Alternating shear rotation for dense suspensions : Influence of the strain amplitude
Acharya, Pappu LU ; Mircea, Alex Ovidiu LU and Trulsson, Martin LU
(2025)
10th International Conference on Micromechanics on Granular Media, Powders and Grains 2025
340.
- 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... (More)
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.
(Less)
- author
- Acharya, Pappu
LU
; Mircea, Alex Ovidiu
LU
and Trulsson, Martin
LU
- organization
- publishing date
- 2025-12
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- EPJ Web of Conferences
- volume
- 340
- article number
- 04005
- conference name
- 10th International Conference on Micromechanics on Granular Media, Powders and Grains 2025
- conference location
- Candolim, Goa, India
- conference dates
- 2025-12-08 - 2025-12-12
- external identifiers
-
- scopus:105024447685
- DOI
- 10.1051/epjconf/202534004005
- language
- English
- LU publication?
- yes
- id
- d93a6489-f473-4da6-9bbb-a5294035b734
- date added to LUP
- 2026-02-13 10:54:51
- date last changed
- 2026-02-13 10:55:43
@inproceedings{d93a6489-f473-4da6-9bbb-a5294035b734,
abstract = {{<p>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.</p>}},
author = {{Acharya, Pappu and Mircea, Alex Ovidiu and Trulsson, Martin}},
booktitle = {{EPJ Web of Conferences}},
language = {{eng}},
title = {{Alternating shear rotation for dense suspensions : Influence of the strain amplitude}},
url = {{http://dx.doi.org/10.1051/epjconf/202534004005}},
doi = {{10.1051/epjconf/202534004005}},
volume = {{340}},
year = {{2025}},
}