| Issue |
EPJ Web Conf.
Volume 340, 2025
Powders & Grains 2025 – 10th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 02003 | |
| Number of page(s) | 3 | |
| Section | Rheology and Constitutive Modelling | |
| DOI | https://doi.org/10.1051/epjconf/202534002003 | |
| Published online | 01 December 2025 | |
https://doi.org/10.1051/epjconf/202534002003
Drag and lift forces when moving in a cohesive granular medium
1 Aix Marseille Univ., CNRS, IUSTI, Marseille, France
2 Université de Mons, InFluX, Mons, Belgique
* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Published online: 1 December 2025
Abstract
When a cylinder moves horizontally in a dry granular medium, it experiences both a drag force and a significant lift force, despite the symmetry of the geometry. The lift force arises due to the unique frictional nature of granular material rheology. The drag force is proportional to the pressure exerted by the column of grains above the object, while the lift force is proportional to the pressure gradient controled by gravity. This study investigates how these forces are affected by the introduction of adhesion between grains and whether measurements of drag and lift can serve as reliable proxies for determining the cohesion of the medium. Experiments were conducted using two types of cohesive granular media: wet grains and grains coated with a sticky polymer. The results indicate that cohesion has a minimal impact on drag, whereas it significantly reduces the lift force.
© The Authors, published by EDP Sciences, 2025
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