A Bingham plastic discharges from the bottom of a storage tank through a horizontal 100mmID pipe of equivalent length 19.6m as shown below. What head of fluid h will give an outflow velocity of 1.0ms1 ? The density of the fluid is 2000kgm3; the yield stress is 20Pa; and the plastic viscosity is 0.02Pas. Flow of a Bingham plastic from a storage tank