Influence of roughness on porous finite journal bearing with heterogeneous slip/no-slip surface

A numerical study of effect of surface roughness on finite porous journal bearing with heterogeneous slip/no-slip surface is presented. Generalized Reynolds type equations are derived for both types of uni-dimensional roughness structure. The well established Christensen stochastic theory is used to study the roughness effect. The governing differential equation can be solved by finite difference method. The effect of surface roughness parameter, slip parameter, permeability parameter and eccentricity ratio on pressure and hydrodynamic load is investigated. It has been shown that pressure and load carrying capacity increases with surface roughness for the bearing with slip/no-slip surface.