Figure 2
From: The effect of particle shape on discharge and clogging

Hoppers. (a) Dry granular flow tests. (b) Particle-laden fluid flow tests; the dual chamber configuration allows for controlled discharge rate.
From: The effect of particle shape on discharge and clogging
Hoppers. (a) Dry granular flow tests. (b) Particle-laden fluid flow tests; the dual chamber configuration allows for controlled discharge rate.