Performance of dynamically loaded journal bearings lubricated with micro-polar fluids

Based on the theory of micropolar fluids, the performance of finite dynamically-loaded journal bearings is numerically studied. The Reynolds equation for the micropolar fluids under dynamic loads is derived. Comparisons are made between the Newtonian fluids and the micropolar fluids for the effects on the oil film pressure, the minimum oil film thickness and the side leakage flow. The results show that the micropolar fluids yield an obvious increase in the oil film pressure and the oil film thickness, but a decrease in the side leakage flow.