Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
239419 | Powder Technology | 2006 | 9 Pages |
Abstract
The flow dynamics of cohesive powders is investigated in rotating cylinders with an L : R ratio of 3 : 1 using experiments and DEM simulations. Flow onset and steady-state behavior are compared for free-flowing (cohesionless) dry glass beads, wet glass beads, and “dry” cohesive powders (lactose, microcrystalline cellulose). The avalanching dynamics of powders is substantially different from those observed for free-flowing or wet-cohesive glass beads. Dry cohesive powders exhibit history-dependent flow dynamics, significant dilation, aperiodic avalanche frequencies, and variable avalanche size. These behaviors also provide a route for effective characterization of cohesive forces under dilated conditions characteristic of unconfined flows.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Albert W. Alexander, Bodhisattwa Chaudhuri, AbdulMobeen Faqih, Fernando J. Muzzio, Clive Davies, M. Silvina Tomassone,