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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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2
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Shiue A, Zhu L, Wang CL, Jeng JC, Leggett G. Mixing performance of a non-Newtonian fluid in a coaxial agitated impeller reactor. J Taiwan Inst Chem Eng 2023. [DOI: 10.1016/j.jtice.2023.104715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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3
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Tang X, Qiu F, Li H, Zhang Q, Quan X, Tao C, Wang Y, Liu Z. Investigation of the Intensified Chaotic Mixing and Flow Structures Evolution Mechanism in Stirred Reactor with Torsional Rigid-Flexible Impeller. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c03512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Xiaoyu Tang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing400044, China
| | - Facheng Qiu
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing400054, China
| | - Hong Li
- Graduate School, Chongqing University, Chongqing400044, China
| | - Qian Zhang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing400044, China
| | - Xuejun Quan
- School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing400054, China
| | - Changyuan Tao
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing400044, China
| | - Yundong Wang
- Department of Chemical Engineering, Tsinghua University, Beijing100084, China
| | - Zuohua Liu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing400044, China
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Chaotic mixing properties under rotation plus revolution revealed by purification experiments and numerical simulations. J Taiwan Inst Chem Eng 2023. [DOI: 10.1016/j.jtice.2022.104652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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5
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Barros PL, Ein-Mozaffari F, Lohi A. Power Consumption Characterization of Energy-Efficient Aerated Coaxial Mixers Containing Yield-Stress Biopolymer Solutions. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paloma L. Barros
- Department of Chemical Engineering, Toronto Metropolitan University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
| | - Farhad Ein-Mozaffari
- Department of Chemical Engineering, Toronto Metropolitan University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
| | - Ali Lohi
- Department of Chemical Engineering, Toronto Metropolitan University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
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6
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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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7
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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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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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Amiraftabi M, Khiadani M, Mohammed HA, Arshad A. CFD-PBM and experimental investigation of a shear thinning fluid in a gas-liquid tank agitated by a helical ribbon impeller. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118855] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Jamshidzadeh M, Ein‐Mozaffari F, Lohi A. Local and overall gas holdup in an aerated coaxial mixing system containing a non‐
Newtonian
fluid. AIChE J 2020. [DOI: 10.1002/aic.17016] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Maryam Jamshidzadeh
- Department of Chemical Engineering Ryerson University Toronto Ontario Canada
| | | | - Ali Lohi
- Department of Chemical Engineering Ryerson University Toronto Ontario Canada
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11
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Tamburini A, Gagliano G, Micale G, Brucato A, Scargiali F, Ciofalo M. Direct numerical simulations of creeping to early turbulent flow in unbaffled and baffled stirred tanks. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.07.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Performance of Helical Ribbon and Screw Impellers for Mixing Viscous Fluids in Cylindrical Reactors. CHEMENGINEERING 2018. [DOI: 10.3390/chemengineering2020026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Synergistic and interference effects in coaxial mixers: Numerical analysis of the power consumption. Chin J Chem Eng 2018. [DOI: 10.1016/j.cjche.2017.10.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Ghobadi N, Ogino C, Ogawa T, Ohmura N. Mixing Characteristics of Submerged Fungal Fluid in a Flexible Stirred Mixer System. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2018. [DOI: 10.1252/jcej.17we010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Narges Ghobadi
- Department of Chemical Science and Engineering Graduate School of Engineering
| | - Chiaki Ogino
- Department of Chemical Science and Engineering Graduate School of Engineering
| | - Tomohiro Ogawa
- Division of Process Equipment, Kobelco Eco-Solutions, Co., Ltd
| | - Naoto Ohmura
- Department of Chemical Science and Engineering Graduate School of Engineering
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Ameur H. Mixing of Shear Thinning Fluids in Cylindrical Tanks: Effect of the Impeller Blade Design and Operating Conditions. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2016. [DOI: 10.1515/ijcre-2015-0200] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The 3D flow fields and power consumption within a cylindrical vessel stirred by a rotating turbine are numerically studied. Simulations are performed to determine the impact of changes in operating parameters on the mixing characteristics. Investigations are focused on effects of the impeller blade curvature, shaft speed and impeller rotational direction. The fluid simulated has a shear thinning behavior. Designing the blade in retreat shape seems very promising in term of power consumption since a reduction of Np is obtained with increasing blade curvature. In the positive rotational direction, the retreat bladed impeller yields highly radial flows with less power consumption than the straight bladed impeller. The 45° retreat blade gave an increase in the radial velocity by 39 %, compared with the straight blade. But, a better axial circulation is obtained with the straight blade. The comparison between the positive rotational direction (+w) and the negative rotational direction (–w) cases revealed that, a reduced mixing time can be obtained with a retreat bladed impeller operating in the negative rotational direction (–w), but with further power consumption.
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