Numerical Simulation of Dense Solid-Liquid Mixing in Stirred Vessel with Improved Dual Axial Impeller
Computational fluid dynamics (CFDs) were adopted in order to investigate the solid suspending process in a dense solid–liquid system (with a solid volume fraction of 30%), agitated by a traditional dual axial impeller and a modified dual axial impeller, otherwise known as a dual triple blade impelle...
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MDPI AG
2022-05-01
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| author | Xia Xiong Zuohua Liu Changyuan Tao Yundong Wang Fangqin Cheng |
| author_facet | Xia Xiong Zuohua Liu Changyuan Tao Yundong Wang Fangqin Cheng |
| author_sort | Xia Xiong |
| collection | DOAJ |
| description | Computational fluid dynamics (CFDs) were adopted in order to investigate the solid suspending process in a dense solid–liquid system (with a solid volume fraction of 30%), agitated by a traditional dual axial impeller and a modified dual axial impeller, otherwise known as a dual triple blade impeller (DTBI) and a dual rigid-flexible triple blade impeller (DRFTBI), respectively. The effects of rotational speed, connection strap length/width, and off-bottom clearance on the solid distribution were investigated. The results show that the proportion of solid concentration larger than 0.4 in the DTBI system was 26.56 times of that in the DRFTBI system. This indicates that the DRFTBI system can strengthen the solid suspension and decrease the solid accumulation in the bottom of the tank. Furthermore, the velocity and turbulent kinetic energy in the DRFTBI system were promoted. In addition, for an optimal selection, the optimum length of connection strap was 1.2 H<sub>1</sub>, the optimum range of connection strap width was D/7–D/8, and the off-bottom clearance selected as T/4 was better. |
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| issn | 2297-8739 |
| language | English |
| last_indexed | 2024-03-10T01:52:26Z |
| publishDate | 2022-05-01 |
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| spelling | doaj.art-ed1530ac07ff4e6ea3b944a688f6c9f72023-11-23T13:04:37ZengMDPI AGSeparations2297-87392022-05-019512210.3390/separations9050122Numerical Simulation of Dense Solid-Liquid Mixing in Stirred Vessel with Improved Dual Axial ImpellerXia Xiong0Zuohua Liu1Changyuan Tao2Yundong Wang3Fangqin Cheng4School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, ChinaDepartment of Chemical Engineering, Tsinghua University, Beijing 100084, ChinaInstitute of Resources and Environment Engineering, Shanxi University, Taiyuan 030006, ChinaComputational fluid dynamics (CFDs) were adopted in order to investigate the solid suspending process in a dense solid–liquid system (with a solid volume fraction of 30%), agitated by a traditional dual axial impeller and a modified dual axial impeller, otherwise known as a dual triple blade impeller (DTBI) and a dual rigid-flexible triple blade impeller (DRFTBI), respectively. The effects of rotational speed, connection strap length/width, and off-bottom clearance on the solid distribution were investigated. The results show that the proportion of solid concentration larger than 0.4 in the DTBI system was 26.56 times of that in the DRFTBI system. This indicates that the DRFTBI system can strengthen the solid suspension and decrease the solid accumulation in the bottom of the tank. Furthermore, the velocity and turbulent kinetic energy in the DRFTBI system were promoted. In addition, for an optimal selection, the optimum length of connection strap was 1.2 H<sub>1</sub>, the optimum range of connection strap width was D/7–D/8, and the off-bottom clearance selected as T/4 was better.https://www.mdpi.com/2297-8739/9/5/122solid–liquid suspensionnumerical simulationhigh solid concentrationmodified impeller |
| spellingShingle | Xia Xiong Zuohua Liu Changyuan Tao Yundong Wang Fangqin Cheng Numerical Simulation of Dense Solid-Liquid Mixing in Stirred Vessel with Improved Dual Axial Impeller Separations solid–liquid suspension numerical simulation high solid concentration modified impeller |
| title | Numerical Simulation of Dense Solid-Liquid Mixing in Stirred Vessel with Improved Dual Axial Impeller |
| title_full | Numerical Simulation of Dense Solid-Liquid Mixing in Stirred Vessel with Improved Dual Axial Impeller |
| title_fullStr | Numerical Simulation of Dense Solid-Liquid Mixing in Stirred Vessel with Improved Dual Axial Impeller |
| title_full_unstemmed | Numerical Simulation of Dense Solid-Liquid Mixing in Stirred Vessel with Improved Dual Axial Impeller |
| title_short | Numerical Simulation of Dense Solid-Liquid Mixing in Stirred Vessel with Improved Dual Axial Impeller |
| title_sort | numerical simulation of dense solid liquid mixing in stirred vessel with improved dual axial impeller |
| topic | solid–liquid suspension numerical simulation high solid concentration modified impeller |
| url | https://www.mdpi.com/2297-8739/9/5/122 |
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