Publication detail

A comparison of measured film thicknesses with quantitative predictions from an elastohydrodynamic, perturbation analysis at high slide-roll ratios

HOOKE, CH., ŠPERKA, P., BAIR, S., MORALES-ESPEJEL, G.E.

Original Title

A comparison of measured film thicknesses with quantitative predictions from an elastohydrodynamic, perturbation analysis at high slide-roll ratios

Type

journal article in Web of Science

Language

English

Original Abstract

The behaviour of elastohydrodynamic contacts at high slide-roll ratios (SRR) differs markedly from that found in rolling conjunctions and at low SRRs. Behaviour is dominated by viscosity reduction due to shear-thinning and by temperature rises in the fluid and mating surfaces. These have a major influence on both the performance of smooth contacts and the behaviour of rough surfaces. This paper presents a set of experimental results for these conditions where artificial roughness in the form of transverse ridges is present. These are then compared to the results of a perturbation analysis to see whether this rapid analysis technique can adequately predict the behaviour. It is shown that very powerful feedback mechanisms exist in both the thermal and shear thinning and that these make the behaviour of surface roughness relatively insensitive to changes in fluid properties. In contrast to most previous work, real temperature, pressure and shear dependences of viscosity as measured in viscometers have been employed.

Keywords

Thermal EHL; shear thinning; surface roughness; perturbation analysis

Authors

HOOKE, CH., ŠPERKA, P., BAIR, S., MORALES-ESPEJEL, G.E.

Released

1. 4. 2021

Publisher

SAGE PUBLICATIONS LTD

Location

LONDON

ISBN

1350-6501

Periodical

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY

Year of study

235

Number

4

State

United Kingdom of Great Britain and Northern Ireland

Pages from

870

Pages to

880

Pages count

11

URL

https://journals.sagepub.com/doi/abs/10.1177/1350650120947285

BibTex

@article{BUT169792,
  author="Petr {Šperka}",
  title="A comparison of measured film thicknesses with quantitative predictions from an elastohydrodynamic, perturbation analysis at high slide-roll ratios",
  journal="PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY",
  year="2021",
  volume="235",
  number="4",
  pages="870--880",
  doi="10.1177/1350650120947285",
  issn="1350-6501",
  url="https://journals.sagepub.com/doi/abs/10.1177/1350650120947285"
}