Abstract Pseudo-slug flow is a subset of intermittent flow which has not been properly understood and modeled. However, this flow pattern is widely encountered in oil and gas production and transportation, driving the needs for proper modeling efforts. A new pseudo-slug unit cell model is proposed in this paper. The proposed model modifies the existing slug unit cell model by accounting the continuous gas passage, slippage, and interfacial momentum exchange in the pseudo-slug body. Pseudo-slug characteristics (length, velocity, and body holdup) reported in literature are incorporated through ad-hoc closure relationships. These closures remain to be improved in the future. Overall, the proposed model produces more accurate pressure gradient and film holdup (HLF) predictions compared to two state-of-the-art models which generally treat pseudo-slug as slug flow (TUFFP Unified model and OLGAS 7.3.5®).

中文翻译：

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管道内气液伪段塞流的晶胞模型

摘要 伪段塞流是尚未正确理解和建模的间歇流的一个子集。然而，这种流动模式在石油和天然气生产和运输中广泛遇到，推动了对适当建模工作的需求。本文提出了一种新的伪段塞晶胞模型。所提出的模型通过考虑伪段塞体内的连续气体通道、滑移和界面动量交换来修改现有的段塞晶胞模型。文献中报道的伪弹头特征（长度、速度和体滞留量）通过临时闭合关系合并。这些关闭在未来仍有待改进。全面的，