Quantitative Analysis of Reynolds and Navier–Stokes Based Modeling Approaches for Isothermal Newtonian Elastohydrodynamic Lubrication

Abstract When simulating elastohydrodynamic lubrication, two main approaches are usually followed to predict the pressure and fluid film thickness distribution throughout contact. The conventional approach relies on Reynolds equation describe thin lubricant film, which is coupled a Boussinesq description of linear elastic deformation solids. A more accurate, yet time-consuming method use computational dynamics in Navier–Stokes equations flow finite element solver for local contact deformation. This investigation aims at assessing both methods different lubrication conditions (EHL) regimes quantify their differences understand advantages limitations methods. shows how results from deviate three scenarios: (1) inertial contributions (Re > 1), i.e., thick films, high speed, low viscosity; (2) shear stresses leading secondary flows; (3) large deformations solids inaccuracies equation.