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CFD simulation of flow field and power characteristics in a vibromixer. CHEMICAL PAPERS 2023. [DOI: 10.1007/s11696-023-02749-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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Wang S, Xiong X, Liu P, Zhang Q, Zhang Q, Tao C, Wang Y, Liu Z. CFD simulation of hydrodynamics and mixing performance in dual shaft eccentric mixers. Chin J Chem Eng 2023. [DOI: 10.1016/j.cjche.2023.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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3
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Yao H, Tang J, Liu Z, Tao C, Wang Y. Chaotic Mixing Intensification and Flow Field Evolution Mechanism in a Stirred Reactor Using a Dual-Shaft Eccentric Impeller. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hong Yao
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, PR China
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China
| | - Jinjing Tang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, PR China
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China
| | - Zuohua Liu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, PR China
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China
| | - Changyuan Tao
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, PR China
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, PR China
| | - Yundong Wang
- Department of Chemical Engineering, Tsinghua University, Beijing 100084, PR China
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Simulation Analysis of Power Consumption and Mixing Time of Pseudoplastic Non-Newtonian Fluids with a Propeller Agitator. ENERGIES 2022. [DOI: 10.3390/en15134561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
In order to study the effect of a high twist rate propeller on the flow field characteristics of pseudoplastic non-Newtonian fluids, the numerical simulation method was used to analyze the mixing flow field of pseudoplastic non-Newtonian fluids at different concentrations in this paper. By changing the rotational speed and the blade installation height, the vorticity, turbulent energy, mixing power consumption, mixing time and mixing energy of the flow field were analyzed. By analyzing and comparing the research results, it was found that increasing the mixing propeller speed can effectively improve the mixing effect. Single-layer arrangement of mixing propeller is not suitable to be placed close to the bottom of the tank, and the mixing of the upper flow field is weaker. Under the same conditions, when the viscosity of pseudoplastic non-Newtonian fluid is increased, the high vorticity and high turbulence energy area is reduced to the mixing propeller area, and the time required for mixing 1.25% CMC solution is 246 times longer than that for mixing 0.62% CMC solution and the required mixing energy also increases sharply. The accuracy of the numerical simulation was verified by experiments. Considering the mixing effect and the mixing power consumption, the single-layer arrangement propeller is more suitable for mixing pseudoplastic non-Newtonian fluids with mass fraction of 0.62% CMC or below. This study can provide a reference for the practical application of propeller mixers to mix pseudoplastic non-Newtonian fluids.
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Thermal Analysis of Steady Simulation of Free Convection from Concentric Elliptical Annuli of a Horizontal Arrangement. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2022. [DOI: 10.1007/s13369-022-06717-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Huang J, Zhang B, Dai G, Chen C, Yu H, Tian H. Synergistic Effects in Coaxial Mixers: The Controlling Strategy of the Flow and Shear. Chem Eng Technol 2021. [DOI: 10.1002/ceat.202100395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Juan Huang
- School of Perfume and Aroma Technology Shanghai Institute of Technology No. 100 Haiquan Road 201418 Shanghai China
| | - Botao Zhang
- East China University of Science and Technology State Key Laboratory of Chemical Engineering No. 130 Meilong Road 201418 Shanghai China
| | - Gance Dai
- East China University of Science and Technology State Key Laboratory of Chemical Engineering No. 130 Meilong Road 201418 Shanghai China
| | - Chen Chen
- School of Perfume and Aroma Technology Shanghai Institute of Technology No. 100 Haiquan Road 201418 Shanghai China
| | - Haiyan Yu
- School of Perfume and Aroma Technology Shanghai Institute of Technology No. 100 Haiquan Road 201418 Shanghai China
| | - Huaixiang Tian
- School of Perfume and Aroma Technology Shanghai Institute of Technology No. 100 Haiquan Road 201418 Shanghai China
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Analysis of flow pattern characteristics and strengthening mechanism of co-rotating and counter-rotating mixing with double impellers on different string shafts. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2021. [DOI: 10.1515/ijcre-2021-0050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Based on two cases of the double impellers on different shafts in the co-rotating and counter-rotating, the distribution of the velocity, streamline, turbulent kinetic energy, and turbulent energy dissipation rate are obtained through three-dimensional unsteady numerical simulation. Very good agreements between experimental and numerical results have been obtained. The hydrometallurgy purification experimental platform was built with the size of one third of the simulated. The results show that the mechanical string mixing system with double impellers on different shafts can form a more obvious convection effect in the central area of the double impellers, which can effectively break the mixing isolation region and improve the mixing effect. In the co-rotating case, the two impellers can generate strong convection in the central area and form an interactive vortex and a high-speed flow channel between the two impellers. while the convection formed by counter-rotating case is weaker and the vortex structures are independent of each other. The counter-rotating system performs better in the macro momentum transfer and the co-rotating system performs better in the micro-mixing level. In the experiments of hydrometallurgy purification, 7.93% more energy is used in the co-rotating system than that of the counter-rotating system. The average energy consumed by co-rotating in the process of purifying every one percent of Cd2+ ions are 8.65% lower than that of counter-rotating. The co-rotating system can improve microscopic mass transfer effect and finally save energy and time compared to the counter-rotating system.
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Two-fluids RANS predictions of gas cavities, power consumption, mixing time and oxygen transfer rate in an aerated fermenter scale-down stirred with multiple impellers. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2020.107867] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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9
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Chemical actinometry and paraben decomposition in aqueous solution utilizing ultraviolet radiation combined with hydrogen peroxide. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01237-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ameur H. Some modifications in the Scaba 6SRGT impeller to enhance the mixing characteristics of Hershel–Bulkley fluids. FOOD AND BIOPRODUCTS PROCESSING 2019. [DOI: 10.1016/j.fbp.2019.08.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ameur H, Kamla Y, Sahel D. CFD Simulations of Mixing Characteristics of Radial Impellers in Cylindrical Reactors. ChemistrySelect 2016. [DOI: 10.1002/slct.201600579] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Houari Ameur
- Institute of Science and Technology; University Center Ahmed Salhi (Ctr Univ Naâma); 45000 Algeria
| | - Youcef Kamla
- Faculty of Technology; University Hassiba Ben Bouali of Chlef; Algeria
| | - Djamel Sahel
- Faculty of Mechanical Engineering; USTO-MB; Oran 31000 Algeria
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