It is a known fact that incorporating textures in the contact surfaces can significantly enhance bearing performances. The purpose of this paper to outline effects texture bottom profiles and contour geometries on performances hydrodynamic textured journal bearings. analysis was conducted using computational approach test eight shapes: rectangular, cylindrical, spherical, triangular (TR, T1, T2, T3) chevron. steady-state Reynolds equation for modelling behaviour thin viscous film solved...

Although emulsion pumping is a subject of growing interest, detailed analysis the fluid dynamic phenomena occurring inside these machines still lacking. Several computational investigations have been conducted to study centrifugal pumps carrying by analyzing their overall performance, but no studies involved rheological behavior such fluids. The purpose this perform performance and flow characteristics pump with volute handling emulsions oil-water mixtures at different water cuts modeled as...

Flow losses in centrifugal pumps handling non-Newtonian fluids are of great importance for design optimization, performance prediction, and energy savings. Traditional methods very limited determining due to the complex rheological behavior such fluids. This study aims investigate hydraulic degradation mechanism volute emulsions using entropy production method, focusing on influence emulsion type loss mechanism. The pump size fluid’s a is also investigated by comparing distribution two...

Cross-flow fans (CFFs) have become increasingly popular in recent years. This is due to their use several domains such as air conditioning and aircraft propulsion. They also show utility the ventilation system of hybrid electric cars. Their high efficiency performance significantly rely on design parameters. Up now, there no general approach that predicts CFFs’ performance. work describes a new methodology helps deduce CFFs turbomachinery, using both analytical modeling experimental data....

The tribological characteristic of journal bearing systems can be enhanced with the integrating textures in contact interfaces, or using lubricating effect non-Newtonian fluids. In this study, combined effects surface texturing and lubricants behavior, micropolar fluid model, on static characteristics hydrodynamic circular bearings finite length are highlighted. modified Reynolds equation lubrication theory is solved differences scheme Elrod's mass conservation algorithm, taking into account...

The performance and hydrodynamic behavior of centrifugal pumps when handling two-phase liquid-liquid flow emulsion remain relatively unexplored, although they are fundamental importance in optimizing the operating conditions these pumps. Hence, this study aims at investigating degradation a pump under by combined means analytical computational fluid dynamic (CFD) models. approach is based on internal energy loss equations while CFD models as continuous homogeneous single-phase exhibiting...

This study outlines the performances of finite-length journal bearing with textured liner, shear-thinning Rabinowitsch lubricants, and considers elastic deformation liner. The yielded nonlinear Rabinowitsch-Reynolds PDE system has been solved using finite difference method combined Elrod’s algorithm for case cylindrical textures. static performance hydrodynamic lubrication, in this case, involves different parameters such as depth texture, eccentricity ratio, factor, rheological index, etc....

In this paper, we report the computational results of coalescence two bubbles rising in a liquid at rest. The calculations where conducted parallel using open source code OpenFOAM. equations motion solved finite volume method and interface is advected fluid (VOF). predicted behavior reasonable agreement with experimental numerical obtained by other authors.

This paper deals with experimental and numerical investigations of the composites damages ductile fragile reinforcement under quasi-static indentation loading. The main goal work is to increase post-damage residual strength ductility thermoplastic composite. Two types composite laminates polypropylene (PP) matrix are tested: glass fibre laminate (GFPP) steel fine wire mesh (SWPP). specimens [0° 90°]2s stacking sequence prepared by using a compression moulding technique. Quasi-static tests...

Un montage d'usinage est un outillage indispensable pour fixer la pièce solidement à bonne position dans l'espace de travail machine outil. La conception du joue rôle important obtenir une usinée qualité. Nous avons déjà formalisé les connaissances sur prises manière pouvoir gérer tout au long processus gamme d'usinage. Maintenant nous intéressons passer modèle prise retenu solution technologique qui sera utilisée le poste travail. Cet article aborde problème modulaire point vue sa globalité...

In this paper, a liquid vapor program has been developed and applied for the study of dynamics two droplets coalescence. The underlying theoretical model makes it possible to couple state equation non ideal fluid with pressure tensor at interface uses excess free‐energy density formalism. Maxwell reconstruction procedure is reproduced by our simulation results. Laplace Gibbs‐Thomson equations are well satisfied droplet equilibrium. This proved consistency thermodynamics. As an application,...