Abstract Transient gas-liquid flow dynamics in partially aerated square cross-sectioned bubble columns were studied using an Eulerian–Eulerian based large eddy simulation approach. The numerical model was validated with the interfacial closures evaluated for drag, lift and virtual mass forces. The simulation data showed good agreement with both numerical predictions and experimental measurements in the literature. The current model was also shown to be able to predict the global gas holdup in the bubble column up to a very high value. Further simulations were performed to study the influences of initial liquid phase height to width ratio and inlet area to column cross-sectional area ratio on the global gas holdup in the bubble column. The numerical results indicated that the global gas holdup increases linearly with the superficial gas velocity. Thus, an empirical multivariate regression model was proposed to predict the global gas holdup with an adjusted R-square value of 0.99.

中文翻译：

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使用 EE-LES 耦合模型预测部分充气气泡塔中的气体持率

摘要 使用基于欧拉-欧拉的大涡模拟方法研究了部分充气方形截面气泡塔中的瞬态气液流动动力学。通过对阻力、升力和虚拟质量力评估的界面闭合来验证数值模型。模拟数据与文献中的数值预测和实验测量结果非常吻合。目前的模型也被证明能够预测气泡塔中的全球气体滞留量，达到非常高的值。进行了进一步的模拟以研究初始液相高宽比和入口面积与塔横截面面积比对鼓泡塔中整体气体保持率的影响。数值结果表明，全球含气量随表观气速呈线性增加。