The Use of Standpipes for Increasing Limiting Gravitational Flowrate from Mass Flow Bins

This paper provides an experimental and theoretical examination of the use of standpipes to increase the limiting flowrate by gravity from mass flow bins. The results indicate that the effect of a standpipe attached under the hopper outlet is greater as the particle size becomes smaller and the length of the standpipe becomes longer, provided the standpipe remains full of solids.