Numerical simulation of liquid-solid flow in an unbaffled stirred tank with a pitched-blade turbine downflow
文献类型：期刊论文
| 作者 | Shan, Xiangen1; Yu, Gengzhi1,2; Yang, Chao1,2; Mao, Zai-Sha1,2; Zhang, Weigang1 |
| 刊名 | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
 |
| 出版日期 | 2008-05-07 |
| 卷号 | 47期号:9页码:2926-2940 |
| 关键词 | rushton turbine 2-phase flow suspension turbulence vessels field cfd |
| ISSN号 | 0888-5885 |
| 其他题名 | Ind. Eng. Chem. Res. |
| 中文摘要 | Computational fluid dynamics (CFD) provides an efficient method for investigating highly complex fluid flows in mechanically stirred tanks, but less attention was given to unbaffled stirred tanks generated with axial impeller, which are frequently used in process industries. The present study is intended to evaluate the CFD predictions of key properties related to the mixing against measurements and to provide a detailed insight into the process. A three-blade 70 degrees PBTD (Pitched Blade Turbine Downflow) was used to generate axial flows in a stirred tank, of which the local solid concentration profiles were numerically simulated. The liquid-solid system consisted of spherical silica beads in water. A method using "vector distance" in a Eulerian reference frame was proposed to resolve the impeller and the bottom of the tank of complex geometry. The predicted results of two-phase flows at various impeller speeds and solid holdups are presented. In addition, various Schmidt numbers and laminar viscosity coefficients of dispersion phase were tested to improve the predictions. In the experiments, an optical fiber probe was used to measure solid particle concentration, and the effects of impeller speed on solid holdup were examined. The solid particle distribution was affected with the impeller speed in the range of 113-173 rpm in the stirred tank. The radical concentration of solids particle presents different profiles at different axial cross sections. Good agreement between the experiments and simulations was observed. |
| 英文摘要 | Computational fluid dynamics (CFD) provides an efficient method for investigating highly complex fluid flows in mechanically stirred tanks, but less attention was given to unbaffled stirred tanks generated with axial impeller, which are frequently used in process industries. The present study is intended to evaluate the CFD predictions of key properties related to the mixing against measurements and to provide a detailed insight into the process. A three-blade 70 degrees PBTD (Pitched Blade Turbine Downflow) was used to generate axial flows in a stirred tank, of which the local solid concentration profiles were numerically simulated. The liquid-solid system consisted of spherical silica beads in water. A method using "vector distance" in a Eulerian reference frame was proposed to resolve the impeller and the bottom of the tank of complex geometry. The predicted results of two-phase flows at various impeller speeds and solid holdups are presented. In addition, various Schmidt numbers and laminar viscosity coefficients of dispersion phase were tested to improve the predictions. In the experiments, an optical fiber probe was used to measure solid particle concentration, and the effects of impeller speed on solid holdup were examined. The solid particle distribution was affected with the impeller speed in the range of 113-173 rpm in the stirred tank. The radical concentration of solids particle presents different profiles at different axial cross sections. Good agreement between the experiments and simulations was observed. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | RUSHTON TURBINE ; 2-PHASE FLOW ; SUSPENSION ; TURBULENCE ; VESSELS ; FIELD ; CFD |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000255466400011 |
| 公开日期 | 2013-10-08 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/2840]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100080, Peoples R China 2.Jiangsu Inst Marine Resource Exploitat, Lianyungang 222005, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shan, Xiangen,Yu, Gengzhi,Yang, Chao,et al. Numerical simulation of liquid-solid flow in an unbaffled stirred tank with a pitched-blade turbine downflow[J]. INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,2008,47(9):2926-2940. |
| APA | Shan, Xiangen,Yu, Gengzhi,Yang, Chao,Mao, Zai-Sha,&Zhang, Weigang.(2008).Numerical simulation of liquid-solid flow in an unbaffled stirred tank with a pitched-blade turbine downflow.INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH,47(9),2926-2940. |
| MLA | Shan, Xiangen,et al."Numerical simulation of liquid-solid flow in an unbaffled stirred tank with a pitched-blade turbine downflow".INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 47.9(2008):2926-2940. |
入库方式： OAI收割
来源：过程工程研究所
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