.... A two-phase flow model using the Navier-Stokes equations and a diffuse interface approach is developed to analyze the lubricant behavior at the exit of rolling and sliding lubricated line contacts. After physical and numerical descriptions of the two-phase flow model, results are compared...

.... The bearings are modeled as micro-channels, consisting of a smooth moving wall (rotor), and a stationary wall (stator) with partial periodic rectangular texturing. The flow field is calculated from the numerical solution of the Navier-Stokes equations for incompressible isothermal flow; processing...

... are compared with the corresponding analytic and numeric solutions of the Reynolds or Navier–Stokes equations. The LBM results were satisfactory for the investigated cases. The collision operator Q in Eq. 1 has a complex integrodifferential form that can be simplified by using the Bhatnagar–Gross...

... Euler Algorithm With Unstructured Dynamic Mesh for Complex Aircraft Analysis ,” AIAA Paper No. 89-1189. aerodynamics elasticity finite element analysis gas turbines Navier-Stokes equations seals (stoppers) labyrinth seal flutter stability numerical study Gas turbines contain...

..., while neglecting additional terms crucial to obtaining accurate solutions when these assumptions are not met. In the present investigation, the polar Reynolds equation is derived from the cylindrical Navier–Stokes equations without the aforementioned assumptions, and the resulting form is compared...

...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...

... formation and contact performance. Small changes in the distribution of lubricant on the rolling track, as a result of reflow or redistribution, may have a large (local) effect on the film thickness inside the contact. Starting from the Navier–Stokes equations, the free surface thin layer flow equation...

.... Another set of references is focused on the numerical analysis of the flow by using the complete Navier-Stokes equations and a turbulence model. Reference 5 deals with the compressible flow inside the “damper” seal, while Refs. 6 7 8 study the incompressible regime in a single cell of different...

... that operate in full film conditions may be the result of micro-cavitation and/or convective inertia. To include inertia effects, the Navier–Stokes equations have to be used instead of the Reynolds equation. It has been shown in earlier work ( de Kraker et al., 2006, Tribol. Trans., in press ) that the coupled...

... 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...

...Zhaogao Luan; M. M. Khonsari The flow inside a seal chamber as induced by the influx of the flush fluid and the rotation of the primary ring is analyzed. The 3-D flow characteristic around the mating ring and the rotating ring are predicted by solving the Navier-Stokes equations in cylindrical...

... Element Method , 5th ed. , Butterworth Heinemann , Oxford, UK , Vol. 3 . 06 07 2005 12 12 2005 seals (stoppers) compressible flow Navier-Stokes equations The increase in operating pressure, temperature, and sliding speed in gas turbines and compressors led...

... dimple, representing the LST, were obtained via two different methods of analysis: a numerical solution of the exact full Navier-Stokes equations, and an approximate solution of the much simpler Reynolds equation. Comparison between the two solution methods illustrates that, despite potential large...

... mechanical stability Navier-Stokes equations numerical analysis 25 02 2004 22 10 2005 The H i j data shows a small degree of nonlinear frequency dependency which cannot be accounted for with the linear model of Eq. 1 . However, this paper shows that for this FPTP bearing...

... on the side wall of the grooves play important roles in drag force reduction. They are numerically analyzed based on the Navier-Stokes equation using the finite volume method. The viscous force on the groove’s bottom plane is far less than the force on the corresponding plane of the smooth surface...

... in order to obtain the same Reynolds number. In this case the static pressure gradient was then an output of the calculation. Two-dimensional computations are performed with a commercial finite volume CFD code FLUENT . The full Navier–Stokes equations are integrated numerically for an incompressible...

... by the Tribology Division January 3, 2002; revised manuscript received March 16, 2004. Associate Editor: S. Wu. 03 January 2002 16 March 2004 09 11 2004 compressible flow turbulence Navier-Stokes equations seals (stoppers) wear Although many labyrinth seals are designed...

... injection static working conditions by using a computational approach based on the complete Navier–Stokes equations and an appropriate turbulence model. The fact that the pockets are identical and equally spaced and the use of cyclic boundary conditions enabled the analysis of a single pocket. Moreover...

...Mihai Arghir; Jean Frene The bulk-flow equations used for inertia dominated thin-film flows is an attractive model for the analysis of circumferentially grooved annular seals because the solutions based on the numerical integration of the complete Navier-Stokes equations can be very time-consuming...

... theoretical modeling. 1 Two dimensional cross section of the analyzed hybrid journal bearing recess The numeric analysis is based on the finite volume numerical integration of the full Navier-Stokes equations 23 24 . Turbulence is modeled by using the k -ε model with logarithmic wall functions...