A numerical study of the segregation phenomenon of lognormal particle size distributions in the rotating drum
Granular materials are mostly polydisperse, which gives rise to phenomena such as segregation that has no monodisperse counterpart. The discrete element method is applied to simulate lognormal particle size distributions (PSDs) with the same arithmetic mean particle diameter but different PSD widths...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/106312 http://hdl.handle.net/10220/48918 |
| _version_ | 1811684883878117376 |
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| author | Yang, Shiliang Sun, Yuhao Zhao, Ya Chew, Jia Wei |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Yang, Shiliang Sun, Yuhao Zhao, Ya Chew, Jia Wei |
| author_sort | Yang, Shiliang |
| collection | NTU |
| description | Granular materials are mostly polydisperse, which gives rise to phenomena such as segregation that has no monodisperse counterpart. The discrete element method is applied to simulate lognormal particle size distributions (PSDs) with the same arithmetic mean particle diameter but different PSD widths in a three-dimensional rotating drum operating in the rolling regime. Despite having the same mean particle diameter, as the PSD width of the lognormal PSDs increases, (i) the steady-state mixing index, the total kinetic energy, the ratio of the active region depth to the total bed depth, the mass fraction in the active region, the steady-state active-passive mass-based exchanging rate, and the mean solid residence time (SRT) of the particles in the active region increase, while (ii) the steady-state gyration radius, the streamwise velocity, and the SRT in the passive region decrease. Collectively, these highlight the need for more understanding of the effect of PSD width on the granular flow behavior in the rotating drum operating in the rolling flow regime. |
| first_indexed | 2024-10-01T04:35:43Z |
| format | Journal Article |
| id | ntu-10356/106312 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:35:43Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/1063122020-09-26T21:59:36Z A numerical study of the segregation phenomenon of lognormal particle size distributions in the rotating drum Yang, Shiliang Sun, Yuhao Zhao, Ya Chew, Jia Wei School of Chemical and Biomedical Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Particle Properties Fluid Flows DRNTU::Engineering::Bioengineering Granular materials are mostly polydisperse, which gives rise to phenomena such as segregation that has no monodisperse counterpart. The discrete element method is applied to simulate lognormal particle size distributions (PSDs) with the same arithmetic mean particle diameter but different PSD widths in a three-dimensional rotating drum operating in the rolling regime. Despite having the same mean particle diameter, as the PSD width of the lognormal PSDs increases, (i) the steady-state mixing index, the total kinetic energy, the ratio of the active region depth to the total bed depth, the mass fraction in the active region, the steady-state active-passive mass-based exchanging rate, and the mean solid residence time (SRT) of the particles in the active region increase, while (ii) the steady-state gyration radius, the streamwise velocity, and the SRT in the passive region decrease. Collectively, these highlight the need for more understanding of the effect of PSD width on the granular flow behavior in the rotating drum operating in the rolling flow regime. NRF (Natl Research Foundation, S’pore) Published version 2019-06-24T02:53:13Z 2019-12-06T22:08:53Z 2019-06-24T02:53:13Z 2019-12-06T22:08:53Z 2018 Journal Article Yang, S., Sun, Y., Zhao, Y., & Chew, J. W. (2018). A numerical study of the segregation phenomenon of lognormal particle size distributions in the rotating drum. Physics of Fluids, 30(5), 053301-. doi:10.1063/1.5026807 1070-6631 https://hdl.handle.net/10356/106312 http://hdl.handle.net/10220/48918 10.1063/1.5026807 en Physics of Fluids © 2018 The Author(s). All rights reserved. This paper was published by AIP Publishing in Physics of Fluids and is made available with permission of The Author(s). 16 p. application/pdf |
| spellingShingle | Particle Properties Fluid Flows DRNTU::Engineering::Bioengineering Yang, Shiliang Sun, Yuhao Zhao, Ya Chew, Jia Wei A numerical study of the segregation phenomenon of lognormal particle size distributions in the rotating drum |
| title | A numerical study of the segregation phenomenon of lognormal particle size distributions in the rotating drum |
| title_full | A numerical study of the segregation phenomenon of lognormal particle size distributions in the rotating drum |
| title_fullStr | A numerical study of the segregation phenomenon of lognormal particle size distributions in the rotating drum |
| title_full_unstemmed | A numerical study of the segregation phenomenon of lognormal particle size distributions in the rotating drum |
| title_short | A numerical study of the segregation phenomenon of lognormal particle size distributions in the rotating drum |
| title_sort | numerical study of the segregation phenomenon of lognormal particle size distributions in the rotating drum |
| topic | Particle Properties Fluid Flows DRNTU::Engineering::Bioengineering |
| url | https://hdl.handle.net/10356/106312 http://hdl.handle.net/10220/48918 |
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