Role of Fluctuation-Induced Interactions in the Axial Segregation of Granular Materials

I. Zuriguel, J. F. Boudet, Y. Amarouchene, H. Kellay
2005 Physical Review Letters  
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.
doi:10.1103/physrevlett.95.258002 pmid:16384511 fatcat:zysythxnkzbnvjyaag4tnpx3n4