Static and Dynamic Characteristics of Rough Porous Rayleigh Step Bearing Lubricated with Couple Stress Fluid

In tribology, the Rayleigh step bearing has maximum load capacity of any feasible geometry. Traditional tribology resources have demonstrated that an ideal geometry which maximizes capacity. Both in nature and technology, rough textured surfaces are essential for lubrication. While surface roughness enhances performance bearings as efficiency measure, it still a significant impact on load-carrying bearing. present study, we investigate dynamic characteristics with porous medium by considering squeezing action. Couple stress fluid is considered lubricant additives both film well region. Based Stokes constitutive equations couple fluids, Darcy’s law medium, stochastic theory surfaces, averaged Reynolds-type equation derived. Expressions obtained volume flow rate, steady-state characteristics, characteristics. The influence analyzed. We investigated static As result, increases (decreases) steady capacity, stiffness, damping coefficients, decreases (increases) rate negatively (positively) skewed comparison Newtonian case. results compared those smooth