| Title: |
Rheology of suspensions of cubic particles |
| Authors: |
d'Ambrosio, E; Gilbert, D; Blanc, F; Cohen, C; Lemaire, Elisabeth |
| Contributors: |
Université Côte d'Azur (UniCA); Institut de Physique - CNRS Physique (INP-CNRS) |
| Source: |
ISSN: 0148-6055. |
| Publisher Information: |
CCSD; American Institute of Physics |
| Publication Year: |
2025 |
| Collection: |
HAL Université Côte d'Azur |
| Subject Terms: |
[PHYS]Physics [physics] |
| Description: |
International audience ; The rheology of non-Brownian suspensions containing non-spherical particles, such as cubes, remains largely unexplored, despite their relevance in both industrial and natural contexts. While many studies have focused on suspensions of spherical particles, only a few have investigated the viscosity of suspensions with cubic-like particles, and none have quantified the particle normal stresses in such systems. In this work, cubic particles were fabricated using a soft lithography technique and suspended in a Newtonian fluid. Rheometric experiments were conducted to determine the Einstein and Batchelor coefficients in the dilute and semi-dilute regimes, revealing stronger hydrodynamic interactions compared to spheres. In the concentrated regime, viscosity measurements as a function of shear stress exhibit shear-thinning behavior, which can be effectively captured by introducing a shear-dependent jamming volume fraction. The viscosity is significantly higher -or equivalently, the jamming fraction markedly lower-than in spherical particle suspensions. The third normal stress component (in the vorticity direction) is measured through resuspension experiments. We show that, for a given shear stress, the sediment spreads significantly more in suspensions of cubes than in suspensions of spheres, indicating substantially higher particle normal stresses than in the spherical case. Finally, at a given solid fraction, the ratio of the third particle normal stress to the shear stress is found to be of the same order for suspensions of spherical and cubic particles. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1122/8.0001045 |
| Availability: |
https://hal.science/hal-05218255; https://hal.science/hal-05218255v1/document; https://hal.science/hal-05218255v1/file/article.pdf; https://doi.org/10.1122/8.0001045 |
| Rights: |
https://about.hal.science/hal-authorisation-v1/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.EB7144A2 |
| Database: |
BASE |