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

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 t...

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Bibliographic Details
Published in:Granular matter 2008-06, Vol.10 (4), p.285-293
Main Authors: Röck, Michael, Morgeneyer, Martin, Schwedes, Jörg, Kadau, Dirk, Brendel, Lothar, Wolf, Dietrich E.
Format: Article
Language:English
Subjects:
Complex Fluids and Microfluidics
Engineering Fluid Dynamics
Engineering Thermodynamics
Foundations
Geoengineering
Heat and Mass Transfer
Hydraulics
Industrial Chemistry/Chemical Engineering
Materials Science
Numerical analysis
Physics
Physics and Astronomy
Shear tests
Soft and Granular Matter
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Summary: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.
ISSN:1434-5021
1434-7636
DOI:10.1007/s10035-008-0088-0