Table 1 Material characterization techniques used and their relation to DEM input parameters.

From: Investigating screw-agitator speed ratio impact on feeding performance in pharmaceutical manufacturing using discrete element method

Characterization method

Bulk property descriptor

Related DEM input parameters

Tapping device

Bulk and tapped density

 

Hausner ratio

Granudrum*

Dynamic angle of repose

P–P** static friction

cohesive index

P–P** rolling friction

FT4 powder rheometer

Flow rate index

Bulk density

Flow energy (force and torque)

P–P/P–W** static friction

JKR surface energy

Coefficient of restitution

  1. *Granudrum: used only for the lactose-base free-flowing powder,**P–P: interaction between particles, P–W: interaction between particle and geometry wall.
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