Abstract
This paper presents an experimental approach on a segregation phenomena of two sizes mixed granular with rough surface occurred in rolling cylinder experimental device. And this paper presents DEM simulations of those results in order to analyze segregation mechanism. Two sizes gravels and two sizes glass beads are used, and two of them are combined as a grain sample. Several roughness conditions at bottom surface of the rolling cylinder as well as no-roughness are given as an experimental parameter. For spherical surface granular, the roughness of bottom surface describes the occurrence of segregation. For rough surface granular, an adequate roughness of the bottom is necessary to the segregation. DEM simulates the segregation occurrence or no-occurrence as same as experimental results, and gives a fundamental information on the segregation occurrence mechanism.
