Coarsening in axial segregation, an entropic approach

Binary mixtures in rotating drums can segregate into a stripe pattern where the individual stripes merge on long timescales [1]. Here we present an X-ray tomography study which indicates that the driving mechanism of this coarsening process might be the increase of configurational entropy [2]. \newline [1] Finger {\it et al.} PRE {\bf 74} 031312 (2006) \newline [2] Edwards \& Oakeshott, Physica A {\bf 157} 1080 (1989)