Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition

The objective of the present work is to study theoretically, the steady-state performance of finite hydrodynamic porous journal bearings under micropolar lubrication. The fluid pressure in porous matrix follows Darcy’s equation. In the film zone, the modified Reynolds equation is developed consideri...

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Autores principales:	Ujjal Baidya, Sanjoy Das, Santanu Das
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2019
Materias:	hydrodynamic lubrication porous bush finite journal bearing micropolar fluid steady-state characteristics 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/25f8bfe2ea7942ada0d6b98cb7caa722
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spelling	oai:doaj.org-article:25f8bfe2ea7942ada0d6b98cb7caa7222021-11-05T09:18:04ZPorous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition1881-219810.2474/trol.14.24https://doaj.org/article/25f8bfe2ea7942ada0d6b98cb7caa7222019-05-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/14/2/14_24/_pdf/-char/enhttps://doaj.org/toc/1881-2198The objective of the present work is to study theoretically, the steady-state performance of finite hydrodynamic porous journal bearings under micropolar lubrication. The fluid pressure in porous matrix follows Darcy’s equation. In the film zone, the modified Reynolds equation is developed considering micropolar lubrication theory. Both Darcy’s and modified Reynolds equations are solved using finite difference technique with successive over-relaxation method to obtain the steady-state film pressure. The steady-state performance characteristics are evaluated in terms of non-dimensional load carrying ability, friction force and friction parameter of a finite journal bearing for different values of micropolarity viz, lm and N, and varying characteristics of porous bearing. The results show that the micropolar fluid is better than the Newtonian fluid when load carrying ability and friction parameters are concerned. The slip has a beneficial effect in terms of increase in load carrying ability and reduction in friction parameter approximately to 0.7, beyond which the advantage diminishes. lm exhibits an optimal value around 10.0. In case of industrial machinery and home appliances which uses the porous bearings and where the lubricant either gets contaminated with micro-elements or dust, mixing of additives will return better results.Ujjal BaidyaSanjoy DasSantanu DasJapanese Society of Tribologistsarticlehydrodynamic lubricationporous bushfinite journal bearingmicropolar fluidsteady-state characteristicsPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 14, Iss 2, Pp 24-31 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	hydrodynamic lubrication porous bush finite journal bearing micropolar fluid steady-state characteristics Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	hydrodynamic lubrication porous bush finite journal bearing micropolar fluid steady-state characteristics Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Ujjal Baidya Sanjoy Das Santanu Das Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition
description	The objective of the present work is to study theoretically, the steady-state performance of finite hydrodynamic porous journal bearings under micropolar lubrication. The fluid pressure in porous matrix follows Darcy’s equation. In the film zone, the modified Reynolds equation is developed considering micropolar lubrication theory. Both Darcy’s and modified Reynolds equations are solved using finite difference technique with successive over-relaxation method to obtain the steady-state film pressure. The steady-state performance characteristics are evaluated in terms of non-dimensional load carrying ability, friction force and friction parameter of a finite journal bearing for different values of micropolarity viz, lm and N, and varying characteristics of porous bearing. The results show that the micropolar fluid is better than the Newtonian fluid when load carrying ability and friction parameters are concerned. The slip has a beneficial effect in terms of increase in load carrying ability and reduction in friction parameter approximately to 0.7, beyond which the advantage diminishes. lm exhibits an optimal value around 10.0. In case of industrial machinery and home appliances which uses the porous bearings and where the lubricant either gets contaminated with micro-elements or dust, mixing of additives will return better results.
format	article
author	Ujjal Baidya Sanjoy Das Santanu Das
author_facet	Ujjal Baidya Sanjoy Das Santanu Das
author_sort	Ujjal Baidya
title	Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition
title_short	Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition
title_full	Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition
title_fullStr	Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition
title_full_unstemmed	Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition
title_sort	porous hydrodynamic journal bearing analysis using micropolar fluid in steady-state condition
publisher	Japanese Society of Tribologists
publishDate	2019
url	https://doaj.org/article/25f8bfe2ea7942ada0d6b98cb7caa722
work_keys_str_mv	AT ujjalbaidya poroushydrodynamicjournalbearinganalysisusingmicropolarfluidinsteadystatecondition AT sanjoydas poroushydrodynamicjournalbearinganalysisusingmicropolarfluidinsteadystatecondition AT santanudas poroushydrodynamicjournalbearinganalysisusingmicropolarfluidinsteadystatecondition
_version_	1718444397677248512

Porous Hydrodynamic Journal Bearing Analysis Using Micropolar Fluid in Steady-State Condition

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