| Issue |
EPJ Web Conf.
Volume 340, 2025
Powders & Grains 2025 – 10th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 02021 | |
| Number of page(s) | 4 | |
| Section | Rheology and Constitutive Modelling | |
| DOI | https://doi.org/10.1051/epjconf/202534002021 | |
| Published online | 01 December 2025 | |
https://doi.org/10.1051/epjconf/202534002021
Continuum modeling of shear dilatancy-induced secondary flow in granular media
Indian Institute of Science, Bangalore, 560012, India
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Published online: 1 December 2025
Abstract
This study explores the transient evolution of dilation-driven secondary flows in a dense, slowly sheared granular medium using the non-local continuum model of Dsouza and Nott [1]. In earlier studies, DEM simulations have shown that shear-induced dilatancy, coupled with gravity, sustains a system-spanning secondary vortex in a plane Couette setup with a free surface. We impose a fixed top boundary and a prescribed mean volume fraction to simplify computations. The model captures the emergence of transient, dilation-driven secondary vortices, mirroring qualitative features of the simulations. The magnitude of the secondary velocity is smaller than that in DEM simulations, reflecting suppression of expansion by the fixed boundary. These findings validate the model’s robustness and establish a foundation for future studies incorporating free-surface conditions.
© The Authors, published by EDP Sciences, 2025
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