Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland.
Sensors (Basel). 2022 Apr 19;22(9):3126. doi: 10.3390/s22093126.
The multiphase splash phenomenon is especially interesting in the context of environmental protection, as it could be a mechanism for transporting various types of pollution. A numerical 3D multiphase transport model was applied to a splash that occurred under the impact of a petrol drop on the water surface. The splash phenomenon in immiscible liquids was simulated using the multiphaseInterFoam solver, i.e., a part of the OpenFOAM computational fluid dynamics software implementing the finite volume method (FVM) for space discretization. Thirteen variants with a variable drop size (3.00-3.60 mm) or drop velocity (3.29-3.44 m/s) were conducted and validated experimentally based on splash images taken by a high-speed camera (2800 fps). Based on the numerical simulation, it was possible to analyse aspects that were difficult or impossible to achieve experimentally due to the limitations of the image analysis method. The aspects included the cavity spread, the jet forming moment, and, notably, the scale of the petroleum contamination spread in the splash effect. The simulations showed that droplets detaching from the crown did not consist of pure water but were mostly a "mixture" of water and petrol or petrol alone. The applied modelling workflow is an efficient way to simulate three-phase splash phenomena.
多相飞溅现象在环境保护方面尤其有趣，因为它可能是一种运输各种类型污染的机制。应用数值 3D 多相输运模型模拟了在汽油滴撞击水面时发生的飞溅现象。使用多相 InterFoam 求解器模拟了不混溶液体的飞溅现象，即 OpenFOAM 计算流体动力学软件的一部分，它采用有限体积法（FVM）进行空间离散化。进行了十三个变体，改变了液滴尺寸（3.00-3.60 毫米）或液滴速度（3.29-3.44 米/秒），并基于高速相机（2800 fps）拍摄的飞溅图像进行了实验验证。基于数值模拟，可以分析由于图像分析方法的限制而难以或不可能在实验中实现的方面。这些方面包括空腔扩展、射流形成时刻，以及特别值得注意的是，飞溅效应中石油污染的扩展规模。模拟表明，从冠部脱离的液滴并非纯由水组成，而是主要由水和汽油或仅汽油组成的“混合物”。所应用的建模工作流程是模拟三相飞溅现象的有效方法。
