Radial band formation in binary mixtures of flowing granular media in a tilted tank

The formation of radial band of glass beads in a variable-sized grain mixture in a tilted rotating tank is examined experimentally for angles between 15$^{\circ}$ and 65$^{\circ}$ from the horizon and for rotation speeds $\le 50$ RPM. The mixture is composed of glass beads of two sizes; which have diameters between $100-600 \mu$m. Images are recorded of band formation for differing concentrations. We examine the width of the band and the distance from the bottom surface of the tank as a function of the concentration, tilt angle and speed.