Static Analysis of Finite Hydrodynamic Journal Bearing in Turbulent Regime with Non-Newtonian Lubricant

The aim of the present paper is to investigate and predict the static performance of finite journal bearing in turbulent flow condition considering non-Newtonian lubrication. The Navier-Stokes equation has been modified considering turbulent as well as non-Newtonian lubrication and is solved for ste...

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Autores principales:	Sandeep Soni, D. P. Vakharia
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2015
Materias:	finite journal bearing static characteristics finite element method turbulence non-newtonian lubricant Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/ce31b425c1c04a89b94ef73a2317e596
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spelling	oai:doaj.org-article:ce31b425c1c04a89b94ef73a2317e5962021-11-05T09:22:20ZStatic Analysis of Finite Hydrodynamic Journal Bearing in Turbulent Regime with Non-Newtonian Lubricant1881-219810.2474/trol.10.246https://doaj.org/article/ce31b425c1c04a89b94ef73a2317e5962015-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/10/4/10_246/_pdf/-char/enhttps://doaj.org/toc/1881-2198The aim of the present paper is to investigate and predict the static performance of finite journal bearing in turbulent flow condition considering non-Newtonian lubrication. The Navier-Stokes equation has been modified considering turbulent as well as non-Newtonian lubrication and is solved for steady state parameters. Ng and Pan’s linear turbulence model is utilised in the analysis. The momentum and continuity equations in cylindrical coordinates representing the flow field in the clearance space of a finite circular journal bearing using a Newtonian lubricant were solved by the finite element method. The non-Newtonian lubrication effect is introduced by modifying the viscosity term using the cubic shear stress law in each iteration. In this paper, the effect of turbulence and non-Newtonian lubrication has been determined by solving the modified Navier-Stokes equations obtained by the application of linear theory proposed by Ng and Pan and using the cubic shear stress law model simultaneously. The modified Navier-Stokes equations, in cylindrical coordinates, have been solved by finite element method using Galerkin's technique and a suitable iteration procedure. Steady-state performance characteristics of a finite circular journal bearing have been analysed in terms of Sommerfeld number, load carrying capacity, friction coefficient variable, temperature rise parameter and total flow at various eccentricities for different Reynolds numbers up to 13300 and various values of non-linear factor of cubic shear stress law of non-Newtonian model. Computed results have been compared with the published results obtained by linearized theory of Ng and Pan and cubic shear stress law of non-Newtonian lubrication. The results obtained revealed better performance in turbulent regime as compared to laminar condition for cubic shear stress non-Newtonian model.Sandeep SoniD. P. VakhariaJapanese Society of Tribologistsarticlefinite journal bearingstatic characteristicsfinite element methodturbulencenon-newtonian lubricantPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 10, Iss 4, Pp 246-261 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	finite journal bearing static characteristics finite element method turbulence non-newtonian lubricant Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	finite journal bearing static characteristics finite element method turbulence non-newtonian lubricant Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Sandeep Soni D. P. Vakharia Static Analysis of Finite Hydrodynamic Journal Bearing in Turbulent Regime with Non-Newtonian Lubricant
description	The aim of the present paper is to investigate and predict the static performance of finite journal bearing in turbulent flow condition considering non-Newtonian lubrication. The Navier-Stokes equation has been modified considering turbulent as well as non-Newtonian lubrication and is solved for steady state parameters. Ng and Pan’s linear turbulence model is utilised in the analysis. The momentum and continuity equations in cylindrical coordinates representing the flow field in the clearance space of a finite circular journal bearing using a Newtonian lubricant were solved by the finite element method. The non-Newtonian lubrication effect is introduced by modifying the viscosity term using the cubic shear stress law in each iteration. In this paper, the effect of turbulence and non-Newtonian lubrication has been determined by solving the modified Navier-Stokes equations obtained by the application of linear theory proposed by Ng and Pan and using the cubic shear stress law model simultaneously. The modified Navier-Stokes equations, in cylindrical coordinates, have been solved by finite element method using Galerkin's technique and a suitable iteration procedure. Steady-state performance characteristics of a finite circular journal bearing have been analysed in terms of Sommerfeld number, load carrying capacity, friction coefficient variable, temperature rise parameter and total flow at various eccentricities for different Reynolds numbers up to 13300 and various values of non-linear factor of cubic shear stress law of non-Newtonian model. Computed results have been compared with the published results obtained by linearized theory of Ng and Pan and cubic shear stress law of non-Newtonian lubrication. The results obtained revealed better performance in turbulent regime as compared to laminar condition for cubic shear stress non-Newtonian model.
format	article
author	Sandeep Soni D. P. Vakharia
author_facet	Sandeep Soni D. P. Vakharia
author_sort	Sandeep Soni
title	Static Analysis of Finite Hydrodynamic Journal Bearing in Turbulent Regime with Non-Newtonian Lubricant
title_short	Static Analysis of Finite Hydrodynamic Journal Bearing in Turbulent Regime with Non-Newtonian Lubricant
title_full	Static Analysis of Finite Hydrodynamic Journal Bearing in Turbulent Regime with Non-Newtonian Lubricant
title_fullStr	Static Analysis of Finite Hydrodynamic Journal Bearing in Turbulent Regime with Non-Newtonian Lubricant
title_full_unstemmed	Static Analysis of Finite Hydrodynamic Journal Bearing in Turbulent Regime with Non-Newtonian Lubricant
title_sort	static analysis of finite hydrodynamic journal bearing in turbulent regime with non-newtonian lubricant
publisher	Japanese Society of Tribologists
publishDate	2015
url	https://doaj.org/article/ce31b425c1c04a89b94ef73a2317e596
work_keys_str_mv	AT sandeepsoni staticanalysisoffinitehydrodynamicjournalbearinginturbulentregimewithnonnewtonianlubricant AT dpvakharia staticanalysisoffinitehydrodynamicjournalbearinginturbulentregimewithnonnewtonianlubricant
_version_	1718444437170814976

Static Analysis of Finite Hydrodynamic Journal Bearing in Turbulent Regime with Non-Newtonian Lubricant

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