Stress and strain rate analysis of the FT4 Powder Rheometer
1 Department of Chemical and Process Engineering, The University of Surrey, Guildford, UK
2 School of Chemical and Process Engineering, The University of Leeds, Leeds, UK
* Corresponding author: firstname.lastname@example.org
Published online: 30 June 2017
The Freeman FT4 Powder Rheometer has been reported to describe well the powder flow behaviour in instances where other techniques fail. We use DEM to simulate the FT4 operation for slightly cohesive large glass beads at a range of strain rates. The curved impeller is shown to be beneficial in comparison to a flat blade as the variation of shear stress across the blade is reduced. The shear stress in front of the blade correlates well with flow energy (which the device measures) for a range of tip speeds and is shown to increase approximately linearly with tip speed when operating beyond the quasi-static regime.
© 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.