Effects of surface roughness on porous inclined slider bearings lubricated with micropolar fluids

Abstract

This paper describes a theoretical analysis of the effect of surface roughness on the hydrodynamic lubrication of one-dimensional porous inclined slider bearings with micropolar fluids. To account for more realistic situations of the non-uniform rubbing of the bearing surfaces, it is assumed that, the probability density function for the random variable characterizing the surface roughness is asymmetrical with non-zero mean. The averaged modified Reynolds type equation is derived and the closed form expressions for the bearing characteristics are obtained. The numerical computations of the results show that, the performance of the porous inclined slider bearing is improved for the micorpolar lubricants as compared to the corresponding Newtonian lubricants. Further, it is found that, the negatively skewed surface roughness improves the porous bearing performance whereas, the bearing performance suffers due to the presence of positively skewed surface roughness.