Variable Viscosity Effects in Hydrostatic Films: The Adiabatic Transformation

1971 ◽  
Vol 93 (1) ◽  
pp. 151-154 ◽  
Author(s):  
R. R. Donaldson
Keyword(s):  
Pressure Distribution ◽  
Energy Equation ◽  
Variable Viscosity ◽  
Film Pressure ◽  
Hydrostatic Bearing ◽  
Viscosity Effects ◽  
Pressure Profiles ◽  
Adiabatic Transformation ◽  
Constant Viscosity ◽  
Adiabatic Energy

A transformation is presented whereby a hydrostatic film pressure distribution p(x, y) for constant viscosity ν is transformed into a solution assuming ν = ν(p, T) in which T(x, y) satisfies the adiabatic energy equation. The effects of variable viscosity on film pressure profiles and load capacities are demonstrated by applying the transformation to simple hydrostatic bearing film geometries.

Film pressure distribution in water-lubricated rubber journal bearings

2005 ◽  
Vol 219 (2) ◽  
pp. 125-132 ◽  
Author(s):  
D. L. Cabrera ◽  
N. H. Woolley ◽  
D. R. Allanson ◽  
Y. D. Tridimas
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Pressure Distribution ◽  
Reasonable Agreement ◽  
Journal Bearings ◽  
Experimental Results ◽  
Film Pressure ◽  
Pressure Profiles ◽  
Lubricant Viscosity ◽  
Viscosity Changes

Measurements of fluid film pressures were made on water-lubricated rubber journal bearings. The measurements indicated that the film pressure profiles are very different from those of conventional rigid bearings. The relatively low film pressures caused significant rubber deflections but were too low to produce lubricant viscosity changes. Integration of the pressure in the bearings showed that they operate in the regime of mixed lubrication. The behaviour of the bearings was theoretically investigated using computational fluid dynamics. There was reasonable agreement between computational fluid dynamics and experimental results.

Influences of Recess Geometry and Restrictor Dimension on Flow Patterns and Pressure Distribution of Hydrostatic Bearings

2007 ◽  
Author(s):  
Cheng-Hsien Chen ◽  
Yuan Kang ◽  
Yeon-Pun Chang ◽  
De-Xing Peng ◽  
Ding-Wen Yang
Keyword(s):  
Pressure Distribution ◽  
Stokes Equations ◽  
Flow Patterns ◽  
Lubricant Film ◽  
Navier Stokes ◽  
Width Ratio ◽  
Navier Stokes Equations ◽  
Hydrostatic Bearing ◽  
Lubricant Flow ◽  
Land Width

This paper studies the influences of recess geometry and restrictor dimensions on the flow patterns and pressure distribution of lubricant film, which are coupled effects of hybrid characteristics of a hydrostatic bearing. The lubricant flow is described by using the Navier-Stokes equations. The Galerkin weighted residual finite element method is applied to determine the lubricant velocities and pressure in the bearing clearance. The numerical simulations will evaluate the effects of the land-width ratio and restriction parameter as well as the influence of modified Reynolds number and the jet-strength coefficient on the flow patterns in the recess and pressure distribution in lubricant film. On the basis of the simulation drawn from this study, the simulated results are expected to help engineers make better use of the design of hydrostatic bearing and its restrictors.

Variable viscosity effects for the steady flow past a sphere

2019 ◽  
Vol 31 (11) ◽  
pp. 113105
Author(s):  
Kostas D. Housiadas ◽  
Antony N. Beris
Keyword(s):  
Steady Flow ◽  
Variable Viscosity ◽  
Viscosity Effects ◽  
Flow Past ◽  
Flow Past A Sphere
Sign in / Sign up

Export Citation Format

Share Document