DEM-VOF simulations on the drawdown mechanisms of floating particles at free surface in turbulent stirred tanks
文献类型：期刊论文
| 作者 | Kang, Qianqian2,3; Feng, Xin1,3,4; Yang, Chao1,3; Wang, Jingtao2 |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 431页码:13 |
| 关键词 | Floating particles Drawdown mechanisms DEM-VOF simulations Free liquid surface Particle-particle collision Stirred tanks |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2021.133275 |
| 英文摘要 | The drawdown of floating particles in turbulent stirred tanks is widely encountered in industrial processes. However, the data oriented drawdown mechanisms and the dependence of particle dispersion on particle properties and stirred tank structures are lacking. Especially in the simulation works, the effect of the free liquid surface on the drawdown of particles is commonly ignored. In this work, discrete element model coupled with volume of fluid method (DEM-VOF) is used to investigate the influence of particle properties and stirred tank structures on the drawdown processes with an orthogonal experimental design (OED). Both up-pumping and down-pumping of a 45 pitched blade (PBTU and PBTD) in the flat-bottomed stirred tank are studied. The method has been verified and validated with the invasive image-based experiments. Here, it is shown that the drawdown processes of PBTU and PBTD are different. The drawdown process is divided into pull-down stage, dispersion stage and cycle stage. Particle-particle collision, the total force, the coupling force and the turbulent kinetic energy of the free liquid surface are the main drawdown mechanisms. Baffles and the impeller clearance are key factors. The optimal combinations of factors level for the most uniform distribution and the least power consumption are obtained by OED, which provides reference for further industrial applications. |
| WOS关键词 | FLUID-DYNAMICS SIMULATION ; SOLID PARTICLES ; CFD SIMULATION ; BUOYANT PARTICLES ; LIGHT PARTICLES ; LIQUID ; SUSPENSION ; PHASE ; SCALE ; FLOW |
| 资助项目 | National Key Research and Development Program[2020YFA0906804] ; National Natural Science Foundation of China[21776282] ; National Natural Science Foundation of China[21978296] ; National Natural Science Foundation of China[22078229] ; NSFC Key Program[21938009] ; NSFC Key Program[91934301] ; National Key R&D Program of China[2019YFC1905805] ; Chemistry and Chemical Engineering Guangdong Laboratory Shantou[1922006] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM2020C06] ; Youth Innovation Promotion Association CAS |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000772780800001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Key Research and Development Program ; National Natural Science Foundation of China ; NSFC Key Program ; National Key R&D Program of China ; Chemistry and Chemical Engineering Guangdong Laboratory Shantou ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; Youth Innovation Promotion Association CAS |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/52537]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Feng, Xin; Wang, Jingtao |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China 2.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 4.Chinese Acad Sci, Innovat Acad Green Mfg, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kang, Qianqian,Feng, Xin,Yang, Chao,et al. DEM-VOF simulations on the drawdown mechanisms of floating particles at free surface in turbulent stirred tanks[J]. CHEMICAL ENGINEERING JOURNAL,2022,431:13. |
| APA | Kang, Qianqian,Feng, Xin,Yang, Chao,&Wang, Jingtao.(2022).DEM-VOF simulations on the drawdown mechanisms of floating particles at free surface in turbulent stirred tanks.CHEMICAL ENGINEERING JOURNAL,431,13. |
| MLA | Kang, Qianqian,et al."DEM-VOF simulations on the drawdown mechanisms of floating particles at free surface in turbulent stirred tanks".CHEMICAL ENGINEERING JOURNAL 431(2022):13. |
入库方式： OAI收割
来源：过程工程研究所
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