...Wen-Ming Zhang; Guang Meng; Zhi-Ke Peng; Di Chen A mathematical model of gaseous slip flow in ultra-thin film gas bearings is numerically analyzed incorporating effects of surface roughness, which is characterized by fractal geometry. The Weierstrass-Mandelbrot (W-M) function is presented...

.... I. , 2000 , Engineering Rheology , Oxford University , New York , Vol. 52 , p. 592 . 02 06 2010 17 03 2011 25 07 2011 convection elongation film flow liquid films non-Newtonian flow shear flow slip flow viscosity non-Newtonian lubricant viscoelastic...

... Kn 0 has little influence on the load capacity and attitude angle for micro gas journal bearings. 05 08 2008 21 07 2009 24 09 2009 finite difference methods flow simulation machine bearings microfluidics micromechanical devices slip flow viscosity...

... surface roughness hydrodynamics slip flow One effect of increasing the lyophobicity of the sapphire surface may be to reduce the attractive, capillary force between the surfaces. This would reduce the total effective load on the contact, producing a friction reduction due to a consequent increase...

... Solid fraction versus height from theoretical model Solid fraction versus height from CA model Roughness factor versus slip from GKL model and CA model 08 03 2005 11 12 2005 lubricants cellular automata granular flow lubrication stiction slip flow...

... with different rheological models and different input parameters may be slightly different. However, all the results illustrate the existence of the inlet dimple when running under large slide-roll ratios. lubrication elastodynamics hydrodynamics stratified flow slip flow lubricating oils liquid...

.... , and Mezghani , A. , 1995 , “ Slip flow of Polybutadiene Through Flourinated Dies ,” J. Non-Newtonian Fluid Mech. , 59 , pp. 11 – 30 . Brochard , F. , and de Gennes , P. G. , 1992 , “ Shear-Dependent Slippage at a Polymer/Solid Interface ,” Langmuir , 8 , pp. 3033 – 3037 . Lau , H...

..., 2002. Associate Editor: C.-P. R. Ku. lubrication slip flow flow simulation Knudsen flow kinetic theory molecule-surface impact stress analysis Among all the existing compressible lubrication equations, the FK model 1 was previously believed to give the most accurate results...

...-thin Film Gas Lubrication Using 1.5-order Slip-flow Model and Considering Surface Accommodation Coefficient ,” ASME J. Tribol. , 115 , pp. 289 – 294 . Fukui , S. , and Kaneko , R. , 1988 , “ Analysis of Ultra-Thin Gas Film Lubrication Based on Linearized Boltzmann Equation: First...

... July 6, 2001. Associate Editor: L. San Andre´s. 02 February 2001 06 July 2001 lubrication magnetic disc storage rough surfaces slip flow The important aspect of lubrication with very thin gas films in case of roughness is the possible breakdown of the Reynolds equation...

... friction plastic deformation materials preparation slip flow A second friction (Region II) regime in Fig. 7 appears to develop when 1.0 < τ k < 1.7 . Region II is characterized by a substantial decrease in the friction coefficient with increasing τ k...

... is reduced, since the air inside the pump housing is pumped out by herringbone-grooved viscous vacuum action. In this paper, the theoretical pumping characteristic of this bearing is investigated, using the narrow-groove theory and accounting for first-order slip flow. The effects of various design...

... January 1999 01 June 1999 powders lubrication granular flow machine bearings tribology shear deformation slip flow Recent advances in high-temperature powder lubrication have raised a considerable amount of interest in understanding the flow characteristics of granular powder...