Pressure and temperature dependence of the density of liquid lubricants

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)58-63
Journal / PublicationWear
Volume201
Issue number1-2
Publication statusPublished - 15 Dec 1996

Abstract

A theoretical model describing the influence of temperature T and pressure p on the density of liquid lubricants is described. It is based on the molecular interaction theory expressed in the van der Waals equation of state. Theoretical results for two different kinds of liquid lubricants were obtained. They correlate well with data measured by different experimental techniques. Characteristics of the p-T density curves including glass transition and flash point are correctly predicted by the model The model contains three coefficients which can be deduced from low pressure and low temperature data that can easily be measured by conventional techniques. The model is not only valid under low pressure and temperature conditions but it also corresponds accurately with high pressure and high temperature results. The paper presents two cases for pressures up to 1.2 GPa and for temperatures up to and higher than the flash points of the lubricants. Further, it is shown that the model can be used for both mineral oils and synthetic oils.

Research Area(s)

  • Density, Elastohydrodynamic lubrication, Equation of state, Liquid lubricants, Pressure, Temperature

Citation Format(s)

Pressure and temperature dependence of the density of liquid lubricants. / Wong, P. L.; Wang, R.; Lingard, S.

In: Wear, Vol. 201, No. 1-2, 15.12.1996, p. 58-63.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review