Effect of lognormal particle size distributions of non-spherical particles on hopper discharge characteristics

This study focusses on the hopper discharge characteristics of lognormal particle size distributions (PSDs) of non-spherical particles (namely, ellipsoids, cylinders and cuboids). Discrete element method is employed to understand the coupled effects of sphericity and lognormal PSD width. The results...

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Main Authors: Zhao, Ya, Chew, Jia Wei
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/155139
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1551392022-02-14T05:14:25Z Effect of lognormal particle size distributions of non-spherical particles on hopper discharge characteristics Zhao, Ya Chew, Jia Wei School of Chemical and Biomedical Engineering Singapore Membrane Technology Centre Nanyang Environment and Water Research Institute Engineering::Bioengineering Discrete Element Method Granular Flow This study focusses on the hopper discharge characteristics of lognormal particle size distributions (PSDs) of non-spherical particles (namely, ellipsoids, cylinders and cuboids). Discrete element method is employed to understand the coupled effects of sphericity and lognormal PSD width. The results reveal that: (i) the ellipsoids have the most similar discharge behaviors with the spheres, but the differences increase as the PSD width increases; (ii) the packing density in the hopper increases as PSD width increases and particle sphericity decreases; (iii) regardless of sphericity, the discharge rate decreases and the jamming probability increases as the PSD width increases; (iv) for the same PSD width, the jamming probability is the greatest for cuboids and least for the ellipsoids; and (v) the lower-sphericity cylinder and cuboid have some residual particles left in the hopper upon complete discharge, and the number of residues is greater and increases with PSD width for the latter. The results provide new insights regarding the behavior of wide PSDs of non-spherical particles in the hopper, highlighting the non-negligible impact of the coupled effect of PSD and particle non-sphericity. National Research Foundation (NRF) The authors would like to acknowledge the financial support provided by the National Research Foundation (NRF), Prime Minister’s Office, Singapore, under its Campus for Research Excellence and Technological Enterprise (CREATE) program, and also the 2nd Intra-CREATE Seed Collaboration Grant (NRF2017-ITS002-013). 2022-02-14T05:14:25Z 2022-02-14T05:14:25Z 2020 Journal Article Zhao, Y. & Chew, J. W. (2020). Effect of lognormal particle size distributions of non-spherical particles on hopper discharge characteristics. Chemical Engineering Research and Design, 163, 230-240. https://dx.doi.org/10.1016/j.cherd.2020.09.001 0263-8762 https://hdl.handle.net/10356/155139 10.1016/j.cherd.2020.09.001 2-s2.0-85091262877 163 230 240 en NRF2017-ITS002-013 Chemical Engineering Research and Design © 2020 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Bioengineering
Discrete Element Method
Granular Flow
spellingShingle Engineering::Bioengineering
Discrete Element Method
Granular Flow
Zhao, Ya
Chew, Jia Wei
Effect of lognormal particle size distributions of non-spherical particles on hopper discharge characteristics
description This study focusses on the hopper discharge characteristics of lognormal particle size distributions (PSDs) of non-spherical particles (namely, ellipsoids, cylinders and cuboids). Discrete element method is employed to understand the coupled effects of sphericity and lognormal PSD width. The results reveal that: (i) the ellipsoids have the most similar discharge behaviors with the spheres, but the differences increase as the PSD width increases; (ii) the packing density in the hopper increases as PSD width increases and particle sphericity decreases; (iii) regardless of sphericity, the discharge rate decreases and the jamming probability increases as the PSD width increases; (iv) for the same PSD width, the jamming probability is the greatest for cuboids and least for the ellipsoids; and (v) the lower-sphericity cylinder and cuboid have some residual particles left in the hopper upon complete discharge, and the number of residues is greater and increases with PSD width for the latter. The results provide new insights regarding the behavior of wide PSDs of non-spherical particles in the hopper, highlighting the non-negligible impact of the coupled effect of PSD and particle non-sphericity.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Zhao, Ya
Chew, Jia Wei
format Article
author Zhao, Ya
Chew, Jia Wei
author_sort Zhao, Ya
title Effect of lognormal particle size distributions of non-spherical particles on hopper discharge characteristics
title_short Effect of lognormal particle size distributions of non-spherical particles on hopper discharge characteristics
title_full Effect of lognormal particle size distributions of non-spherical particles on hopper discharge characteristics
title_fullStr Effect of lognormal particle size distributions of non-spherical particles on hopper discharge characteristics
title_full_unstemmed Effect of lognormal particle size distributions of non-spherical particles on hopper discharge characteristics
title_sort effect of lognormal particle size distributions of non-spherical particles on hopper discharge characteristics
publishDate 2022
url https://hdl.handle.net/10356/155139
_version_ 1725985536334626816