Simultaneous PIV/LIF measurements of interfacial convection during CO2 dissolution in water and prediction of mass transfer coefficient

FU Qiang1 ZHANG Huishu1 HU Nan1 YUAN Xigang1 YU Kuotsung1

(1.State Key Laboratory of Chemical Engineering, School of Engineering and Technology, Tianjin University, Tianjin, China 300072)

【Abstract】The liquid phase velocity fields and concentration distributions in an interfacial Rayleigh convection process during CO2 dissolution in water were simultaneously measured by combining particle image velocimetry (PIV) and laser induced fluorescence (LIF) technique. The evolution of Rayleigh convection was investigated quantitatively. Through the analysis of the mass transfer in the interfacial convection process, it is found that the vorticity is a major factor affecting the liquid mass transfer coefficient for the Rayleigh convection process. The relationship between the vorticity and the mass transfer coefficient was obtained, and a correlation was established. An effective method to predict liquid mass transfer coefficient by measuring velocity fields was established for the processes with Rayleigh convection.

【Keywords】 interface; mass transfer; carbon dioxide; Rayleigh convection; laser induced fluorescence; particle image velocimetry;

【DOI】

【Funds】 National Natural Science Foundation of China (91434204)

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(Translated by Song K)

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This Article

ISSN:0438-1157

CN: 11-1946/TQ

Vol 69, No. 02, Pages 586-594+886

February 2018

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Article Outline

Abstract

  • Introduction
  • 1 Experimental principle and methods
  • 2 PIV/LIF image processing
  • 3 Results and discussion
  • 4 Conclusions
  • Symbol description
  • References