| Issue |
EPJ Web Conf.
Volume 340, 2025
Powders & Grains 2025 – 10th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 04005 | |
| Number of page(s) | 4 | |
| Section | Jamming, Rigidity and Shear-Thickening Transitions | |
| DOI | https://doi.org/10.1051/epjconf/202534004005 | |
| Published online | 01 December 2025 | |
https://doi.org/10.1051/epjconf/202534004005
Alternating shear rotation for dense suspensions: Influence of the strain amplitude
1 Université Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
2 Computational Chemistry, Lund University, Lund SE-221 00, Sweden
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Published online: 1 December 2025
Abstract
Alternating shear rotations, also known as tacking, can effectively alter viscosity, the jamming point, and dissipation per strain for dense suspensions. For a given packing fraction, viscosity decreases with increasing cruising (tacking) angle, while dissipation shows a complex dependence on both packing fraction and cruising angle. Generally, the cruising angle required to reduce overall dissipation per propagating strain increases with increasing packing fraction. In this work, we extend our previous studies on the alternating shear rotation protocol and investigate the influence of strain amplitude, i.e., the strain between two concussive rotations. We show that viscosity and dissipation per strain remain roughly constant up to a strain amplitude of 20%, after which the viscosity approaches its steady-state value, and the dissipation per strain becomes unfavorable. We also report on the typical stress curves after a rotation and their individual contributions, contact and hydrodynamics.
© The Authors, published by EDP Sciences, 2025
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