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  • Journal of Fluid Mechanics, Volume 309
  • February 1996, pp. 211-223

Shear-induced dispersion in a dilute suspension of rough spheres

  • F. R. Da Cunha (a1) (a2) and E. J. Hinch (a1)
  • DOI:
  • Published online: 26 April 2006

In the absence of Brownian motion, inertia and inter-particle forces, two smooth spheres collide in a simple shear flow in a reversible way returning to their initial streamlines. Because the minimum separation during the collision can be less than 10−4 of the radius, quite a small surface roughness can have a significant irreversible effect on the collision. We calculate the change between the initial and final streamlines caused by roughness. Repeated random collisions in a dilute suspension lead to a diffusion of the particles across the streamlines. We calculate the shear-induced diffusivity for both self-diffusion and down-gradient diffusion.

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Journal of Fluid Mechanics
  • ISSN: 0022-1120
  • EISSN: 1469-7645
  • URL: /core/journals/journal-of-fluid-mechanics
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