Storage Systems

A deep grain silo #14 of diameter D = 4 m has cross-sectional area A = 12.57 m^2 and perimeter U = 12.57 m (hydraulic radius R = A/U = 1.0 m). For grain bulk density rho = 800 kg/m^3 (gamma = 7.85 kN/m^3) and wall friction coefficient mu' = 0.4 with k = 0.5, the asymptotic maximum lateral pressure L_max = gamma * R / mu' in kPa is approx: