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Oshitani J, Hino M, Oshiro S, Mawatari Y, Tsuji T, Jiang Z, Franks GV. Conversion air velocity at which reverse density segregation converts to normal density segregation in a vibrated fluidized bed of binary particulate mixtures. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Tiwari SS, Ghatage SV, Joshi JB, Kong B. Segregation and intermixing in polydisperse liquid–solid fluidized beds: A multifluid model validation study. AIChE J 2022. [DOI: 10.1002/aic.17725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shashank S. Tiwari
- Department of Chemical Engineering Guangdong Technion‐Israel Institute of Technology Shantou Guangdong China
- Department of Chemical Engineering Institute of Chemical Technology Matunga Mumbai India
| | | | - Jyeshtharaj B. Joshi
- Department of Chemical Engineering Institute of Chemical Technology Matunga Mumbai India
- Homi Bhabha National Institute Anushaktinagar Mumbai India
| | - Bo Kong
- Department of Chemical Engineering Guangdong Technion‐Israel Institute of Technology Shantou Guangdong China
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Xie Z, Wang S, Shen Y. CFD-DEM study of segregation and mixing characteristics under a bi-disperse solid-liquid fluidised bed. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.09.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Investigations of Gas–Particle Two-Phase Flow in Swirling Combustor by the Particle Stokes Numbers. Processes (Basel) 2021. [DOI: 10.3390/pr9060951] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Gas turbulence modulations and particle dispersions of swirling gas–particle two-phase flow in the combustor is investigated under the large spans of the particle Stokes numbers. To fully consider the preferential concentrations and anisotropic dispersions of a particle, a kinetic frictional stress model coupled with a second-order moment two-phase turbulent model and granular temperature equation is improved. The proposed modeling and simulations are in good agreement with the experimental validations. Results show turbulent modulations and particle dispersions exhibit strongly anisotropic characteristics, keeping a close relationship with flow structure. The axial gas velocity and RMS fluctuation velocity of 45.0-μm EGP was approximately 5.0 times and 3.0 times greater than 1000.0 μm Copper particles, and their axial particle velocity was 0.25 times and twice greater than those of 45.0 μm EGP. The degree of modulation in the axial–radial direction is larger than those of radial–tangential and axial–tangential direction. Particle dispersions are sensitive to particle diameter parameters and intensified by higher Stokes number.
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Effects of Velocity and Permeability on Tracer Dispersion in Porous Media. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11104411] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
During micro-scale tracer flow in porous media, the permeability and fluid velocity significantly affect the fluid dispersion properties of the media. However, the relationships between the dispersion coefficient, permeability, and fluid velocity in core samples are still not clearly understood. Two sets of experiments were designed to study the effects of tracer fluid flow velocity and porous medium permeability on the dispersion phenomenon in a core environment, using natural and sand-filled cores, respectively. From experimental data-fitting by a mathematical model, the relationship between the dispersion coefficient, flow velocity, and permeability was identified, allowing the analysis of the underlying mechanism behind this phenomenon. The results show that a higher volumetric flow rate and lower permeability cause a delay in the tracer breakthrough time and an increase in the dispersion coefficient. The core experimental results show that the dispersion coefficient is negatively correlated with the permeability and positively correlated with the superficial velocity. The corresponding regression equations indicate linear relations between the dispersion coefficient, core permeability, and fluid velocity, resulting from the micron scale of grain diameters in cores. The combination of high velocity and low permeability yields a large dispersion coefficient. The effects of latitudinal dispersion in porous media cannot be ignored in low-permeability cores or formations. These findings can help to improve the understanding of tracer flow in porous media, the design of injection parameters, and the interpretation of tracer concentration distribution in inter-well tracer tests.
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Khan MS, Evans GM, Nguyen AV, Mitra S. Analysis of particle dispersion coefficient in solid-liquid fluidised beds. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2019.03.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Peng Z, Galvin K, Doroodchi E. Influence of inclined plates on flow characteristics of a liquid-solid fluidised bed: A CFD-DEM study. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2018.11.047] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Cahyadi A, Fane AG, Chew JW. Correlating the hydrodynamics of fluidized media with the extent of membrane fouling mitigation: Effect of bidisperse GAC mixtures. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.10.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Khan MS, Evans GM, Peng Z, Doroodchi E, Moghtaderi B, Joshi JB, Mitra S. Expansion behaviour of a binary solid-liquid fluidised bed with different solid mass ratio. ADV POWDER TECHNOL 2017. [DOI: 10.1016/j.apt.2017.09.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Segregation and dispersion studies in binary solid-liquid fluidised beds: A theoretical and computational study. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2016.12.070] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Tripathy A, Bagchi S, Biswal S, Meikap B. Study of particle hydrodynamics and misplacement in liquid–solid fluidized bed separator. Chem Eng Res Des 2017. [DOI: 10.1016/j.cherd.2016.11.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Peng Z, Joshi JB, Moghtaderi B, Khan MS, Evans GM, Doroodchi E. Segregation and dispersion of binary solids in liquid fluidised beds: A CFD-DEM study. Chem Eng Sci 2016. [DOI: 10.1016/j.ces.2016.05.032] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Peng Z, Moghtaderi B, Doroodchi E. A simple model for predicting solid concentration distribution in binary-solid liquid fluidized beds. AIChE J 2016. [DOI: 10.1002/aic.15420] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhengbiao Peng
- Priority Research Centre for Frontier Energy Technologies & Utilisation, The University of Newcastle, Callaghan; NSW 2308 Australia
| | - Behdad Moghtaderi
- Priority Research Centre for Frontier Energy Technologies & Utilisation, The University of Newcastle, Callaghan; NSW 2308 Australia
| | - Elham Doroodchi
- Priority Research Centre for Frontier Energy Technologies & Utilisation, The University of Newcastle, Callaghan, NSW, Australia and Priority Research Centre for Advanced Particle Processing and Transport, The University of Newcastle; Callaghan NSW 2308 Australia
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Oshitani J, Teramoto K, Yoshida M, Kubo Y, Nakatsukasa S, Franks GV. Dry beneficiation of fine coal using density-segregation in a gas–solid fluidized bed. ADV POWDER TECHNOL 2016. [DOI: 10.1016/j.apt.2016.05.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Oshitani J, Ohnishi M, Yoshida M, Franks GV, Kubo Y, Nakatsukasa S. Dry separation of particulate iron ore using density-segregation in a gas–solid fluidized bed. ADV POWDER TECHNOL 2013. [DOI: 10.1016/j.apt.2012.11.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Han IS, Lim HO, Kim KT, Kang Y, Jun KW. Particle dispersion and fluctuations in viscous liquid-solid fluidised Beds. CAN J CHEM ENG 2012. [DOI: 10.1002/cjce.21716] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Patel BK, Ramirez WF, Galvin K. A generalized segregation and dispersion model for liquid-fluidized beds. Chem Eng Sci 2008. [DOI: 10.1016/j.ces.2007.12.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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