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| Hydrodynamics in unbaffled liquid-solid stirred tanks with free surface studied by DEM-VOF method | |
| Kang, Qianqian1; He, Dapeng1; Zhao, Na1; Feng, Xin2,3; Wang, Jingtao1 | |
| 2020-04-15 | |
| Source Publication | CHEMICAL ENGINEERING JOURNAL
 |
| ISSN | 1385-8947 |
| Volume | 386Pages:17 |
| Abstract | DEM-VOF simulations of particle suspension dynamics in unbaffled liquid-solid stirred tanks with free surface were performed in conjunction with RSM turbulence model. The two-way coupling of particle and fluid was achieved by solving Gidaspow's drag force, non-drag force and source term in the momentum equation. The calculation of particle volume in the fluid was realized by the porous model. Particle-particle and particle-wall interactions were also considered. A four-blade 45 degrees pitched blade turbine was used, and the sliding-grid has been adopted to simulate impeller rotating. DEM-VOF coupling method was validated by theories and experiments. The effects of tank geometries, impeller rotating speed, particle density, diameter and volume fraction on the free surface vortex, flow patterns and particle suspension dynamics were investigated by DEM-VOF method for the first time. Results indicate that the particle-fluid interaction has important effects on the flow field and particle distribution. The modifications of tank geometries substantially influence flow patterns and particle suspension behaviors. The profiled bottom could eliminate sharp flow diversions completely. It can give rise to off-bottom suspension of particles and an elimination of the surface vortex due to particle-fluid interaction for large solid holdup and large particle diameter. Furthermore, the base of the profiled bottom tank was optimized. The reported research data has important guiding significance for the design of stirred tanks. |
| Keyword | DEM-VOF coupling method Liquid-solid stirred tanks Free surface Tank geometries Suspension dynamics |
| DOI | 10.1016/j.cej.2019.122846 |
| Language | 英语 |
| WOS Keyword | FLUID-DYNAMICS SIMULATION ; CFD-DEM ; NUMERICAL-SIMULATION ; AGITATED TANKS ; IMPELLER SPEED ; SUSPENSION ; PREDICTION ; FLOW ; GAS ; PARTICLES |
| Funding Project | National Science Foundation of China[21576185] ; National Science Foundation of China[21376162] |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Environmental ; Engineering, Chemical |
| Funding Organization | National Science Foundation of China |
| WOS ID | WOS:000548623400005 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/41437 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Feng, Xin; Wang, Jingtao |
| Affiliation | 1.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Kang, Qianqian,He, Dapeng,Zhao, Na,et al. Hydrodynamics in unbaffled liquid-solid stirred tanks with free surface studied by DEM-VOF method[J]. CHEMICAL ENGINEERING JOURNAL,2020,386:17. |
| APA | Kang, Qianqian,He, Dapeng,Zhao, Na,Feng, Xin,&Wang, Jingtao.(2020).Hydrodynamics in unbaffled liquid-solid stirred tanks with free surface studied by DEM-VOF method.CHEMICAL ENGINEERING JOURNAL,386,17. |
| MLA | Kang, Qianqian,et al."Hydrodynamics in unbaffled liquid-solid stirred tanks with free surface studied by DEM-VOF method".CHEMICAL ENGINEERING JOURNAL 386(2020):17. |
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