Simulation of the hydrodynamics and mass transfer in a falling film wavy microchannel

Siyuan Chen; Tao Zhang; Li Lv; Yanxiao Chen; Shengwei Tang

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Simulation of the hydrodynamics and mass transfer in a falling film wavy microchannel

Catalysis, Kinetics and Reaction Engineering | Updated：2026-01-06

- Simulation of the hydrodynamics and mass transfer in a falling film wavy microchannel
- Chinese Journal of Chemical Engineering Vol. 34, Issue 6, Pages: 97-105(2021)
- Affiliations：
  
  Low-Carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University,Chengdu,China,610065
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2021
- Accepted：
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Siyuan Chen, Tao Zhang, Li Lv, Yanxiao Chen, Shengwei Tang. Simulation of the hydrodynamics and mass transfer in a falling film wavy microchannel[J]. Chinese Journal of Chemical Engineering, 2021, 34(6): 97-105.
DOI：

Siyuan Chen, Tao Zhang, Li Lv, Yanxiao Chen, Shengwei Tang. Simulation of the hydrodynamics and mass transfer in a falling film wavy microchannel[J]. Chinese Journal of Chemical Engineering, 2021, 34(6): 97-105. DOI：

摘要

Abstract

The flow in a liquid falling film is predominantly laminar

and the liquid-side mass transfer is limited by molecular diffusion. The effective way to enhance the mass transfer is to improve the liquid film flow behavior. The falling film behaviors of water

ethanol and ethylene glycol in nine different wavy microchannels were simulated by Computational Fluid Dynamics. The simulation results show that the falling film thickness exhibits a waveform distribution resulting in a resonance phenomenon along the wavy microchannel. The fluctuation of liquid film surface increases the gas–liquid interface area

and the internal eddy flow inside the liquid film also improves the turbulence of liquid film

the gas–liquid mass transfer in falling film microchannels is intensified. Compared with flat microchannel

the CO

absorption efficiency in water in the wavy microchannel is improved over 41%. Prediction models of liquid film amplitude and average liquid film thickness were established respectively.

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