2013
DOI: 10.1155/2013/212568
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Journal Bearings Lubrication Aspect Analysis Using Non-Newtonian Fluids

Abstract: The aim of this work is related to an analysis of journal bearings lubrication using non-Newtonian fluids which are described by a power-law model. The performance characteristics of the journal bearings are determined for various values of the non-Newtonian power-law index " " which is equal to: 0.9, 1, and 1.1. Obtained numerical results show that for the dilatant fluids (> 1), the load-carrying capacity, the pressure, the temperature, and the frictional force increased while for the pseudo-plastic fluids (<… Show more

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Cited by 21 publications
(15 citation statements)
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“…Fig 5 demonstrates the connection between the shear stress (τ) and shear rate (γ) which is straight as the shear rate increases [ 32 ]. In a Newtonian liquid, if the rate, load and temperature increase, which lead to the increase of the rate of diffusion of oil molecules, interaction with surfaces and number of active sites; moreover, Newtonian liquids are utilized to increase the biolubricants VI by including new branches in synthesized compounds [ 33 ].…”
Section: Resultsmentioning
confidence: 99%
“…Fig 5 demonstrates the connection between the shear stress (τ) and shear rate (γ) which is straight as the shear rate increases [ 32 ]. In a Newtonian liquid, if the rate, load and temperature increase, which lead to the increase of the rate of diffusion of oil molecules, interaction with surfaces and number of active sites; moreover, Newtonian liquids are utilized to increase the biolubricants VI by including new branches in synthesized compounds [ 33 ].…”
Section: Resultsmentioning
confidence: 99%
“…It is considered that the pressure at the bearing edge is zero and the cavitation has occurred at ambient temperature. The pressure boundary conditions in dimensionless form can be presented as 4,18,21 …”
Section: Theoretical Considerationsmentioning
confidence: 99%
“…In their research, the effect of viscoelasticity and the minimum oil film thickness on the lubrication characteristics including velocity and pressure distribution were investigated. Nessil et al 43 studied both the heat transfer and hydrodynamic characteristics of journal bearings using the powerlaw model. They understood that load capacity, pressure distribution, temperature, and friction force for a dilatant fluid are higher than a pseudo-plastic fluid.…”
Section: Introductionmentioning
confidence: 99%