The aim of this work is related to an analysis of journal bearings lubrication, using non Newtonian fluids, which are described by a power-law model. The performance characteristics are obtained for various values of the non Newtonian power-law index ‘’n’’ that is equal to: 0.9, 1 and 1.1. Numerical results indicate that for dilatants fluids (n > 1), the load-carrying capacity, the pressure, the temperature, and the frictional force may be greatly increased, while for the pseudo- plastic fluids (n < 1), they all decrease. The thermal effects are found to be more pronounced at higher values of the flow behavior index ‘’n’’. The results obtained in this study are compared to those obtained by others. A good agreement is observed between them. 

RTC 009