Rheological Signature of Frictional Interactions in Shear Thickening Suspensions.

  title={Rheological Signature of Frictional Interactions in Shear Thickening Suspensions.},
  author={John R. Royer and Daniel L. Blair and Steven D. Hudson},
  journal={Physical review letters},
  volume={116 18},
Colloidal shear thickening presents a significant challenge because the macroscopic rheology becomes increasingly controlled by the microscopic details of short ranged particle interactions in the shear thickening regime. Our measurements here of the first normal stress difference over a wide range of particle volume fractions elucidate the relative contributions from hydrodynamic lubrication and frictional contact forces, which have been debated. At moderate volume fractions we find N_{1}<0… 

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