| Issue |
EPJ Web Conf.
Volume 340, 2025
Powders & Grains 2025 – 10th International Conference on Micromechanics on Granular Media
|
|
|---|---|---|
| Article Number | 05003 | |
| Number of page(s) | 4 | |
| Section | Polydispersity, Segregation, and Pattern Formation | |
| DOI | https://doi.org/10.1051/epjconf/202534005003 | |
| Published online | 01 December 2025 | |
https://doi.org/10.1051/epjconf/202534005003
Density-driven submerged granular flows in rotating drums
School of Civil Engineering, The University of Sydney, Sydney, Australia
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Published online: 1 December 2025
Abstract
Granular flows and segregation phenomena play critical roles in diverse natural and industrial processes. We investigated the dynamics of mono-dispersed and binary granular mixtures in submerged rotating drums using combined experimental and numerical methods. Mono-dispersed granular flows demonstrate clear transitions between rolling and cascading regimes, strongly influenced by particle density, fluid properties, and rotation speeds; these transitions are effectively captured by a modified Froude number (Fr*) incorporating particle-fluid density differences. Extending this analysis to binary mixtures reveals a density-driven segregation mechanism, with the mixing index exhibiting an exponential relationship with the effective density ratio (D). Our findings offer enhanced fundamental understanding of submerged granular flows and segregation dynamics, providing valuable insights for both scientific exploration and engineering practices.
© The Authors, published by EDP Sciences, 2025
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