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- W2909709150 abstract "Industrial bubble columns mainly operate in a heterogeneous flow regime and identifying transition from homogeneous to heterogeneous flow is important. This work addresses the determination of flow regimes with gas–liquid systems in a bubble column. Various parameters of gas holdup, volumetric mass transfer coefficient, drift flux, and pressure standard deviations were investigated to precisely determine the superficial gas velocity at the transition regime. For a column aspect ratio (H/D: static liquid height to column diameter ratio) of 2.5 to 5, the transitional superficial gas velocity generally became higher with lower liquid height. However, the reverse trend was observed with a low density gas system due to the difference in force balance acting around the bubble. The weak body force and drag force in a lower axial position interrupted the mass transfer process. The experimental results showed similar ranges of the transitional superficial gas velocity regardless of the choice of parameter for detecting it. Because there is no precise correlation about transition regime properties, we proposed new correlations to predict both transition regime superficial gas velocity and gas holdup by taking the intersection of the two regimes. The correlations precisely captured the transition regime properties within 15% deviations even in gas–liquid systems that are not tested in this work." @default.
- W2909709150 created "2019-01-25" @default.
- W2909709150 creator A5009129798 @default.
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- W2909709150 date "2019-01-16" @default.
- W2909709150 modified "2023-09-30" @default.
- W2909709150 title "Prediction of Main Regime Transition with Variations of Gas and Liquid Phases in a Bubble Column" @default.
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- W2909709150 doi "https://doi.org/10.1021/acsomega.8b02657" @default.
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