Prediction of Main Regime Transition with Variations of Gas and Liquid Phases in a Bubble Column.

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

SUBMITTER: Im H 

PROVIDER: S-EPMC6648151 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature