... 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...

... 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...

... the number of nodes in each direction by the same factor. It can be seen that excellent estimates of all the quantities presented in Fig. 5 can be achieved with a very coarse mesh. Comparison of experimental and numerical pressure distributions in the laminar flow between two stationary misaligned...

... 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...

... enough to create separate lands within the seal, creating a zero or negligible pressure perturbation within the groove. Test results show that even the deepest groove depth tested is not deep enough to satisfy this assumption. annular seals compressors laminar flow These grooves were much...

... 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...

... equation using the finite volume method, and analysis of the drag force reduction effect of different surface roughnesses is also given. It should be noted that all the calculations are under the condition of laminar flow. The geometry models of the surface with grooves are shown schematically...

... locally, the Reynolds equation may not be accurate, and the Stokes equations should be used to model the flow. film flow compressible flow flow simulation laminar flow lubrication mechanical contact machine bearings compressibility viscosity 08 January 2002 22 October 2002...

... by the Tribology Division February 26, 2002; revised manuscript received August 6, 2006. Associate Editor: J. L. Streator. 26 February 2002 06 August 2006 19 03 2003 machine bearings disc drives hard discs confined flow two-phase flow laminar flow surface contamination adhesion...

.... 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...

... by the Tribology Division February 26, 2001; revised manuscript received July 18, 2002. Associate Editor: J. L. Streator. 26 February 2001 18 July 2002 19 03 2003 pressure machine bearings Navier-Stokes equations turbulence laminar flow mechanical engineering The problem...

... by the curvature and inertia effects. film flow confined flow laminar flow nonequilibrium flow flow simulation viscosity force lubrication Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY . Manuscript received by the Tribology Division March 26, 2000...

... laminar flow theory p max tur = maximum pressure from turbulent flow theory Q noz = nozzle flow rate r = wheel radius R a = roughness average Re = Reynolds number, Re = V s h g / ν Re...

... Editor: J. Fre^ne. 14 Feb 2000 06 July 2000 machine bearings mechanical contact tribology lubrication Couette flow laminar flow rough surfaces heat transfer thermodynamics 2001 ASME ...

... 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...