Phys. Rev. Lett. 91, 244301 (2003) [4 pages]Dynamics of Axial Segregation and Coarsening of Dry Granular Materials and Slurries in Circular and Square TubesReceived 14 May 2003; published 10 December 2003 We study segregation and coarsening dynamics of dry granular materials and slurries in tubes with circular and square cross sections. Space-time plots show key differences between the four cases, including band splitting and wave formation, depending upon the rotational speed. However, the fraction of the surface occupied by bands of small-rich particles is nearly constant in all experiments, leading to quasi-1D behavior, and the rate of coarsening, when it occurs, is logarithmic in all cases. Coarsening rates are very similar except in the case with the longest development time. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.244301
DOI:
10.1103/PhysRevLett.91.244301
PACS:
45.70.Mg, 05.65.+b, 45.70.Qj
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