DEM study on the discharge characteristics of lognormal particle size distributions from a conical hopper
This study employs the discrete element method (DEM) to investigate the impact of the widths of lognormal particle size distributions (PSDs) with the same mean particle diameter on hopper discharge behaviors, namely, discharge rate, particle velocities, and size‐segregation. Results reveal that (i)...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/143701 |
| _version_ | 1811685829557354496 |
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| author | Zhao, Ya Yang, Shiliang Zhang, Liangqi Chew, Jia Wei |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Zhao, Ya Yang, Shiliang Zhang, Liangqi Chew, Jia Wei |
| author_sort | Zhao, Ya |
| collection | NTU |
| description | This study employs the discrete element method (DEM) to investigate the impact of the widths of lognormal particle size distributions (PSDs) with the same mean particle diameter on hopper discharge behaviors, namely, discharge rate, particle velocities, and size‐segregation. Results reveal that (i) the hopper discharge rate decreases as PSD width increases; (ii) the mean discharge rates are constant with time, but the fluctuations increase as the PSD width increases; (iii) the overall size‐segregation increases with PSD width; (iv) the overall mean particle diameters of the narrower PSDs do not exceed the initial mean of 5 mm, whereas that of wider ones do; (v) the relationship between PSD width and particle velocities is non‐monotonic with no consistent trends; and (vi) no direct correlation exists between particle velocity and size‐segregation. The results here provide valuable insights on the behavior of the prevalent polydisperse mixtures in hoppers. |
| first_indexed | 2024-10-01T04:50:45Z |
| format | Journal Article |
| id | ntu-10356/143701 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:50:45Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1437012020-09-17T05:56:48Z DEM study on the discharge characteristics of lognormal particle size distributions from a conical hopper Zhao, Ya Yang, Shiliang Zhang, Liangqi Chew, Jia Wei School of Chemical and Biomedical Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Engineering::Chemical engineering::Biochemical engineering Discrete Element Method (DEM) Hopper Discharge This study employs the discrete element method (DEM) to investigate the impact of the widths of lognormal particle size distributions (PSDs) with the same mean particle diameter on hopper discharge behaviors, namely, discharge rate, particle velocities, and size‐segregation. Results reveal that (i) the hopper discharge rate decreases as PSD width increases; (ii) the mean discharge rates are constant with time, but the fluctuations increase as the PSD width increases; (iii) the overall size‐segregation increases with PSD width; (iv) the overall mean particle diameters of the narrower PSDs do not exceed the initial mean of 5 mm, whereas that of wider ones do; (v) the relationship between PSD width and particle velocities is non‐monotonic with no consistent trends; and (vi) no direct correlation exists between particle velocity and size‐segregation. The results here provide valuable insights on the behavior of the prevalent polydisperse mixtures in hoppers. 2020-09-17T05:56:48Z 2020-09-17T05:56:48Z 2018 Journal Article Zhao, Y., Yang, S., Zhang, L., & Chew J. W. (2018). DEM study on the discharge characteristics of lognormal particle size distributions from a conical hopper. AIChE Journal, 64(4), 1174-1190. doi:10.1002/aic.16026 1547-5905 https://hdl.handle.net/10356/143701 10.1002/aic.16026 4 64 1174 1190 en AIChE Journal © 2017 American Institute of Chemical Engineers. All rights reserved. |
| spellingShingle | Engineering::Chemical engineering::Biochemical engineering Discrete Element Method (DEM) Hopper Discharge Zhao, Ya Yang, Shiliang Zhang, Liangqi Chew, Jia Wei DEM study on the discharge characteristics of lognormal particle size distributions from a conical hopper |
| title | DEM study on the discharge characteristics of lognormal particle size distributions from a conical hopper |
| title_full | DEM study on the discharge characteristics of lognormal particle size distributions from a conical hopper |
| title_fullStr | DEM study on the discharge characteristics of lognormal particle size distributions from a conical hopper |
| title_full_unstemmed | DEM study on the discharge characteristics of lognormal particle size distributions from a conical hopper |
| title_short | DEM study on the discharge characteristics of lognormal particle size distributions from a conical hopper |
| title_sort | dem study on the discharge characteristics of lognormal particle size distributions from a conical hopper |
| topic | Engineering::Chemical engineering::Biochemical engineering Discrete Element Method (DEM) Hopper Discharge |
| url | https://hdl.handle.net/10356/143701 |
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