An Experimental Validation of the Recently Discovered Scale Effect in Generalized Newtonian EHL

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F08%3APU79649" target="_blank" >RIV/00216305:26210/08:PU79649 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

An Experimental Validation of the Recently Discovered Scale Effect in Generalized Newtonian EHL

Original language description

New quantitative numerical simulations of the elastohydrodynamic lubrication (EHL) film forming ability of generalized Newtonian liquids have elucidated a previously unrecognized property of EHL films. The dependency of the film thickness on the scale ofthe contact is greater when the viscosity is shear dependent within the inlet. Measurements of film thickness were performed in a ball on disc experiment using balls ranging from 5.5 to 35 mm in diameter. Three liquids were investigated with varying shear dependence in the range of stress important to film forming. The experimental results confirm the previous analytical findings. Numerical simulations using the measured viscosities show that the increased scale sensitivity is substantially the resultof shear-thinning. However, the smallest scales produced films thinner than even the shear-dependent prediction, possibly indicating molecular degradation. It is quite likely that some machine components, which were designed using the eff

Czech name

Experimentální ověření vlivu velikosti třecích těles v obecném Newtonovském EHD modelu

Czech description

Článek shrnuje výsledky experimentálního ověření vlivu rozměrů třecích těles modelového kontaktu na přenositelnost získaných údajů na reálný mazaný kontakt.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JR - Other machinery industry

OECD FORD branch

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Project

<a href="/en/project/ME%20905" target="_blank" >ME 905: Effect of surface topography modifications on lubrication films efficiency to deminish friction and wear of machine parts</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2008

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Tribology Letters

ISSN

1023-8883

e-ISSN

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Volume of the periodical

33

Issue of the periodical within the volume

X

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

9

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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