Non-Newtonian Effects on the Squeeze Film Characteristics between a Sphere and a Flat Plate: Rabinowitsch Model

Non-Newtonian Effects on the Squeeze Film Characteristics between a Sphere and a Flat Plate: Rabinowitsch Model

The use of additives (polyisobutylene, ethylene-propylene, lithium hydroxy stearate, hydrophobic silica, etc.) changes lubricants’ rheology due to which they show pseudoplastic and dilatant nature, which can be modelled as cubic stress fluid model (Rabinowitsch fluid model). The present theoretical...

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Main Authors: Udaya P. Singh, Ram S. Gupta
Format: Article
Language:English
Published: Hindawi Limited 2012-01-01
Series:Advances in Tribology
Online Access:http://dx.doi.org/10.1155/2012/571036
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spelling doaj-b17e7743076842f1bb856c8e8e64c3ea2020-11-24T23:18:13ZengHindawi LimitedAdvances in Tribology1687-59151687-59232012-01-01201210.1155/2012/571036571036Non-Newtonian Effects on the Squeeze Film Characteristics between a Sphere and a Flat Plate: Rabinowitsch ModelUdaya P. Singh0Ram S. Gupta1Department of Applied Science and Humanities, Kamla Nehru Institute of Technology, Sultanpur 228118, IndiaDepartment of Applied Science and Humanities, Kamla Nehru Institute of Technology, Sultanpur 228118, IndiaThe use of additives (polyisobutylene, ethylene-propylene, lithium hydroxy stearate, hydrophobic silica, etc.) changes lubricants’ rheology due to which they show pseudoplastic and dilatant nature, which can be modelled as cubic stress fluid model (Rabinowitsch fluid model). The present theoretical analysis investigates the effects of non-Newtonian pseudoplastic and dilatant lubricants on the squeezing characteristics of a sphere and a flat plate. The modified Reynolds equation has been derived and an asymptotic solution for film pressure is obtained. The results for the film pressure distribution, load carrying capacity, and squeezing time characteristics have been calculated for various values of pseudoplastic parameter and compared with the Newtonian results. These characteristics show a significant variation with the non-Newtonian pseudoplastic and dilatant behavior of the fluids.http://dx.doi.org/10.1155/2012/571036
collection DOAJ
language English
format Article
sources DOAJ
author Udaya P. Singh
Ram S. Gupta
spellingShingle Udaya P. Singh
Ram S. Gupta
Non-Newtonian Effects on the Squeeze Film Characteristics between a Sphere and a Flat Plate: Rabinowitsch Model
Advances in Tribology
author_facet Udaya P. Singh
Ram S. Gupta
author_sort Udaya P. Singh
title Non-Newtonian Effects on the Squeeze Film Characteristics between a Sphere and a Flat Plate: Rabinowitsch Model
title_short Non-Newtonian Effects on the Squeeze Film Characteristics between a Sphere and a Flat Plate: Rabinowitsch Model
title_full Non-Newtonian Effects on the Squeeze Film Characteristics between a Sphere and a Flat Plate: Rabinowitsch Model
title_fullStr Non-Newtonian Effects on the Squeeze Film Characteristics between a Sphere and a Flat Plate: Rabinowitsch Model
title_full_unstemmed Non-Newtonian Effects on the Squeeze Film Characteristics between a Sphere and a Flat Plate: Rabinowitsch Model
title_sort non-newtonian effects on the squeeze film characteristics between a sphere and a flat plate: rabinowitsch model
publisher Hindawi Limited
series Advances in Tribology
issn 1687-5915
1687-5923
publishDate 2012-01-01
description The use of additives (polyisobutylene, ethylene-propylene, lithium hydroxy stearate, hydrophobic silica, etc.) changes lubricants’ rheology due to which they show pseudoplastic and dilatant nature, which can be modelled as cubic stress fluid model (Rabinowitsch fluid model). The present theoretical analysis investigates the effects of non-Newtonian pseudoplastic and dilatant lubricants on the squeezing characteristics of a sphere and a flat plate. The modified Reynolds equation has been derived and an asymptotic solution for film pressure is obtained. The results for the film pressure distribution, load carrying capacity, and squeezing time characteristics have been calculated for various values of pseudoplastic parameter and compared with the Newtonian results. These characteristics show a significant variation with the non-Newtonian pseudoplastic and dilatant behavior of the fluids.
url http://dx.doi.org/10.1155/2012/571036
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AT ramsgupta nonnewtonianeffectsonthesqueezefilmcharacteristicsbetweenasphereandaflatplaterabinowitschmodel
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