Turbulent gas flux measurements below the air-water interface of a grid-stirred tank

Ren Chu Chia Ren Chu, Gerhard H. Jirka

研究成果: 雜誌貢獻期刊論文同行評審

52 引文 斯高帕斯(Scopus)

摘要

Experiments have been conducted in an effort to elucidate the details of the interfacial gas transfer mechanism under liquid-side control. Near-surface liquid turbulence and oxygen concentration fluctuations have been measured in a laboratory grid-stirred tank for a range of turbulent Reynolds number RL from 80 to 660. Our observations show that the thickness of the gas boundary layer closely agrees in trend and magnitude with the Lewis-Whitman's film thickness as determined from the bulk concentration change. Furthermore, the functional dependence on turbulent Reynolds number is consistent with a large eddy domination. Additional simultaneous measurements of turbulent velocity and oxygen concentration fluctuations, including direct flux measurements, give further indication that the large scale eddy motions are more effective in the interfacial mass transfer process.

原文???core.languages.en_GB???
頁(從 - 到)1957-1968
頁數12
期刊International Journal of Heat and Mass Transfer
35
發行號8
DOIs
出版狀態已出版 - 8月 1992

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