... 04 10 2011 discs (structures) hydrodynamics laminar flow lubrication non-Newtonian flow hydrodynamic lubrication curved squeeze films non-Newtonian fluids inertia effects couple stress effects Squeeze films find enormous applications in lubrication technology, skeletal...

... that in the circumferential direction remained. Therefore, the cross-section of the aperture for the leakage flow in the circumferential direction was evaluated from the measured real contact area, and the leakage rates were estimated by assumption of laminar flow. The results agreed well with the measured leakage rates...

.... 96 – 102 . Arghir , M. , Roucou , N. , Helene , M. , and Frene , J. , 2003 , “ Theoretical Analysis of the Incompressible Laminar Flow in a Macro-Roughness Cell ,” ASME J. Tribol. 0742-4787 10.1115/1.1506328 , 125 ( 2 ), pp. 309 – 318 . Olver , A. V. , Fowell...

... to a dimensionless tilt value of about 0.6. A second set of curves presents the results obtained for a rotation speed set at 0, corresponding to a laminar flow. In accordance with a previous study ( 16 ), the equilibrium position is reached at a higher seal clearance when the flow is laminar and the faces aligned...

... surface elements into account. Topographic data on representative surface structures are obtained with high spatial resolution with the application of an optical interference technique. The three-dimensional velocity field past these surfaces is computed for laminar flow of Newtonian fluids...

... is shown to be effective in breaking up the hydrodynamics pressures.” In 1993, Semanate and San Andrés ( 3 ) used a constant temperature, isoviscous, bulk-flow Navier-Stokes equation model for smooth and deeply grooved laminar flow seals. Their model neglects fluid inertia in the fluid film...

... laminar flow sealing materials mechanical seal flow field CFD K−ε turbulence model fractional approach method The most practical and common method for preventing process fluid (sometimes hazardous) from leaking out of the pump into the surroundings is to isolate the rotating shaft...

...Dara W. Childs; Luis E. Rodriguez; Vito Cullotta; Adnan Al-Ghasem; Matthew Graviss Test results are presented for laminar-flow seals that are representative of buffered-flow oil seals in centrifugal compressors. The seals are short ( L ∕ D ≅ 0.21 ) , with a diameter of 117 mm and a clearance...

... of pressures on the two transverse perpendicular planes causes a significant pressure drag. It is one of the important reasons that increase the drag force. It should also be noticed that all the studies above are limited in the laminar flow, which is the usual condition of lubrication engineering...

.... Associate Editor: L. San Andre´s. 08 January 2002 22 October 2002 19 06 2003 film flow compressible flow flow simulation laminar flow lubrication mechanical contact machine bearings compressibility viscosity In hydrodynamic (or aerodynamic) lubrication theory...

...-phase flow laminar flow surface contamination adhesion impact (mechanical) With the evolution of magnetic recording disk technology, the flying height of the sliders has decreased dramatically. Currently, the minimum flying height in some products already is as low as 10 nm. With such narrow...

.... Associate Editor: M. M. Khonsari. 27 October 2002 20 January 2002 11 July 2002 19 03 2003 channel flow laminar flow shear flow flow simulation rough surfaces surface topography liquid films lubrication The basic lubrication problem is creating a separating force...

.... 1 ), ξ = P r − P f / 0.5 ρ V xm 2 . A pressure loss or rise is then characterized by a positive or a negative ξ value, respectively. Figure 8 ( a ) shows the variation of ξ with Re r / Re s , for laminar flow regimes and for different...

... 24 09 2002 film flow confined flow laminar flow nonequilibrium flow flow simulation viscosity force lubrication Borgin , P. , and Tichy , J. A. , 1985 , “ Lubricating Films of a Viscoelastic Fluid, Including Fluid Inertia, Studied by a Linearization Method ,” Int...

.... Associate Editor: A. A. Lubrecht. 23 February 2000 26 September 2000 grinding lubrication turbulence laminar flow friction hydrodynamics Proper application of grinding fluid is an important and often critical aspect of many grinding processes. In creep feed grinding...

... by the Tribology Division Feb. 14, 2000; revised manuscript received July 6, 2000. Paper No. 2000-TRIB-38. Associate Editor: J. Fre^ne. 14 Feb 2000 06 July 2000 machine bearings mechanical contact tribology lubrication Couette flow laminar flow rough surfaces heat transfer...

... December 1999 laminar flow lubrication tribology non-Newtonian fluids viscosity fluid dynamics rheology numerical analysis The pressure generation in the fluid film between two surfaces approaching each other referred to as the squeeze film phenomena plays an important role in many...

... hydrodynamics fluid dynamics Navier-Stokes equations viscosity surface waves (fluid) flow instability boundary layers laminar flow machine bearings The basic assumptions in the classical hydrodynamic theory include negligible fluid inertia forces in comparison to the viscous forces. Pinkus...