Clogging in two-dimensions: Effect of particle shape

We study the discharge of a two-dimensional silo through small openings via discrete element simulations. We consider the effect of the shape of the grains on the clogging of the flow, focusing on regular polygons and disks. We show that the clogging probability presents a non-linear response as a function of the number of vertexes of the polygons. Also, the clogging probability is strongly dependent on the protocol used to trigger the flow after each clog. We found that the size and shape of the blocking arches display a much larger variability for some polygons, particularly for squares, than for disks.Fil: Goldberg, Ezequiel. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires; ArgentinaFil: Carlevaro, Carlos Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física de Líquidos y Sistemas Biológicos. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física de Líquidos y Sistemas Biológicos; Argentina. Universidad Tecnológica Nacional. Facultad Regional Buenos Aires; ArgentinaFil: Pugnaloni, Luis Ariel. Universidad Tecnológica Nacional. Facultad Regional La Plata. Departamento de Ingeniería Mecánica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentin