Theoretical Advantages of Shear Thickening Behavior in Automatic Transmission Fluids
2003-01-1986
05/19/2003
- Event
- Content
- 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.
- Pages
- 13
- 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.