Röck, Michael; Morgeneyer, Martin; Schwedes, Jörg; Kadau, Dirk; Brendel, Lothar; Wolf, Dietrich:

Steady state flow of cohesive and non-cohesive powders. Investigations in experiment and simulation

In: Granular matter, Jg. 10 (2008) ; Nr. 4, S. 285-293
ISSN: 1434-7636, 1434-5021
Zeitschriftenaufsatz / Fach: Physik
Abstract:
Steady state flow of powders is a crucial concept
to investigate the powders’ strength and flow properties. This
state is defined as a continuous deformation of the material
without volume change while the stresses at the specimen’s
boundaries remain constant. Recent investigations
have shown that this state, especially for cohesive powders, is
not always as constant as it should be by definition. This paper
presents experimental and numerical work, both for cohesive
and non-cohesive powders. The experimental part focuses on
the use of different control strategies, leading to steady state
flow of different quality. Differences between steady state
flow for cohesive and non-cohesive powders are shown.