Abstract Multiphase flow, especially two-phase gas-liquid flow, is of great importance for a variety of applications and industrial processes, for example in the nuclear, chemical, or oil and gas industries. In this contribution, we present simulation results for gas-liquid slug flow in large horizontal pipes. Six test cases with different oil, water, and gas flow rates are considered, which cover a wide range of different slug flows. The numerical predictions are validated by comparison with experimental data obtained from video observations. The relative error of the mean liquid level between experiment and simulation is less than 12.3% for all but one test cases. Furthermore, a frequency analysis is performed. The single-sided amplitude spectrum as well as the smoothed power spectral density are calculated. For both, experimental and simulation data, one observes an increase of the dominant frequencies if the ratio of liquid and gas superficial velocity is increased.

中文翻译：

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大型水平管中两相段塞流的数值模拟、验证和分析

摘要 多相流，尤其是气液两相流，对于各种应用和工业过程非常重要，例如在核工业、化学工业或石油和天然气工业中。在这篇文章中，我们展示了大型水平管道中气液段塞流的模拟结果。考虑了具有不同油、水和气流量的六个测试案例，涵盖了广泛的不同段塞流。通过与从视频观察中获得的实验数据进行比较来验证数值预测。除了一个测试用例外，所有实验和模拟之间平均液位的相对误差都小于 12.3%。此外，执行频率分析。计算单边幅度谱以及平滑的功率谱密度。对彼此而言，