A high-shear capillary viscometer was used to determine the viscosity of mineral oil lubricants containing an olefin copolymer up to shear rates of a million reciprocal seconds. Comprehensive measurements were conducted for a range of polymer concentrations from 1–3 wt percent polymer and a temperature range of 38–120° C. The experimental technique utilizes a theoretical analysis procedure to handle the complications associated with viscous heating, the influence of pressure on the viscosity, and the excess pressure drop which occur at the entrance and exit of the capillary. The viscosity of the polymer solutions is determined over the complete range of shear rate starting from the lower Newtonian limit, through the shear-thinning region, and finally, the Newtonian behavior at high shear rates. It is shown that the standard ASTM plot for viscosity-temperature behavior can be used to correlate the viscous behavior for a given polymer concentration over this broad range of shear rates and shear stresses.
Skip Nav Destination
Article navigation
July 1990
Research Papers
The Viscous Behavior of Polymer Modified Lubricating Oils Over a Broad Range of Temperature and Shear Rate
C. S. Peter Wu,
C. S. Peter Wu
Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802
Search for other works by this author on:
T. Melodick,
T. Melodick
Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802
Search for other works by this author on:
S. C. Lin,
S. C. Lin
Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802
Search for other works by this author on:
J. L. Duda,
J. L. Duda
Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802
Search for other works by this author on:
E. E. Klaus
E. E. Klaus
Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802
Search for other works by this author on:
C. S. Peter Wu
Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802
T. Melodick
Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802
S. C. Lin
Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802
J. L. Duda
Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802
E. E. Klaus
Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802
J. Tribol. Jul 1990, 112(3): 417-425 (9 pages)
Published Online: July 1, 1990
Article history
Received:
April 26, 1989
Revised:
December 4, 1989
Online:
June 5, 2008
Citation
Wu, C. S. P., Melodick, T., Lin, S. C., Duda, J. L., and Klaus, E. E. (July 1, 1990). "The Viscous Behavior of Polymer Modified Lubricating Oils Over a Broad Range of Temperature and Shear Rate." ASME. J. Tribol. July 1990; 112(3): 417–425. https://doi.org/10.1115/1.2920276
Download citation file:
Get Email Alerts
Related Articles
High Shear Stress Behavior of Some Representative Lubricants
J. of Lubrication Tech (July,1975)
The Rheology of Lubricants at High Shear Rates
J. Tribol (October,1993)
Elastohydrodynamic Film Forming With Shear Thinning Liquids
J. Tribol (April,1998)
Related Proceedings Papers
Related Chapters
Shear Stresses Imposed on Oils During Low-Temperature Starting
Low Temperature Lubricant Rheology Measurement and Relevance to Engine Operation
Thermodynamic Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
The Special Characteristics of Closed-Cycle Gas Turbines
Closed-Cycle Gas Turbines: Operating Experience and Future Potential