Volume 66, Number 1, April 2004
|Page(s)||139 - 145|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 March 2004|
Flow and segregation in sheared granular slurries
CRPP - Avenue A. Schweitzer, 33600 Pessac, France
2 LPMCN, Université Claude Bernard Lyon I - 69622 Villeurbanne, France
3 CNAV - 15 avenue L. Jouhanneau, BP 7266, 37072 Tours, France
Accepted: 8 January 2004
We study the behaviour of a granular slurry, i.e., a very concentrated suspension of heavy (denser than the fluid) and polydisperse particles sheared between two parallel-plane circular disks. For small gaps, the slurry behaves as a 2d system with a characteristic radial size segregation of particles. For large gaps, the slurry responds as a 3d system, with considerable vertical segregation and a concomitant 2-phase (fluid, solid) flow structure. The thickness ζ of the fluid phase is the 2d-3d gap crossover. Surprisingly, ζ is found to be nearly unaffected by very large changes in the particle size distribution.
PACS: 83.80.Hj – Suspensions, dispersions, pastes, slurries, colloids / 64.75.+g – Solubility, segregation, and mixing; phase separation / 83.85.Ei – Optical methods; rheo-optics
© EDP Sciences, 2004
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