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Multi-objective optimization of stirring tank based on multiphase flow simulation. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.11.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Influence of the Impeller Diameter and Off-Bottom Clearance on the Flow Velocity Distribution Characteristics Near the Bottom inside a Flotation Machine. MINERALS 2020. [DOI: 10.3390/min11010031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The solid particle suspension inside a flotation machine is significantly dependent on the flow field, particularly the flow hydrodynamics characteristics near the bottom of the flotation machine. In this study, a laser Doppler anemometer (LDA) was utilized to investigate the influence of the impeller diameter and the impeller off-bottom clearance of a flotation machine on the flow velocity distribution characteristics near its bottom. The results showed that centripetal, centrifugal, and transitional spiral ascending vortexes were generated for different cases of the impeller variables. The impeller diameter and the off-bottom clearance were found to have a significant and interactive influence on the flow pattern, radial and axial velocities, velocity vector distribution, and axial fluctuating root mean square (RMS) velocity characteristics. When the centripetal flow was generated with a large impeller diameter and a small off-bottom clearance, the vortex stability was improved, the low-velocity distribution area was reduced near the bottom center, and the high axial RMS velocity distribution area was extended and became more consistent. The latter provided an advantageous condition for the momentum transfer between the liquid flow and the solid particles, as well as the airflow. However, the axial RMS velocity in the centrifugal flow formed in other cases of the impeller variables was less than that in the centripetal flow. Although the increase in the impeller off-bottom clearance contributed to increasing the velocity magnitude, this is certainly disadvantageous to the service life of the impeller blades, as expected from the high-velocity area extension. These results may provide a reference for the impeller design and optimization of a KYF (Kuang Yuan Flotation) flotation machine, as well as a basis for further investigation on the behavior of the dispersed phases inside a flow field.
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Liu M, Gou S, Wu Q, Yang X, He Y, Zhou L, Tang L, Liu L, Duan M. Ionic liquids as an effective additive for improving the solubility and rheological properties of hydrophobic associating polymers. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111833] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Cortada-Garcia M, Weheliye WH, Dore V, Mazzei L, Angeli P. Computational fluid dynamic studies of mixers for highly viscous shear thinning fluids and PIV validation. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.01.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kennedy S, Bhattacharjee PK, Eshtiaghi N, Parthasarathy R. Accelerating the spread of the active mixing region in a sludge simulant using submerged jets. Chem Eng Res Des 2016. [DOI: 10.1016/j.cherd.2016.08.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Patel D, Ein-Mozaffari F, Mehrvar M. Effect of rheological parameters on non-ideal flows in the continuous-flow mixing of biopolymer solutions. Chem Eng Res Des 2015. [DOI: 10.1016/j.cherd.2015.05.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Xiao Q, Yang N, Zhu J, Guo L. Modeling of cavern formation in yield stress fluids in stirred tanks. AIChE J 2014. [DOI: 10.1002/aic.14470] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Qi Xiao
- State Key Laboratory of Multiphase Flow in Power Engineering; Xi'an Jiaotong University; Xi'an Shaanxi 710049 P.R. China
- State Key Laboratory of Multiphase Complex Systems; Institute of Process Engineering, Chinese Academy of Sciences; Beijing 100190 P.R. China
| | - Ning Yang
- State Key Laboratory of Multiphase Complex Systems; Institute of Process Engineering, Chinese Academy of Sciences; Beijing 100190 P.R. China
| | - Jiahua Zhu
- School of Chemical Engineering, Sichuan University; Chengdu Sichuan 610065 P.R. China
| | - Liejin Guo
- State Key Laboratory of Multiphase Flow in Power Engineering; Xi'an Jiaotong University; Xi'an Shaanxi 710049 P.R. China
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Alberini F, Simmons MJH, Ingram A, Stitt EH. Use of an areal distribution of mixing intensity to describe blending of non‐newtonian fluids in a kenics KM static mixer using PLIF. AIChE J 2013. [DOI: 10.1002/aic.14237] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- F. Alberini
- School of Chemical EngineeringUniversity of BirminghamBirminghamB15 2TT U.K
| | - M. J. H. Simmons
- School of Chemical EngineeringUniversity of BirminghamBirminghamB15 2TT U.K
| | - A. Ingram
- School of Chemical EngineeringUniversity of BirminghamBirminghamB15 2TT U.K
| | - E. H. Stitt
- Johnson Matthey Technology CentreBillinghamTS23 1LB U.K
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Patel D, Ein-Mozaffari F, Mehrvar M. Tomography images to analyze the deformation of the cavern in the continuous-flow mixing of non-Newtonian fluids. AIChE J 2013. [DOI: 10.1002/aic.14235] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dineshkumar Patel
- Dept. of Chemical Engineering; Ryerson University; Toronto ON M5B 2K3 Canada
| | | | - Mehrab Mehrvar
- Dept. of Chemical Engineering; Ryerson University; Toronto ON M5B 2K3 Canada
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Patel D, Ein-Mozaffari F, Mehrvar M. Characterization of the continuous-flow mixing of non-Newtonian fluids using the ratio of residence time to batch mixing time. Chem Eng Res Des 2013. [DOI: 10.1016/j.cherd.2013.01.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Patel D, Ein-Mozaffari F, Mehrvar M. Using Tomography to Characterize the Mixing of Non-Newtonian Fluids with a Maxblend Impeller. Chem Eng Technol 2013. [DOI: 10.1002/ceat.201200425] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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12
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Patel D, Ein-Mozaffari F, Mehrvar M. Using ultrasonic Doppler velocimetry to investigate the mixing of non-Newtonian fluids. ACTA ACUST UNITED AC 2012. [DOI: 10.1088/1757-899x/42/1/012048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Improving the dynamic performance of continuous-flow mixing of pseudoplastic fluids possessing yield stress using Maxblend impeller. Chem Eng Res Des 2012. [DOI: 10.1016/j.cherd.2011.08.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Patel D, Ein-Mozaffari F, Mehrvar M. Effect of impeller type on continuous-flow mixing of non-Newtonian fluids in stirred vessels through dynamic tests. CAN J CHEM ENG 2011. [DOI: 10.1002/cjce.21628] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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