Piezo-Viscous Dependency and Surface Roughness Effects on the Squeeze Film Characteristics of Non-Newtonian Micropolar Fluid in Conical Bearings

Abstract

In this paper, combined effects of piezo-viscous dependency and surface roughness on the squeeze film characteristics of non-Newtonian micropolar fluid in conical bearings are presented. On the basis of Christensen's theory, two types of one dimensional structure, the longitudinal roughness and transverse patterns are considered. The stochastic modified Reynolds equation for these two types of roughness patterns is derived for micropolar fluid by taking into account variation of viscosity with pressure. Through a small perturbation technique, the analytical approximate solution for the mean fluid film pressure, load carrying capacity and squeeze film time is obtained. According to the results, the combined effects of non-Newtonian and viscosity pressure dependency provide an enhancement in the load carrying capacity and lengthen the response time for both types of roughness patterns as compared to the classical iso-viscous Newtonian lubricant case. On the whole, the squeeze film characteristics of conical bearings is improved especially for higher values of coupling parameter and viscosity parameter.

Effect of MHD with Micropolar Fluid Between Conical Rough Bearings

“…It is noted that the Hartmann number increases the pressure for both the roughness pattern. Rao et al [7] has examined the influence of viscous dependence and roughness using micropolar fluid in conical bearings. It is found that viscous dependency lengthened the load carrying capacity for both roughness patterns than that of classical iso-viscous Newtonian lubricant case.…”