We quantify the ability of the two‐fluid Euler–Euler model to predict the overall gas hold‐up during two‐phase flow in vertical columns using a combination of experiments and simulations. Gas hold‐up in a bubble column and gas hold‐up in the less‐frequently studied co‐current flow are investigated. For homogeneous flow characterized by nearly uniform bubble size, Euler–Euler model predictions are within 10% of the experimental values for both modes of operation, if the bubble diameter supplied as input to the model is the average bubble diameter in the physical system. This also holds true for heterogeneous flow in bubble columns despite the presence of a broad distribution of bubble sizes, if turbulence and bubble swarm effects on momentum exchange between phases are properly accounted for. Swarm corrections adequate for bubble columns, are less successful for co‐current heterogeneous flow, for which gas hold‐up predictions are least accurate (average error of 22%).

中文翻译：

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使用Euler-Euler模型预测两相流系统中的气体滞留量

我们结合实验和模拟，量化了两流体Euler-Euler模型预测垂直塔两相流期间总气体滞留量的能力。研究了鼓泡塔中的气体滞留量和较少研究的并流中的气体滞留量。对于以几乎均一的气泡大小为特征的均匀流动，如果作为模型输入的气泡直径是物理系统中的平均气泡直径，则两种操作模式的Euler–Euler模型预测值均在实验值的10％以内。即使适当地考虑了湍流和气泡群对相之间动量交换的影响，尽管气泡尺寸分布广泛，对于气泡塔中的非均质流动也是如此。适用于气泡柱的群集校正，