Abstract Geysers in dropshafts of stormsewer systems are consecutive eruptions of a mixture of gas and liquid that can attain heights of more than 30 m. The present study investigates the mechanisms and characteristics of these extreme events numerically using OpenFOAM toolbox. The numerical model is based on a compressible two-phase flow solver and was validated using laboratory tests that achieved large eruption heights. The results show that the aforementioned experimental geysers can be reasonably well simulated using two- and three-dimensional numerical models. Further studies are needed to verify the applicability of two-dimensional models for simulating geysers in actual stormsewer systems. Moreover, the results suggest that compressibility of air plays a critical role in the formation of geysers. Overall, the conducted numerical study provides insights into the characteristics of geyser eruptions and presents some criteria for performing efficient numerical simulations of these events.

中文翻译：

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垂直井中田间规模间歇泉的数值研究

摘要 雨水管道系统下水道中的间歇泉是气液混合物的连续喷发，高度可达 30 m 以上。本研究使用 OpenFOAM 工具箱以数值方式研究这些极端事件的机制和特征。该数值模型基于可压缩的两相流求解器，并使用实验室测试进行了验证，该测试实现了大喷发高度。结果表明，使用二维和三维数值模型可以很好地模拟上述实验间歇泉。需要进一步的研究来验证二维模型在模拟实际暴雨下水道系统中的间歇泉的适用性。此外，结果表明空气的可压缩性在间歇泉的形成中起着关键作用。全面的，