Quantitative Analysis and Observation of the Convection near Gas-Liquid Interface

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Abstract By utilizing the method of Schlieren system,interfacial turbulence of convective structure in desorption of ethanol from water was observed and quantitatively analyzed.Horizontal unstable gas-liquid mass transfer experimental equipment was set up.The Marangoni interfacial convective structures caused by gas-liquid mass transfer in the interface during the desorption process of ethanol aqueous solution were observed.By employing the improved Schlieren,the concentration gradient of vicinity interface during gas-liquid mass transfer process was obtained. The quantitatively experimental result showed that the reason that induces the Marangoni convection is the local large surface tension gradient along the interface of the gas and liquid.This successfully explains the chaotic flow patterns obtained in gas-liquid mass transfer process accompanied by Marangoni effect and is helpful for the further study on the interfacial turbulence phenomena.

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Received 2008-07-15; published 2008-07-15

Cite this article:

LIU Chang-xu,ZENG Ai-wu,YU Guo-cong.Quantitative Analysis and Observation of the Convection near Gas-Liquid Interface[J] Chemcial Industry and Engineering, 2008,V25(4): 283-288

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