... bodies, while ansys fluent computational fluid dynamics software was used to model the fluid with the Navier–Stokes equations. The current model is not limited by Reynolds equation assumptions, allowing for the investigation of pressure, viscosity, and temperature variation across point contact...

... particles called a primitive. A computational fluid dynamics framework is proposed to directly simulate the capillary and hydrodynamic effects of the interfacial flow that is responsible for primitive formation. The computational model uses the volume-of-fluid method for capturing dynamic binder-air...

...@fem.unicamp.br Contributed by the Tribology Division of ASME for publication in the J ournal of T ribology . 04 06 2019 09 10 2019 10 10 2019 15 10 2019 journal bearings surface textures rotating machines stability threshold unstable vibration mode computational fluid...

... on the present results, we propose simple formulas for the design of textured micro-thrust bearings. 31 03 2011 25 07 2011 12 08 2011 14 10 2011 14 10 2011 computational fluid dynamics friction genetic algorithms machine bearings micromotors minimisation Navier-Stokes...

... compressible flow computational fluid dynamics conjugate gradient methods differential equations Newton method Reynolds equation air bearing gas bearing iterative method Simulation of an air- or gas-lubricated bearing requires the solution of compressible-fluid Reynolds equation. Due...

... of the three-dimensional, single-phase flow between a stationary and a rotating clutch plate is presented, which is capable of describing pressures and shear stress distribution for plates with radial grooved geometries. The computational fluid dynamics code FLUENT ® is used to examine the single-phase...

... and continuous phases to the total lubricant pressure and pressure gradient are functions of the oil concentration and the film thickness. The parameters used in these functions are determined by a series of computational fluid dynamics simulations. The onset of inversion and the viscosity after inversion...

... computational fluid dynamics fracture liquid films lubrication vaporisation negative squeeze behavior vaporization bubble dynamics Rayleigh–Plesset equation Lubricated contacts are a typical feature of most technical devices and machines. The dynamics of lubricants can be described...

... ) , for instance, by applying appropriate reduction or substructure methods. boundary-value problems computational fluid dynamics finite element analysis flow simulation Reynolds equation fluid film theory hydrodynamic journal bearing Jakobsson–Floberg–Olsson (JFO) boundary conditions moving mesh...

... mixed lubrication chemical mechanical polishing contact mechanics particle dynamics computational fluid dynamics abrasive wear In mixed lubrication, the load is supported by both the surface asperities and the interfacial fluid by way of its hydrodynamic pressure. When particles...

... computational fluid dynamics disc drives hard discs magnetic heads magnetic recording microchannel flow Monte Carlo methods rarefied fluid dynamics Magnetic recording has become the main technology for the storage of digital data. With the introduction of hard disk drives in consumer products...

...Markus Hartinger; Marie-Laure Dumont; Stathis Ioannides; David Gosman; Hugh Spikes In this paper a computational fluid dynamics (CFD) approach for solving elastohydrodynamic lubrication using the freely available package OPENFOAM is introduced. The full Navier–Stokes equations are solved, which...

... 2008 computational fluid dynamics hydrodynamics laminar flow machine bearings surface texture convergent surface texture pressure buildup recirculation In a previous study ( 1 ), an additional effect of pressure buildup generated by a surface texture has been identified...

... bearing and, together with bearing force models, yields a criterion for whirl instability onset. Detailed three-dimensional computational fluid dynamics calculations of the journal bearing flow have been conducted to assess the criterion. A singular behavior in whirl ratio as a function of the reduced...

... to be established. However, it is very difficult to obtain the detailed information about the flow structure from flow visualization because of a very thin bearing clearance. Therefore, we calculated the flow field using computational fluid dynamics, which can solve the Navier-Stokes equations directly...

...Gocha Chochua; Thomas A. Soulas A method is proposed for computations of rotordynamic coefficients of deliberately roughened stator gas annular seals using computational fluid dynamics. The method is based on a transient analysis with deforming mesh. Frequency-dependent direct and cross-coupled...

...Adnan Al-Ghasem, Ph.D. Candidate; G. L. Morrison; John P. Platt, Jr. The effectiveness of a computational fluid dynamics (CFD) commercial code to accurately predict the leakage rate for a windback seal was evaluated. The windback seal under consideration has a rectangular cavity and is similar...

... is predicted. The behavior of the turbulent flows with very high Reynolds number was also investigated. The physical and practical implications of the results are discussed. 02 03 2006 27 06 2006 computational fluid dynamics seals (stoppers) turbulence flow simulation Couette flow...

... clutches plates (structures) drag computational fluid dynamics The fluid motion over a single rotating plate has been studied extensively. Von Karman ( 1 ) studied the problem of an infinite disk rotating in quiescent fluid revealing the swirling flow patterns over the disk. He reduced...

... . Extension to two-dimensional bearings is straightforward. 11 01 2005 10 06 2005 13 06 2005 machine bearings surface texture perturbation theory shapes (structures) friction computational fluid dynamics New fabrication methods such as indentation, chemical etching...