD)analysis of a dimpled journal bearing was carried out using CFX module in software ANSYS. The effect of geometric parameter, density and location of dimple on tribological performances of the bearing was studied. The results indicated that, with the increase of width or length and decrease of depth of the dimples, the maximum pressure and load-carrying capacity of the bearing increase, while friction coefficient of the bearing decreases. There is an optimal density supporting the maximum load-carrying capacity or the minimum friction coefficient. The dimples located in the region existing in the maximum hydrodynamic pressure have a better effect on the above performances of a bearing.
