ABSTRACT
Prior to discussing any results on axial segregation, let us mention that radial segregation is observed throughout the length of the drum after only a few rotations. This type of segregation is of great importance for axial segregation since the latter can be seen as a fluctuation of the inner core, made of small grains in most cases. Some previous experimental work (Hill et al. 1997; Newey et al. 2004) showed that the inner core is still present in the final steady state as some others (Nakagawa et al. 1997; Chicharro et al.) showed that the core disappears meaning that the bands are pure. Both situations were observed in our simulation, depending on the size of the drum, the filling fraction and the material properties.
