Static Analysis of Journal Bearing with Bionanolubricants Featuring Three-Layered Nanoadditive Couple Stress Fluids

A three-layer with nanoadditive couple stress fluids is featured for biolubricants with nanoadditives. The chapter presents an analysis of load capacity and friction coefficient in a journal bearing with three-layer nanoadditive couple stress fluids. The modified Reynolds equation using different bearing/journal surface-adsorbent fluid film layer thickness ratios is derived for three-layer nanoadditive couple stress fluids. The couple stresses effects are analyzed based on Stokes' micro-continuum theory. The modified Reynolds equation is integrated to obtain the nondimensional pressure and shear stress for three-layer nanoadditive couple stress fluids. The nondimensional load capacity increases and the coefficient of friction decreases for journal bearing with three-layered nanoadditive couple stress fluids. Three-layered journal bearing performance characteristics are improved with increasing dynamic viscosity ratio of bearing/journal surface to base (core) layer and bearing/journal surface-adsorbent fluid film layer thickness ratio.