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United States Department of Agriculture

Agricultural Research Service

Research Project: BIO-BASED LUBRICANTS FROM FARM-BASED RAW MATERIALS

Location: Bio-oils Research Unit

Title: Density and viscosity of lipids under pressure

Authors
item Bantchev, Grigor
item Biresaw, Girma

Submitted to: Annual Meeting and Expo of the American Oil Chemists' Society
Publication Type: Abstract Only
Publication Acceptance Date: November 12, 2013
Publication Date: April 28, 2013
Citation: Bantchev, G.B., Biresaw, G. 2013. Density and viscosity of lipids under pressure [abstract]. Annual Meeting and Expo of the American Oil Chemists' Society. p. 53.

Technical Abstract: There is a lack of data for the viscosity of lipids under pressure. The current report is a part of the effort to fill this gap. The viscosity, density, and elastohydrodynamic film thicknesses of vegetable oil (HOSuO) were investigated. Pressure–viscosity coefficients (PVC) of HOSuO at different temperatures were calculated from measured film thickness data using the Hamrock-Dowson method and compared to values estimated from literature data. Literature pressure-density and viscosity-temperature data for oils with high-oleic acid group content were analyzed using the Tait and Casalini et al. models. The available viscosity data was presented as a function of a single scaling variable: (T*V3.2), where T is the absolute temperature and V is the molecular volume of the oil. The PVC values calculated from the literature data using the scaling model showed a reasonable agreement with that from film thickness data from this work.

Last Modified: 8/22/2014
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