Abstract
The lateral pressures exerted by a granular material on the cylindrical walls of a bin are expressed by Janssen''s formula. The pressures during filling vary greatly with filling rates because of impact loads. On the other hand, the pressures during -mass flow are larger than those during filling and are independent of Sow rates. The flow properties of granular materials are determined in a mass flow state using a small-scale model bin. These values are applicable to estimate the lateral pressures in a full-sized silo.
