Efecto de orden en descarga de silos. Publicación en Frontiers Soft Matter.
Con los colegas y amigos Luis Pugnaloni (UNLPam) y Ryan Kozlowski (College of Holly Cross),
estudiamos la descarga de silos en sistemas granulares binarios en dos dimensiones,
abordando la influencia del orden de corto alcance que se generan en sistemas monodispersos
sobre el caudal de descarga. (Carlevaro et al., 2024)
Existe un debate acerca de la relevancia que tiene el ordenamiento local visible de sistemas
monodispersos más allá de su efecto en la fracción de empaquetamiento. En este trabajo evaluamos
si la presencia de dominios ordenados durante el flujo afecta a la descarga y conduce a potenciales obstrucciones. Destacamos la importancia de comprender cómo la introducción de polidispersión en
el tamaño de los granos puede alterar el ordenamiento inicial, y en consecuencia, influir en la
tasa de descarga.
Carlevaro, C. M., Kozlowski, R., & Pugnaloni, L. A. (2024). Flow rate in 2D silo discharge of binary granular mixtures: the role of ordering in monosized systems. Frontiers in Soft Matter, 4. https://www.frontiersin.org/articles/10.3389/frsfm.2024.1340744
@article{carlevaro2024,
author = {Carlevaro, C. Manuel and Kozlowski, Ryan and Pugnaloni, Luis A.},
title = {Flow rate in 2D silo discharge of binary granular mixtures: the role of ordering in monosized systems},
journal = {Frontiers in Soft Matter},
volume = {4},
year = {2024},
url = {https://www.frontiersin.org/articles/10.3389/frsfm.2024.1340744},
doi = {10.3389/frsfm.2024.1340744},
issn = {2813-0499}
}
A long-standing debate regarding the dynamics of silo discharge revolves around the use of mono-dispersed circular or spherical grains in simplified two-dimensional models. It is well-known that granular systems composed of particles of the same size can generate crystal or quasi-crystal domains with specific structural and dynamic behaviors. Can this ordering affect the flow rate to an extent that monosized systems cannot be good models for realistic materials? In this work, we present simulations of the discharge of two-dimensional silos filled with binary mixtures of circular grains that conserve the same mean particle size. We address the question of how ordering affects the mass flow rate, in particular considering the limit of mono-sized systems. We find that the typical hexagonal order observed does not affect the flow rate significantly. However, the flow rate does exhibit a weak, nonmonotonic dependence on packing bidispersity that correlates with changes in the outpouring speed of grains in the vicinity of the orifice.