We experimentally investigated 3D biparticulate systems that segregate solely due to density differences in the 3D horizontal rotating drum geometry and compare these to systems which segregate due to size differences. Radial segregation was observed in all systems studied after a few drum rotations. Size induced axial segregation (banding) was observed, as expected. However, contrary to what has sometimes been reported, we found that density differences alone did not induce axial segregation for density ratios up to 4.9.
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Sanfratello, L., Fukushima, E. Experimental studies of density segregation in the 3D rotating cylinder and the absence of banding. Granular Matter 11, 73–78 (2009). https://doi.org/10.1007/s10035-008-0121-3
- Granular segregation
- Granular flow
- Axial segregation
- Density segregation