The effect of particle shape on discharge and clogging

Abstract Granular flow is common across different fields from energy resource recovery and mineral processing to grain transport and traffic flow. Migrating particles may jam and form arches that span constrictions and hinder particle flow. Most studies have investigated the migration and clogging o...

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Autores principales:	Ahmed Hafez, Qi Liu, Thomas Finkbeiner, Raed A. Alouhali, Timothy E. Moellendick, J. Carlos Santamarina
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b98ddeb27ab5408b8c304b78991a2f68
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spelling	oai:doaj.org-article:b98ddeb27ab5408b8c304b78991a2f682021-12-02T12:14:50ZThe effect of particle shape on discharge and clogging10.1038/s41598-021-82744-w2045-2322https://doaj.org/article/b98ddeb27ab5408b8c304b78991a2f682021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-82744-whttps://doaj.org/toc/2045-2322Abstract Granular flow is common across different fields from energy resource recovery and mineral processing to grain transport and traffic flow. Migrating particles may jam and form arches that span constrictions and hinder particle flow. Most studies have investigated the migration and clogging of spherical particles, however, natural particles are rarely spherical, but exhibit eccentricity, angularity and roughness. New experiments explore the discharge of cubes, 2D crosses, 3D crosses and spheres under dry conditions and during particle-laden fluid flow. Variables include orifice-to-particle size ratio and solidity. Cubes and 3D crosses are the most prone to clogging because of their ability to interlock or the development of face-to-face contacts that can resist torque and enhance bridging. Spheres arriving to the orifice must be correctly positioned to create stable bridges, while flat 2D crosses orient their longest axes in the direction of flowlines across the orifice and favor flow. Intermittent clogging causes kinetic retardation in particle-laden flow even in the absence of inertial effects; the gradual increase in the local particle solidity above the constriction enhances particle interactions and the probability of clogging. The discharge volume before clogging is a Poisson process for small orifice-to-particle size ratio; however, the clogging probability becomes history-dependent for non-spherical particles at large orifice-to-particle size ratio and high solidities, i.e., when particle–particle interactions and interlocking gain significance.Ahmed HafezQi LiuThomas FinkbeinerRaed A. AlouhaliTimothy E. MoellendickJ. Carlos SantamarinaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ahmed Hafez Qi Liu Thomas Finkbeiner Raed A. Alouhali Timothy E. Moellendick J. Carlos Santamarina The effect of particle shape on discharge and clogging
description	Abstract Granular flow is common across different fields from energy resource recovery and mineral processing to grain transport and traffic flow. Migrating particles may jam and form arches that span constrictions and hinder particle flow. Most studies have investigated the migration and clogging of spherical particles, however, natural particles are rarely spherical, but exhibit eccentricity, angularity and roughness. New experiments explore the discharge of cubes, 2D crosses, 3D crosses and spheres under dry conditions and during particle-laden fluid flow. Variables include orifice-to-particle size ratio and solidity. Cubes and 3D crosses are the most prone to clogging because of their ability to interlock or the development of face-to-face contacts that can resist torque and enhance bridging. Spheres arriving to the orifice must be correctly positioned to create stable bridges, while flat 2D crosses orient their longest axes in the direction of flowlines across the orifice and favor flow. Intermittent clogging causes kinetic retardation in particle-laden flow even in the absence of inertial effects; the gradual increase in the local particle solidity above the constriction enhances particle interactions and the probability of clogging. The discharge volume before clogging is a Poisson process for small orifice-to-particle size ratio; however, the clogging probability becomes history-dependent for non-spherical particles at large orifice-to-particle size ratio and high solidities, i.e., when particle–particle interactions and interlocking gain significance.
format	article
author	Ahmed Hafez Qi Liu Thomas Finkbeiner Raed A. Alouhali Timothy E. Moellendick J. Carlos Santamarina
author_facet	Ahmed Hafez Qi Liu Thomas Finkbeiner Raed A. Alouhali Timothy E. Moellendick J. Carlos Santamarina
author_sort	Ahmed Hafez
title	The effect of particle shape on discharge and clogging
title_short	The effect of particle shape on discharge and clogging
title_full	The effect of particle shape on discharge and clogging
title_fullStr	The effect of particle shape on discharge and clogging
title_full_unstemmed	The effect of particle shape on discharge and clogging
title_sort	effect of particle shape on discharge and clogging
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b98ddeb27ab5408b8c304b78991a2f68
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The effect of particle shape on discharge and clogging

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