Abstract This is a numerical study of transition simulation of two-phase intermittent slug flow characteristics in oil and gas pipelines using CFD analysis. The two-fluid free pressure model is employed to solve problem. Moreover, Riemann algorithm has been used to discretize the governing equations. The time history of slug flow initiation, intermittent slug flow repetition and slug flow development have been investigated in this study. The obtained results revealed that as time goes by the slug regime begins and grows and as the slug flow regime grows, it moves forward. Furthermore, it is concluded that when the first slug flow regime begins to grow and develop the second slug flow regime has been formed. Ultimately, it is found that as the first slug grows, the second slug is on the verge of growth.

中文翻译：

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油气管道两相间歇段塞流特性过渡模拟

摘要 本论文是对油气管道两相间歇段塞流特性过渡模拟的CFD分析数值研究。采用二流体自由压力模型解决问题。此外，黎曼算法已被用于离散化控制方程。本研究研究了段塞流起始、间歇段塞流重复和段塞流发展的时间历程。获得的结果表明，随着时间的推移，段塞流态开始并增长，随着段塞流态的增长，它向前移动。此外，得出的结论是，当第一个段塞流状态开始增长和发展时，第二个段塞流状态已经形成。最终，发现随着第一个 slug 的增长，第二个 slug 处于增长的边缘。