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Theoretical Advantages of Shear Thickening Behavior in Automatic Transmission Fluids
Technical Paper
2003-01-1986
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The rheological behavior of automatic transmission fluids (ATF) ranges from moderately shear-thinning to Newtonian. However, no commercially available ATFs are known to display shear-thickening behavior. A theoretical investigation was performed to determine if any advantages could be derived from the use of shear-thickening ATF in automatic transmission components and subsystems. A series of theoretical shear-thickening, shear-thinning, and Newtonian fluids were modeled by a power law function and compared to a reference shear-thinning ATF in simplified representations of transmission components and subsystem geometries. The results indicate that a shear-thickening ATF with zero shear viscosity, infinite shear viscosity, and power of 417 mPa-s, 6.23 mPa-s, and 1.03(dimensionless), respectively, displays optimized behavior with respect to the reference shear-thinning ATF.
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Citation
Sarkar, R. and Linden, J., "Theoretical Advantages of Shear Thickening Behavior in Automatic Transmission Fluids," SAE Technical Paper 2003-01-1986, 2003, https://doi.org/10.4271/2003-01-1986.Also In
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