Lubricant Rheological Behavior Effect Analysis on the Performance of Finite Porous Self- Lubricating Journal Bearings

In this paper, the hydrodynamic lubrication of finite porous self-lubricating journal bearings is investigated taking into account the rheological lubricant behavior effect. The modified Reynolds equation is derived by considering both the fluid flow in the porous matrix and the lubricant rheologica...

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Bibliographic Details
Published in:Journal of Applied Fluid Mechanics 2018-11, Vol.11 (6), p.1557-1568
Main Authors: Malki, M., Larbi, S., Boubendir, S., Bennacer, R.
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Differential equations
Engineering Sciences
Finite difference method
Fluid flow
Hydrodynamic lubrication
Porous journal bearing
Non-Newtonian fluid
Power law
Journal bearings
Lubricants
Lubricants & lubrication
Newtonian fluids
Porous media
Porous media flow
Pseudoplasticity
Reynolds equation
Rheological properties
Rheology
Self lubricating bearings
Static characteristics
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Summary:In this paper, the hydrodynamic lubrication of finite porous self-lubricating journal bearings is investigated taking into account the rheological lubricant behavior effect. The modified Reynolds equation is derived by considering both the fluid flow in the porous matrix and the lubricant rheological behavior where Darcy’s law and power- law model were used. Governing differential equations were solved numerically using the finite difference method. Static characteristics are obtained by considering three types of lubricants: pseudo-plastic, dilatant and Newtonian fluids. Obtained results showed that the power law index, n, has important effects on the performance of porous and non-porous bearings. An improvement in the fluid bearing characteristics (load capacity, pressure) is observed for dilatant fluids (n>1) while these characteristics decreased for pseudo-plastic fluids (n
ISSN:1735-3572
1735-3645
DOI:10.29252/jafm.11.06.28883