Direct numerical simulation of turbulent liquid鈥搒olid flow in a small-scale stirred tank
文献类型：期刊论文
| 作者 | Chang, Qi1,2; Di, Shengbin2; Xu, Ji2,4; Ge, Wei2,3,4 |
| 刊名 | Chemical Engineering Journal
 |
| 出版日期 | 2021-09-15 |
| 卷号 | 420 |
| 关键词 | Liquids - Turbulence - Tanks (containers) - Turbulent flow - Drag - Numerical models - Impellers - Reynolds number |
| ISSN号 | 13858947 |
| DOI | 10.1016/j.cej.2020.127562 |
| 英文摘要 | Particle-resolved direct numerical simulation of a 4-baffled cylindrical stirred tank with a 6-pitched blade-turbine-downflow (PBTD) impeller was carried out for the first time to understand the hydrodynamic characteristics of its turbulent solid鈥搇iquid flow. The fluid-particle and fluid-wall interactions are numerically described by the immersed boundary method (IBM) with smeared and sharp interfaces jointly on a staggered Cartesian grid. The particle diameter is 1 mm, and the impeller rotation speed changes between 23.88 and 15.88 rev/s, resulting in the impeller Reynolds number at 7031 and 4676, respectively, belonging to medium turbulent regime. The average solid volume fraction ranged from 0 to 0.1. The effect of particle inertia was also investigated by changing the particle鈥揻luid density ratio from 1.5 to 3.0. Analysis of the simulation results indicates turbulence suppression in the bulk region and particle-induced strengthening of the axial liquid circulation. The quasi-steady and unsteady drag is correlated to the relative turbulence intensity and the turbulence dissipation rate obtained from the simulation data, respectively. 漏 2020 Elsevier B.V. |
| 学科主题 | Direct Numerical Simulation |
| 项目编号 | The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (Grand Nos. 21821005 and 91834303) and the Chinese Academy of Sciences (Grant Nos. QYZDJ-SSW-JSC029, XXH13506-301, and XDA21030700). |
| 出版者 | Elsevier B.V. |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/60322]  |
| 作者单位 | 1.School of Chemical Engineering and Technology, Tianjin University, Tianjin; 300072, China 2.State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing; 100190, China 3.School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China 4.Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing; 100190, China |
| 推荐引用方式 GB/T 7714 | Chang, Qi,Di, Shengbin,Xu, Ji,等. Direct numerical simulation of turbulent liquid鈥搒olid flow in a small-scale stirred tank[J]. Chemical Engineering Journal,2021,420. |
| APA | Chang, Qi,Di, Shengbin,Xu, Ji,&Ge, Wei.(2021).Direct numerical simulation of turbulent liquid鈥搒olid flow in a small-scale stirred tank.Chemical Engineering Journal,420. |
| MLA | Chang, Qi,et al."Direct numerical simulation of turbulent liquid鈥搒olid flow in a small-scale stirred tank".Chemical Engineering Journal 420(2021). |
入库方式： OAI收割
来源：过程工程研究所
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