In this paper, the procedure to achieve an accurate deformation model of a total hip replacement (THR) was proposed with aim obtain numerical tool be simply merged into THR elasto-hydrodynamic computational synovial lubrication algorithms. The approach based on Finite Element Method (FEM) and developed in Matlab code, allowing definition influence matrix boundary conditions vector. It works lin...

The hydrodynamic force experienced by a spherical-cap drop moving on a solid surface is obtained from two approximate analytical solutions and used to predict the quasi-steady speed of the drop in a wettability gradient. One solution is based on approximation of the shape of the drop as a collection of wedges, and the other is based on lubrication theory. Also, asymptotic results from both appr...

This paper presents the application of the method of generalized differential quadrature (GDQ) for the analysis of hydrodynamic thrust bearings. GDQ is a simple, efficient, high-order numerical technique and it uses the information on all grid points to approach the derivatives of the unknown function. The effectiveness of the solution technique is verified by comparing the GDQ computed results...

A theoretical investigation has been made of core-annular flow: the flow of a high-viscosity liquid core surrounded by a low-viscosity annular liquid layer through a horizontal pipe. Special attention is paid to the question how the buoyancy force on the core, caused by a possible density difference between the core and the annular layer, is counterbalanced. From earlier studies it is known tha...

A comprehensive analysis of the Adhesion-Deformation, Elasto-hydrodynamic and Hydrodynamic friction models is presented, which describe different modes lubrication in accordance with Stribeck curve. The main provisions these are considered conjunction Langmuir-BET theory adsorption Hertz's elastic-deformation curvilinear contacts. It shown that revealed contradictions require their resolution, ...

Abstract The lubricating layer located between the rolling bodies plays a crucial role in ensuring service life of bearings. Calculating contact with each other taking into account their compliance and lubrication parameters is complex elastic-hydrodynamic problem, for solution which computer programs are usually used. paper proposes hybrid approach based on separate elastic hydrodynamic proble...