Granular column collapse

The role of particle size polydispersity on the velocity and runout

Journal article (2023)

Authors

Oscar Polanía Université de Montpellier, Universidad de los Andes
Nicolás Estrada Universidad de los Andes
Mathieu Renouf Université de Montpellier
Emilien Azéma Université de Montpellier, Institut Universitaire de France
Copyright: © 2023 Oscar Polanía, Nicolás Estrada, Mathieu Renouf, Emilien Azéma, M.A. Cabrera
DOI: https://doi.org/10.1051/e3sconf/202341502017
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Published Date

2023

Language

English

Abstract

Geophysical mass flows involve particles of different sizes, a property termed polydispersity. The granular column collapse is a simplified experiment for studying transitional granular flows. Our research focuses on the role that polydispersity has on the velocity and runout distance of dry and immersed granular columns, undergoing a numerical and experimental study. Our results highlight that polydispersity does not have a strong effect on the collapse of dry columns. On the contrary, the collapse sequence of immerse granular columns strongly depend on the polydispersity level.