Comparative study between newtonian and non newtonian lubricants in journal bearing using variable viscosity

الملخص EN

The focus of this investigation is to study the effect of lubricant viscosity variation on the performance of the finite width plain journal bearing with Newtonian and non–Newtonian lubricants’ in the steady state operation.

Conventional and modified Reynolds equations in two dimensional forms are solved numerically.

The change in viscosity due to temperature variation, using adiabatic solution, is taken into account.

The results of this work on Newtonian lubricant show that the viscosity decreases under, at the same load parameter, and causes a decrease in the sheer force and an increase in the side leakage flow rate and eccentricity ratio.

For the non-Newtonian lubricant, at the same nonlinearity factor, the side leakage flow rate increases due to viscosity variation, while the load capacity and shear force are decrease.