Role of fluctuation-induced interactions in the axial segregation of granular materials |
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Authors: | Zuriguel I Boudet J F Amarouchene Y Kellay H |
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Affiliation: | Centre de Physique Moleculaire Optique et Hertzienne, UMR 5978, U. Bordeaux1 351 cours de la Liberation, 33405 Talence cedex France. |
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Abstract: | The movement of a few large diameter spheres immersed in a granular medium composed of smaller beads in a rotating cylinder is studied. We evidence attractions and repulsions between the large spheres depending on the rotation frequency. The large spheres also show relative position fluctuations which are Gaussian. A complete study of this problem sheds new light on the problem of size segregation in granular materials and points to the importance of fluctuation-induced interactions. |
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