Papers Accepted
Abstract:
Jenike's radial solution, widely used in the design of
materials-handling equipment, is a similarity solution of
steady-state continuum equations for the flow under gravity
of granular material through an infinite, right-circular
cone. In this paper we study how the geometry of the hopper
influences this solution. Using perturbation theory, we
compute a first-order correction to the (steady-state)
velocity resulting from a small change in hopper geometry,
either distortion of the cross section or tilting away from
vertical. Unlike for the Jenike solution, all three
components of the correction velocity are nonzero: i.e.,
there is secondary circulation in the perturbed flow.