The flux of granular material at inclined chutes is not only dependend
on the physical properties of the material and the inclination angle
but call be widely effected by the input of kinetic energy at the boun
daries. With a frictional-collisional model [1] the flow behaviour of
granular material at inclined chutes is calculated. We investigate the
influence of supply of momentum and kinetic energy due to additional
particles falling on the sliding layer.