An Analysis of Starved EHL Point Contacts with Reflow

In the starved lubrication regime, the film thickness can be much less than the fully flooded film thickness. The film thickness reduction is related to the inlet meniscus distance. The inlet meniscus and the film thickness can be computed for a given inlet film thickness distribution which is gener...

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Autor principal:	Takashi Nogi
Formato:	article
Lenguaje:	EN
Publicado:	Japanese Society of Tribologists 2015
Materias:	starved ehl point contact reflow side band capillary number amount of oil 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/af4046f3ea18414eaedf308c942a6db2
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spelling	oai:doaj.org-article:af4046f3ea18414eaedf308c942a6db22021-11-05T09:22:45ZAn Analysis of Starved EHL Point Contacts with Reflow1881-219810.2474/trol.10.64https://doaj.org/article/af4046f3ea18414eaedf308c942a6db22015-02-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/10/1/10_64/_pdf/-char/enhttps://doaj.org/toc/1881-2198In the starved lubrication regime, the film thickness can be much less than the fully flooded film thickness. The film thickness reduction is related to the inlet meniscus distance. The inlet meniscus and the film thickness can be computed for a given inlet film thickness distribution which is generally non-uniform. The inlet film thickness distribution, which is essentially the outlet film thickness distribution of the previous contact, is affected by the surface tension. In this paper, a modified Coyne-Elrod boundary condition is used to calculate the inlet film thickness distribution, taking the surface tension into account. A numerical analysis of EHL point contacts is carried out and solutions of the inlet meniscus and the film thickness are presented. At lower capillary numbers, side bands formed by reflow in the outlet region can replenish the contact owing to reflow in the inlet region. At higher capillary numbers, the side bands move away from the center of the track and the inlet distance decreases. This is a main cause of starvation in EHL point contacts. A good agreement is found between the numerical solutions and experimental results.Takashi NogiJapanese Society of Tribologistsarticlestarved ehlpoint contactreflowside bandcapillary numberamount of oilPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 10, Iss 1, Pp 64-75 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	starved ehl point contact reflow side band capillary number amount of oil Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999
spellingShingle	starved ehl point contact reflow side band capillary number amount of oil Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Takashi Nogi An Analysis of Starved EHL Point Contacts with Reflow
description	In the starved lubrication regime, the film thickness can be much less than the fully flooded film thickness. The film thickness reduction is related to the inlet meniscus distance. The inlet meniscus and the film thickness can be computed for a given inlet film thickness distribution which is generally non-uniform. The inlet film thickness distribution, which is essentially the outlet film thickness distribution of the previous contact, is affected by the surface tension. In this paper, a modified Coyne-Elrod boundary condition is used to calculate the inlet film thickness distribution, taking the surface tension into account. A numerical analysis of EHL point contacts is carried out and solutions of the inlet meniscus and the film thickness are presented. At lower capillary numbers, side bands formed by reflow in the outlet region can replenish the contact owing to reflow in the inlet region. At higher capillary numbers, the side bands move away from the center of the track and the inlet distance decreases. This is a main cause of starvation in EHL point contacts. A good agreement is found between the numerical solutions and experimental results.
format	article
author	Takashi Nogi
author_facet	Takashi Nogi
author_sort	Takashi Nogi
title	An Analysis of Starved EHL Point Contacts with Reflow
title_short	An Analysis of Starved EHL Point Contacts with Reflow
title_full	An Analysis of Starved EHL Point Contacts with Reflow
title_fullStr	An Analysis of Starved EHL Point Contacts with Reflow
title_full_unstemmed	An Analysis of Starved EHL Point Contacts with Reflow
title_sort	analysis of starved ehl point contacts with reflow
publisher	Japanese Society of Tribologists
publishDate	2015
url	https://doaj.org/article/af4046f3ea18414eaedf308c942a6db2
work_keys_str_mv	AT takashinogi ananalysisofstarvedehlpointcontactswithreflow AT takashinogi analysisofstarvedehlpointcontactswithreflow
_version_	1718444430491385856

An Analysis of Starved EHL Point Contacts with Reflow

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