Abstract: A model of planar disc pile is applied to complicated granular matters.We analyze force transfer in the disc pile.Numerical simulation shows that the pressure on the cylinder bottom saturates with increasing height of granules.The rule of the planar disc pile is extended to three-dimensional granules and the relation between the height Z of granules and the average pressure p on cylinder bottom is obtained.

Key words: granular matter, silo effect, Janssen's model, numerical simulation