This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Understanding Soot Mediated Oil Thickening Through Designed Experimentation Part 3: An Improved Approach to Drain Oil Viscosity Measurements - Rotational Rheology
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 01, 1997 by SAE International in United States
Annotation ability available
Lubricating oil viscosity is commonly measured by the kinematic method as outlined in ASTM 0445. This method is also used to measure drain oil viscosity as an indicator of soot induced thickening. Drain oils can contain solid particles and exhibit non-Newtonian flow behavior.
This paper discusses the use of rotational rheometers to measure the rheology of drain oils. These instruments have been used for many years in other industries (food, paints and coatings) to measure particle filled, non- Newtonian fluids. The rotational method yields the general flow curve of viscosity versus shear rate as compared to the single point, low shear kinematic viscosity measurement. The rotational method includes the kinematic viscosity single point but also yields significantly more information on shear behavior. Both pumpability (low shear) and flowability(higher shear) can be ascertained from the rotational method.
Various geometry used in rotational methods will be discussed along with controlled stress versus controlled rate rheometers. The specific requirements of a procedure are outlined along with considerations for preshear conditioning, equilibration, temperature and time effects. Data analysis of the curves and simplification with an empirical model are also presented.
Results include data from a number of different engine drain oils. This will include Newtonian oils with high and low soot levels and non-Newtonian oils with high and low soot levels. The above mentioned methods and procedures will be used to analyze these systems and demonstrate the procedure and analysis.
CitationGeorge, H., Bardasz, E., and Soukup, B., "Understanding Soot Mediated Oil Thickening Through Designed Experimentation Part 3: An Improved Approach to Drain Oil Viscosity Measurements - Rotational Rheology," SAE Technical Paper 971692, 1997, https://doi.org/10.4271/971692.
SAE 1997 Transactions - Journal of Fuels and Lubricants
Number: V106-4; Published: 1998-09-15
Number: V106-4; Published: 1998-09-15
- Barnes Hutton Walters An Introduction to Rheology Elsevier 1989
- Briant J. Denis J. Parc G. Rheological Properties of Lubricants 1989
- Suzuki Yasuyoshi Mitsui Jun'ichi Shiomi Masaaki Fukuchi Hisashi Okamura Hiromasa “Experimental Study on Viscosity-Shear Characteristics of Lubricating Oils” SAE Paper 951029 1995
- Selby T. Miiller G. “Automotive Engine Oil and Very High Shear Rate Viscometry” Proceedings of 10th International Tribology Colloquium Esslingen, Germany
- The Relationship Between High-Temperature Oil Rheology and Engine Operations ASTM Data Series Publication
- Bardasz E. A. Cowling S. V. Ebeling V. L. George H. F. Graf M. M. Kornbrekke R. E. Ripple D. E. “Understanding Soot Mediated Oil Thickening Through Designed Experimentation - Part 1: Mack EM6-287, GM 6.2L” SAE Paper 95527 1995
- Bardasz E. A. Cowling S. V. Ebeling V. L. George H. F. Graf M. M. Kornbrekke R. E. Ripple D. E. “Understanding Soot Mediated Oil Thickening Through Designed Experimentation - Part 2: GM 6.5L” SAE Paper 961915 1996
- Bardasz E. A. Carrick V. A. George H. F. Graf M. M. Kornbrekke R. E. Pocinki S. B. “Understanding Soot Mediated Oil Thickening Through Designed Experimentation - Part 4: Mack T8” SAE Paper 1997
- Karis T. E. “An Overview of Rheology in the Computer Industry” J. Applied Polymer Science 59 9 1405 1416 2 28 96
- George H.F. Boothe D. P. “Rheology Control of Non-Aqueous Coatings” Industrial Paint and Powder March 1994
- Ryason P. R. Hansen T. P. “Voluminosity of Soot Aggregates - A Means of Characterizing Soot-Laden Oils” SAE Paper 912343 1991
- Herschel W.A. Bulkley R. Consistency as Applied to Rubber-Benzene Solutions” Proc. ASTM 26 621 633 1926
- McGeehan J. A. Rutherford J. A. Couch M. C. “Clean Diesel Exhaust But Sooty Engines: The Importance of the Crankcase Oil” SAE Paper 912342 1991
- George H. F. Hedrick D. P. “Comparative Rheology of Commercial Viscosity Modifier Concentrates” SAE Paper 932834 1993