Modelling hydrodynamic lubrication is crucial in the design of engineering components as well for a fundamental understanding friction mechanisms. The cornerstone thin-film flow modelling Reynolds equation -- lower-dimensional representation Stokes equation. However, derivation based on assumptions and fixed form constitutive relations, that may not generally be valid, especially when studying ...

Abstract The aim of this study is to consider the effect pressure on viscosity lubricating oil in adopted model hydrodynamic lubrication and calculated flow parameters operating a conical slide bearing. numerical analysis consisted solving Reynolds type equation for process stationary lubrication.

In this work, we are mainly interested in modelling a particular lubrication regime known as Elastohydrodynamic (EHD). The pressure generated in the conjunction is high enough to induce a significant elastic deformation of the contacting bodies. Therefore a strong coupling between hydrodynamic and elastic effects is involved. A finite element full-system approach is used to model the lubricant ...

In high speed rotating machines such as turbines and generators, vibrations of a rotating shaft often hinder the smooth operation of the machine or even cause failure. Oil whip is one of such vibrations due to oil film action of journal bearing. Its mechanism and preventive method is explained and proposed in this paper. Further theoretical and experimental analyses are made for considering hea...

Abstract Lubricated contact processes are studied using classical molecular dynamics simulations for determining the entire range of Stribeck curve. Therefore, lateral movement two solid bodies at different gap height studied. In each simulation, a rigid asperity is moved constant above flat iron surface in lubricating fluid. Both methane and decane considered as lubricants. The three main lubr...

This study aims to investigate the penetration of a projectile into a surrogate human tissue numerically, using Finite Element (FE) simulation. 20% Balistic Gelatin material (BG) is simulated with an elasto-plastic hydrodynamic constitutive law, and then impacted by steel spheres at different velocities. The results from the FE simulations are compared with existing experimental data and other ...

This contribution deals with a self-consistent description of time-mean turbulent lubricant flow, i.e. flow through a wedge-shaped gap confined by counter-sliding solid surfaces. The methods adopted are matched asymptotic expansions, where the slenderness or aspect ratio of the gap and the accordingly defined Reynolds number represent the perturbation parameters. As a remarkable result, a load-...

In this paper, an investigation of hydrodynamic performance for journal bearing lubricated by thin film is performed by three-dimensional CFD (computational fluid dynamic). Two regimes, i.e. laminar and turbulent regimes are of main interest. The sliding velocity was varied from 3000, 5000 and 10000. The numerical simulation shows that the velocity magnitude of the journal has a strong effect o...