Segregation of granular mixtures in quasi 2D piles

BENITO, J. G.; RODRIGUEZ, D.; A. M. VIDALES; I. IPPOLITO; R.O. UÑAC; HULIN, J-P.

París

Jornada; Jornadas Franco-Argentinas de la Cooperación Científica para la innovación; 2014

We study the problem of flow segregation in quasi bidimensional piles built up by pouring a mix of grains of two different sizes from a constant height. To simulate the pile formation, we employ a pseudo-dynamics method. The concentration of small and big grains is varied. We also try with different size ratios between the grains. The segregation patterns arising after the pile is finished are studied by analyzing the spatial distribution of the grains. Two different segregation indices are defined and evaluated over the piles. The conditions under which the different segregation patterns show up are discussed. A comparison of all the results obtained with our own experimental results, is performed. The advantages and limitations of the simulation model are discussed.