The Combined Effect of Magnetic Fluids With Couple Stresses, Variable Viscosity and Velocity-Slip on the Lubrication of Finite Journal Bearings

Abstract

In this paper, we examine the combined effect of a non-Newtonian couple-stress lubricant, and a magnetic fluid, together with velocity-slip and piezo-viscosity, has on the lubrication characteristics of a finite journal bearing. Using the Stokes micro-continuum theorem and the Barus formula with an artificial (homogeneous) slip surface, we investigate the load-carrying ability, pressure distribution, and frictional coefficient of the bearing. Our results indicate that the piezo-viscosity parameter improves the maximum magnetic and hydrodynamic pressures of the journal bearing. The combined effect also significantly enhances the bearing characteristics.

Generalized ferrofluid based lubrication equation and its application to porous journal bearing

“…Most of engine bearings are hydrodynamic journal bearings. The following are some recent references [4–13] of different journal bearings from different viewpoints using FFs as lubricant.…”

“…Dass et al. [12] studied combined effect of MFs with couple stresses together with variable viscosity and slip velocity on the lubrication of finite journal bearing. The results show that viscosity improves the maximum magnetic and hydrodynamic pressures of the journal bearing.…”