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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    Title :

    Theoretical Advantages of Shear Thickening Behavior in Automatic Transmission Fluids


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    2003 JSAE/SAE International Spring Fuels and Lubricants Meeting ; 2003



    Publication date :

    2003-05-19




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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