Granular column collapse: The role of particle size polydispersity on the velocity and runoutOscar Polanía, Nicolás Estrada, Mathieu Renouf, Emilien Azéma and Miguel CabreraE3S Web of Conf., 415 (2023) 02017DOI: https://doi.org/10.1051/e3sconf/202341502017