J. Phys. I France
Volume 5, Numéro 12, December 1995
Page(s) 1551 - 1561
DOI: 10.1051/jp1:1995216
J. Phys. I France 5 (1995) 1551-1561

Studies of Diffusional Mixing in Rotating Drums via Computer Simulations

G.A. Kohring

Central Institute for Applied Mathematics, Research Center Jülich (KFA), D-52425 Jülich, Germany

(Received 24 August 1995, accepted in final form 29 August 1995)

Particle diffusion in rotating drums is studied via computer simulations using a full 3-D model which does not involve any arbitrary input parameters. The diffusion coefficient for single-component systems agrees qualitatively with previous experimental results. On the other hand, the diffusion coefficient for two-component systems is shown to be a highly nonlinear function of the rotation velocity. It is suggested that this result from a competition between the diffusive motion parallel to, and flowing motion perpendicular to the axis of rotation.

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