... 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...

.... 0742-4787 10.1115/1.1828067 , 127 ( 1 ), pp. 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...

... element analysis hydrostatics laminar flow laminar to turbulent transitions lubricants seals (stoppers) turbulence inertia effect turbulence hydrostatic seal mechanical face seal finite element method In fluid film lubrication, two assumptions are generally made: firstly...

... 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...

... r ∕ R ratios on the order of 0.001 and have small L ∕ D ratios. Despite high pressure drops, the tight clearances net laminar flow. Their customary reaction-force/motion model has the form, 1 − { f s X f x Y } = [ k X X k X Y...

... 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 and its...

...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...

... roughness pattern still needs to be explored. 12 06 2005 16 09 2005 polymer solutions Navier-Stokes equations finite volume methods surface roughness drag reduction viscosity laminar flow The effect of surface roughness patterns on lubrication and drag force reduction has been...

.... 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...

.... machine bearings disc drives hard discs confined flow two-phase flow laminar flow surface contamination adhesion impact (mechanical) The governing equations for a particle moving in air can be written as (1) dx i dt = v i (2) m   dv i dt...

... c / λ = 0.5 , h / c = 0.5 channel flow laminar flow shear flow flow simulation rough surfaces surface topography liquid films lubrication The basic lubrication problem is creating a separating force between two closely spaced surfaces separated by a fluid...

.... 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...

... 2002 24 09 2002 film flow confined flow laminar flow nonequilibrium flow flow simulation viscosity force lubrication H r , t = film thickness at radius r , at time t H t =  ∂ H / ∂ t H r =  ∂ H...

.... 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...

... contact tribology lubrication Couette flow laminar flow rough surfaces heat transfer thermodynamics 14 Feb 2000 06 July 2000 Contributed by the Tribology Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for presentation at the STLE/ASME Tribology Conference, Seattle...

... 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...