An approximate theory for pressures and arching in hoppers

摘要: Abstract A simple theory is developed which yields the approximate stresses within a granular material or powder flowing in hopper systems and gives critical factors ensure continued gravity flow. The stress fields during mass flow have been derived by consideration of forces acting on elemental slices are simultaneously yielding themselves along walls. Like Jenike, who has given an exact solution for outlets only, when considering arching it assumed that strength function only local prevailed preceeding Allowance now made, however, effect limited vertical shear can be near steep smooth wall potential arch span. Consequently, ideal hopper, designed from strength—stress characteristics likely to walls get steeper towards outlet.