Rayleigh对流的PIV实验观测及其对传质的影响（英文）

The velocity distribution in Rayleigh convection caused by acetone volatilization in acetone-ethyl acetate binary system was observed in a vertical cross section of an initially quiescent liquid layer by utilizing particle image velocimetry. Obvious turbulent vortexes that were induced by Rayleigh c...

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Bibliographic Details
Published in中国化学工程学报：英文版 no. 10; pp. 1078 - 1086
Main Author 陈炜 陈淑勇 袁希钢 张会书 刘伯潭 余国琮
Format Journal Article
LanguageEnglish
Published 2014
Subjects
coefficient
convection
Enhancement
Mass
Particle
Rayleigh
transfer
velocimetry
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ISSN1004-9541
2210-321X

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Summary:The velocity distribution in Rayleigh convection caused by acetone volatilization in acetone-ethyl acetate binary system was observed in a vertical cross section of an initially quiescent liquid layer by utilizing particle image velocimetry. Obvious turbulent vortexes that were induced by Rayleigh convection appeared in the bulk liquid,and its statistic features indicated that Rayleigh convection became more intense with the increase of Ra number and ReGnumber. Mass transfer coefficient was measured and the computed enhancement factor indicated that Rayleigh convection could promote the surface renewal of the liquid phase and intensify the interfacial mass transfer significantly. A method was proposed for the prediction of mass transfer coefficient based on the measured velocity vector, and the predicted mass transfer coefficients are in reasonable agreement with the experimental results.
Bibliography:Wei Chen;Shuyong Chen;Xigang Yuan;Huishu Zhang;Botan Liu;Kuotsung Yu;State Key Laboratory of Chemical Engineering and School of Chemical Engineering and Technology, Tianjin University
11-3270/TQ
ISSN:1004-9541
2210-321X