| Mixing and dispersion behaviours of ellipsoid particles in a bubbling fluidized bed | |
Yang, Shiliang; Hu, Site1; Zhang WT(张炆涛)
| |
| Source Publication | POWDER TECHNOLOGY
 |
| 2022-01 | |
| Volume | 396Pages:210 |
| ISSN | 0032-5910 |
| Abstract | Fluidization of non-spherical particles is widely practised in chemical engineering processes. In this work, the mixing and dispersion behaviours of non-spherical particles in a bubbling fluidized bed (BFB) are explored by a computational fluid dynamics-discrete element method (CFD-DEM) featuring a super-quadric model to describe particle morphology. After model validation, the general flow patterns, solid mixing, and solid dispersion of ellipsoid particles are studied, together with the discussion of the effect of aspect ratio (AR) on fluidization behaviours. The results show that minimum fluidization velocity increases with the aspect ratio. Bed permeability depends on bed porosity and particle shape. Bubbles place a significant role in determining flow patterns, which induce a double-recirculation pattern where particles mainly move from the wall region to the central region in the lower bed and oppositely in the upper bed. Ellipsoid particles with higher sphericity (e.g., AR = 0.75 and 1.5) show a smaller mixing index in the bed. The magnitudes of solid dispersion coefficients in x,y, and z directions are about similar to 10(-3) m(2)/s, similar to 10(-5) m(2)/s, and similar to 10(-2) m(2)/s, respectively. Ellipsoid particles with higher sphericity show larger solid dispersion intensity. These findings shed light on the fundamental understanding of the particle shape on fluidization dynamics. (C) 2021 Elsevier B.V. All rights reserved. |
| Keyword | Non-spherical particles Discrete element method Solid mixing Solid dispersion Fluidized bed |
| Subject Area | Engineering, Chemical |
| DOI | 10.1016/j.powtec.2021.10.036 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000722586000001 |
| Funding Organization | Applied Basic Research Project of Yunnan Province, China [202001AU070030] |
| Classification | 二类/Q1 |
| Ranking | 1 |
| Contributor | Zhang, WT (corresponding author), Midea Corp Res Ctr, Foshan 528311, Guangdong, Peoples R China. |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/90215 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cl, Kunming 650093, Yunnan, Peoples R China 2.Midea Corp Res Ctr, Foshan 528311, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Yang, Shiliang,Hu, Site,Zhang WT. Mixing and dispersion behaviours of ellipsoid particles in a bubbling fluidized bed[J]. POWDER TECHNOLOGY,2022,396:210.Rp_Au:Zhang, WT (corresponding author), Midea Corp Res Ctr, Foshan 528311, Guangdong, Peoples R China. |
| APA | Yang, Shiliang,Hu, Site,&张炆涛.(2022).Mixing and dispersion behaviours of ellipsoid particles in a bubbling fluidized bed.POWDER TECHNOLOGY,396,210. |
| MLA | Yang, Shiliang,et al."Mixing and dispersion behaviours of ellipsoid particles in a bubbling fluidized bed".POWDER TECHNOLOGY 396(2022):210. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| Jp2022FA586_2022_Mix（3670KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment