Granular column collapse
The role of particle size polydispersity on the velocity and runout
Oscar Polanía (Universidad de los Andes, Université de Montpellier)
Nicolás Estrada (Universidad de los Andes)
Mathieu Renouf (Université de Montpellier)
Emilien Azéma (Université de Montpellier, Institut Universitaire de France)
M.A. Cabrera (Geo-engineering)
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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.
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