Stavrou, AG, Hare, C, Hassanpour, A orcid.org/0000-0002-7756-1506 et al. (1 more author) (2017) Flowability assessment of weakly consolidated powders. In: Radjai, F, Nezamabadi, S, Luding, S and Delenne, JY, (eds.) EPJ Web of Conferences. Powders and Grains 2017 – 8th International Conference on Micromechanics on Granular Media, 03-07 Jul 2017, Montpellier, France. EDP Sciences
Abstract
The inability of cohesive powders to flow consistently and reliably is a major cause of process downtime and reduced efficiency across a wide range of powder processing industries. Most methods to assess powder flowability fail at low consolidation pressures (<1 kPa). In this paper, the ball indentation technique is used to assess the flow behaviour of two powders at low stresses by determining the bed hardness. In parallel, the powders are subjected to shear testing in a range of high stresses, with the derived unconfined yield strength used, along with the indentation hardness to define the constraint factor (C). By using the latter, which is considered independent of the preconsolidation stress applied, the unconfined yield strength of the powders at low stresses are inferred from the penetration hardness measurements.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | © The Authors, published by EDP Sciences, 2017. This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Funding Information: | Funder Grant number International Fine Particle Research Ins 109a |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 Nov 2017 16:06 |
Last Modified: | 07 Nov 2017 16:06 |
Status: | Published |
Publisher: | EDP Sciences |
Identification Number: | 10.1051/epjconf/201714003085 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:123584 |