Mathematical Modeling and Simulation for Marangoni Convection by Surfactants in Liquid Falling Film
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概要
- 論文の詳細を見る
In an absorption refrigeration system, it is well known that water vapor absorption into lithium bromide (LiBr) aqueous solution is enhanced by the addition of surfactants. Marangoni convection plays a role but its mechanism has not clearly been understood yet. In the present study, a relation between heat and mass transfer and Marangoni convection was investigated using mathematical modeling and numerical simulation in a falling film type absorber. We used an advanced Marangoni convection model that is able to predict velocity, temperature and mass fraction distribution in a falling film type absorber. Firstly, the effect of Marangoni convection on heat and mass transfer in an absorber was examined. As a result, efficiency of heat and mass transfer was increased due to Marangoni convection. Secondly, analysis for the effects of different operating conditions on an onset of Marangoni convection was carried out. The Marangoni number for the onset of convection decreased as the initial temperature and initial water mass fraction of solution decreased.
- 社団法人 化学工学会の論文
- 2003-03-01
著者
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Kim Sung
Department of Bioengineering and Technology, College of Engineering, Kangwon National University
-
Lee Chan
Department Of Chemical Engineering Korea University
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Lee Chan
Department Of Chemical And Biological Engineering Korea University
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Kim Sung
Department Of Anatomy
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Ha Jong
Department Of Chemical Engineering Korea University
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Kim Sung
Department Of Chemical Engineering Korea University
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Chun Byung-hee
Department Of Chemical And Biological Engineering Korea University
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Chun Byung-hee
Department Of Chemical Engineering Korea University
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Yoon Hyung
Korea Institute Of Energy Research
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Kim Sung
Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University, Yongin, Gyeonggi 446-701, Republic of Korea
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