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The shear-thinning behaviour of colloidal dispersions

Author

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  • van der Werff, J.C.
  • de Kruif, C.G.
  • Dhont, J.K.G.

Abstract

We measured the viscosity of three hard-sphere dispersions of different sized particles as a function of the Péclet number. The particle radii vary from 28 to 78 nm. The dispersions consist of sterically stabilized sitica particles dispersed in cyclohexane. It is found that in between two Newtonian plateaus at very small and large shear rates, respectively, there is a large region of Péclet numbers where the viscosity decreases proportional to the square root of the Péclet number. The constant of proportionality increases with volume fraction but is independent of particle size.

Suggested Citation

  • van der Werff, J.C. & de Kruif, C.G. & Dhont, J.K.G., 1989. "The shear-thinning behaviour of colloidal dispersions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 160(2), pages 205-212.
    • Handle: RePEc:eee:phsmap:v:160:y:1989:i:2:p:205-212
    DOI: 10.1016/0378-4371(89)90417-2
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