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CFD analysis on hydrodynamics and residence time distribution in a gas-liquid vortex unit

Siyuan Chen (UGent) , Yi Ouyang (UGent) , Laurien Vandewalle (UGent) , Geraldine Heynderickx (UGent) and Kevin Van Geem (UGent)
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Abstract
A gas-liquid vortex unit (GLVU) operates in a centrifugal force field which significantly intensifies the gas-liquid mixing and interphase mass transfer. Experimentally obtaining detailed hydrodynamic information on the flow behavior and mixing process in a GLVU is difficult due to the presence of a highly turbulent liquid layer. In this study, a 3D computational fluid dynamics (CFD) Euler-Euler model is developed to study hydrodynamics and residence time distribution in a GLVU. The numerical results are validated using experimentally obtained pressure drop measurements and liquid velocity data. The liquid layer is found to rotate in the vortex chamber and suppress the gas phase vortex flow. Near the gas injection slots, the flow behavior is similar as in a continuous stirred tank reactor (CSTR), improving mixing and mass transfer efficiency. Finally, our CFD results show that the use of multiple liquid inlets results in an even more uniform liquid velocity distribution in the vortex unit, which further improves the performance of the GLVU.
Keywords
Industrial and Manufacturing Engineering, General Chemical Engineering, Environmental Chemistry, General Chemistry, Vortex flowCFD, Gas-liquid hydrodynamics, Residence time distribution, Vortex unit optimization, ROTATING PACKED-BED, MASS-TRANSFER, FLOW CHARACTERISTICS, PROCESS INTENSIFICATION, MODEL, SIMULATION, REACTOR, VALIDATION, PREDICTION, PYROLYSIS

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Citation

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MLA
Chen, Siyuan, et al. “CFD Analysis on Hydrodynamics and Residence Time Distribution in a Gas-Liquid Vortex Unit.” CHEMICAL ENGINEERING JOURNAL, vol. 446, no. Part 2, 2022, doi:10.1016/j.cej.2022.136812.
APA
Chen, S., Ouyang, Y., Vandewalle, L., Heynderickx, G., & Van Geem, K. (2022). CFD analysis on hydrodynamics and residence time distribution in a gas-liquid vortex unit. CHEMICAL ENGINEERING JOURNAL, 446(Part 2). https://doi.org/10.1016/j.cej.2022.136812
Chicago author-date
Chen, Siyuan, Yi Ouyang, Laurien Vandewalle, Geraldine Heynderickx, and Kevin Van Geem. 2022. “CFD Analysis on Hydrodynamics and Residence Time Distribution in a Gas-Liquid Vortex Unit.” CHEMICAL ENGINEERING JOURNAL 446 (Part 2). https://doi.org/10.1016/j.cej.2022.136812.
Chicago author-date (all authors)
Chen, Siyuan, Yi Ouyang, Laurien Vandewalle, Geraldine Heynderickx, and Kevin Van Geem. 2022. “CFD Analysis on Hydrodynamics and Residence Time Distribution in a Gas-Liquid Vortex Unit.” CHEMICAL ENGINEERING JOURNAL 446 (Part 2). doi:10.1016/j.cej.2022.136812.
Vancouver
1.
Chen S, Ouyang Y, Vandewalle L, Heynderickx G, Van Geem K. CFD analysis on hydrodynamics and residence time distribution in a gas-liquid vortex unit. CHEMICAL ENGINEERING JOURNAL. 2022;446(Part 2).
IEEE
[1]
S. Chen, Y. Ouyang, L. Vandewalle, G. Heynderickx, and K. Van Geem, “CFD analysis on hydrodynamics and residence time distribution in a gas-liquid vortex unit,” CHEMICAL ENGINEERING JOURNAL, vol. 446, no. Part 2, 2022.
@article{8764526,
  abstract     = {{A gas-liquid vortex unit (GLVU) operates in a centrifugal force field which significantly intensifies the gas-liquid mixing and interphase mass transfer. Experimentally obtaining detailed hydrodynamic information on the flow behavior and mixing process in a GLVU is difficult due to the presence of a highly turbulent liquid layer. In this study, a 3D computational fluid dynamics (CFD) Euler-Euler model is developed to study hydrodynamics and residence time distribution in a GLVU. The numerical results are validated using experimentally obtained pressure drop measurements and liquid velocity data. The liquid layer is found to rotate in the vortex chamber and suppress the gas phase vortex flow. Near the gas injection slots, the flow behavior is similar as in a continuous stirred tank reactor (CSTR), improving mixing and mass transfer efficiency. Finally, our CFD results show that the use of multiple liquid inlets results in an even more uniform liquid velocity distribution in the vortex unit, which further improves the performance of the GLVU.}},
  articleno    = {{136812}},
  author       = {{Chen, Siyuan and Ouyang, Yi and Vandewalle, Laurien and Heynderickx, Geraldine and Van Geem, Kevin}},
  issn         = {{1385-8947}},
  journal      = {{CHEMICAL ENGINEERING JOURNAL}},
  keywords     = {{Industrial and Manufacturing Engineering,General Chemical Engineering,Environmental Chemistry,General Chemistry,Vortex flowCFD,Gas-liquid hydrodynamics,Residence time distribution,Vortex unit optimization,ROTATING PACKED-BED,MASS-TRANSFER,FLOW CHARACTERISTICS,PROCESS INTENSIFICATION,MODEL,SIMULATION,REACTOR,VALIDATION,PREDICTION,PYROLYSIS}},
  language     = {{eng}},
  number       = {{Part 2}},
  pages        = {{13}},
  title        = {{CFD analysis on hydrodynamics and residence time distribution in a gas-liquid vortex unit}},
  url          = {{http://doi.org/10.1016/j.cej.2022.136812}},
  volume       = {{446}},
  year         = {{2022}},
}

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