Table of Contents
Conference Papers in Science
Volume 2014 (2014), Article ID 324615, 5 pages
http://dx.doi.org/10.1155/2014/324615
Conference Paper

Study of Rheological Properties of Industrial Lubricants

1Department of Physics, Chandigarh University, Chandigarh, Punjab 160017, India
2Department of Physics, University of Petroleum and Energy Studies, Dehradun 248007, India

Received 11 February 2014; Accepted 11 March 2014; Published 14 May 2014

Academic Editors: R. K. Shivpuri and G. N. Tiwari

This Conference Paper is based on a presentation given by Gagan Anand at “National Conference on Advances in Materials Science for Energy Applications” held from 9 January 2014 to 10 January 2014 in Dehradun, India.

Copyright © 2014 Ajay Vasishth et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The most important rheological parameter for lubricants is viscosity as it also affects the tribological properties like friction between interacting surfaces and wear. This research intends to study the relationship between viscosity and temperature at different shear rates for multiple grades of three different categories of lubricants used for different applications viz. L1: MG20W50 (engine oil), L2: SAE20W50 (engine oil), L3: MC20W50 (mineral engine oil), L4: EP90 (gear oil), and L5: DXTIII (steering fluid). Constant high dynamic viscosity, shear stress, and low compressibility at different temperatures in multigrade as well as single grade industrial oil will help to maintain the surface film over the period of time and hence the reduction in wear. The dynamic viscosity of these chosen samples has been measured experimentally in temperature range of 20 to 50°C. The measurements have been extended to observe the dependence of shear rate, time, and temperature on the dynamic viscosity. All the samples are observed to behave like Newtonian fluids in the entire temperature range of study. Further, all samples seem to obey the Arrhenius relationship with temperature. Shear stress shows linear variation with shear rate exhibiting uniform viscosity which is substantiated by almost no variation in dynamic viscosity with shear rate for value above 5 per second.