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Numerical study on gas–liquid two-phase flow and mass transfer in a microchannel

  • Jin Zunlong , Liu Yonghao , Dong Rui , Wang Dingbiao und Chen Xiaotang
Veröffentlicht/Copyright: 15. Februar 2021
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International Journal of Chemical Reactor Engineering
Aus der Zeitschrift International Journal of Chemical Reactor Engineering Band 19 Heft 3

Abstract

A numerical study of the gas–liquid two-phase flow and mass transfer in a square microchannel with a T-junction is carried out in this work. Through numerical simulation methods, the flow patterns of bubble flow, slug flow and annular flow are determined. By proposing a new flow pattern conversion relationship with different media and different speeds, 100 sets of CO2-water flow patterns and 100 sets of CO2-ethanol flow patterns are obtained. The effects of surface tension on flow pattern, bubble length and liquid plug length are studied. The pressure distribution and pressure drop are analyzed, and mass transfer is obtained through slug flow simulation, and the influencing factors of gas–liquid mass transfer are studied. The results show that the effect of surface tension on the length of the bubble and the length of the liquid plug is completely opposite, the pressure distribution is stepped, and the pressure drop increases with the increase of the gas–liquid velocity. In addition, it was found that the volumetric mass transfer coefficients of the bubble cap and the liquid film gradually decreased with time, and eventually stabilized. The increase in bubble velocity accelerates the mass transfer rate, while the increase in unit cell length slows the mass transfer rate. However, the influence of film thickness and liquid film length on mass transfer varies with time.

Keywords: gas–liquid two-phase; mass transfer; microchannel
Corresponding author: Chen Xiaotang, Editorial Board of Journal of Zhengzhou University, Zhengzhou, 450001, P. R. China, E-mail:

Funding source: National Natural Science Foundation of China

Award Identifier / Grant number: 21676257

Acknowledgments

We gratefully acknowledge the financial supports for this project from the National Natural Science Foundation of China (No. 21676257).

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: We gratefully acknowledge the financial supports for this project from the National Natural Science Foundation of China (No. 21676257).

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2020-09-01
Accepted: 2021-01-26
Published Online: 2021-02-15

© 2021 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/ijcre-2020-0162
Schlagwörter für diesen Artikel
gas–liquid two-phase; mass transfer; microchannel

Artikel in diesem Heft

  1. Frontmatter
  2. Articles
  3. Performance and microbial community of a novel PVA/iron-carbon (Fe–C) immobilized bioreactor for nitrate removal from groundwater
  4. Modeling of dry reforming of methane for hydrogen production at low temperatures using membrane reactor
  5. Formation mechanism and chaotic reinforcement elimination of the mechanical stirring isolated mixed region
  6. CFD-DEM simulation of powders clogging in a packed bed with lateral inlet
  7. Degradation of basic violet 16 dye by electro-activated persulfate process from aqueous solutions and toxicity assessment using microorganisms: determination of by-products, reaction kinetic and optimization using Box–Behnken design
  8. Propargyloligosilazane matrixed composite for high temperature material combining polymer and ceramic properties
  9. An application of continuous flow microreactor in the synthesis and extraction of rabeprazole
  10. Numerical study on gas–liquid two-phase flow and mass transfer in a microchannel
  11. A new two-layer passive micromixer design based on SAR-vortex principles
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