.... 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 pressure boundary conditions are often required in lubrication. A second-order accurate method based on the extrapolation...

... aeroelasticity code to assess the flow and aeroelastic behavior of an air-riding seal. The study demonstrated that Navier–Stokes equations could be used to simulate air-riding seal aerodynamics, provided that the seal gap remained larger than 20   μ , as the assumption of continuum flow regime breaks...

..., 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...

... of Circumferentially-Grooved Liquid Seals Using the Averaged Navier-Stokes Equations ,” Trans. ASME, J. Tribol. 0742-4787 , 119 ( 3 ), pp. 556 – 567 . FLUENT 6.1 User’s Guide 2003 Fluent, Incorporated. Billy , F. , Arghir , M. , and Pineau , G. , 2006 , “ Navier-Stokes Analysis of Two...

... 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...

... that when the flow is choked, the mass flow rate is reduced and the behavior of the seal becomes unstable. seals (stoppers) compressible flow Navier-Stokes equations The increase in operating pressure, temperature, and sliding speed in gas turbines and compressors led to the development...

... 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...

...) may require a frequency-dependent [ K ] - [ C ] model. 25 02 2004 22 10 2005 machine bearings rotors matrix algebra mechanical stability Navier-Stokes equations numerical analysis Tilting pad (TP) bearings are commonly used for high performance rotating machinery...

... 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...

... considered that the angled injection linearly modifies the pressure level in both the upstream and the downstream part of the pocket. 20 02 2004 26 08 2004 machine bearings Navier-Stokes equations hydrostatics hydrodynamics flow simulation Hybrid journal bearings (Fig. 1...

...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. 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. As the model is somewhat standard in industrial flow calculations and its equation...