Effect of nanoparticle additives on rough surface cylinder in line contact under TEHL with non-Newtonian lubricant

Abstract

This paper presents the results of a transient analysis of thermal elastohydrodynamic lubrication (TEHL) of a rough cylinder on a rough flat surface in line contact with non-Newtonian lubricant blended with Al 2 O 3 nanoparticles. The simultaneous systems of time-dependent modified Reynolds equation, elasticity equation and energy equation with initial conditions were solved numerically using multigrid multilevel with full approximation technique. In this study, the effect of Al 2 O 3 nanoparticle additives, surface roughness and sudden overload on TEHL of two surfaces in line contact were examined. The minimum film thickness and the pressure spike increase slightly with an increase in nanoparticle concentration. For TEHL with Al 2 O 3 nanoparticle additives, the film temperature increases very little due to thermal enhancement of nanofluids.

Effect of Nano and Micro Particle Additives on Rough Surface TEHL with Non-Newtonian Lubricant

“…Thermal conductivity and viscosity of nanofluids increase significantly with nanoparticles volume concentration presented by Murshed [7] and Chandrasekar [8]. Mongkolwongrojn [9] showed that the TEHL with Al2O3 nanoparticle additives for low slip/slide ration condition, the film temperature increases very little due to thermal enhancement of nanofluids. The multigrid algorithm is more efficient than the Newton-Raphsonmethod in solving EHL with roughness effect presented by Lubrecht [10].…”