Europhys. Lett, 48 (1), pp. 60-65 (1999)
Radial segregation through axial migration
C. M. Dury and G. H. Ristow
Fachbereich Physik, Philipps-Universität - Renthof 6, D-35032 Marburg, Germany.
(received 17 March 1999; accepted in final form 26 July 1999)
PACS. 64.75 - Solubility, segregation, and mixing; phase separation.
PACS. 81.05Rm - Porous materials; granular materials.
PACS. 45.05 - General theory of classical mechanics of discrete systems.
We investigate the interplay of radial size and density segregation in a three-dimensional cylinder numerically. By fixing the size ratio of a binary particle mixture and varying the density of the smaller particle, we find a very surprising segregation dynamics in the case of a counter-balance of size segregation by density segregation. It can be best described by a "segregation wave'' propagating through the system which has dissolved completely by the time it has reached the cylinder boundary.
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