A Brief Investigation into Ejection Times from a Conical Mass Flow Hopper - Coulomb and Conical Model Difference

摘要

A conical mass flow hopper system is modelled using stress field theory as found in [1]. The authors present the governing equations for the stress and velocity fields under the radial flow assumption for the Coulomb and conical yield functions. The ejection times for the two models are compared and are shown to be vastly different between the two models. The residence time distributions for the models are presented. We conclude that the choice of model has a large effect on the predicted mixing as a powder travels through the hopper system.