Abstract
Single-drop granulation is performed under a variety of conditions to characterize the behavior that results from a liquid droplet impacting a powder bed. Drop impact velocity, liquid binder properties, powder bed consolidation status, and primary particle size are all demonstrated to have significant effects on the resulting granule formation mechanism. The process is broken down into a drop impact/drop deformation stage, a drop rebound stage, and a drop imbibition stage. These stages are often in competition with each other to determine the overall drop penetration behavior. Twelve granule formation mechanisms are identified and characterized in this study, in addition to two established granule formation mechanisms that were not observed in this work.
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