A wide range of natural and industrial processes, such as a droplet falling in the ocean as well as the injection of fuel in an internal combustion engine, are physically explained by the study of multiphase flows. The understanding of these processes is a fundamental step in order to optimize their use in industrial applications. Computational tools have been increasingly used for that purpose. This paper concerns the simulation of a water droplet of 2.9 mm diameter impacting onto a water pool with two different free falling velocities, 1.55 m/s and 2.5 m/s. The simulations were run using the Volume of Fluid method, which captures the interface between two fluids by solving a transport equation for the volume fraction. As demonstrated in many previous investigations, the solution of this phase transport equation is far from trivial. Therefore, in order to better understand the influence of the scheme for the advection term of the VoF transport equation, two different schemes are used, namely HRIC and PLIC. The CFD software Convergent Science Inc.’s CONVERGE ${}^{TM}$ CFD, which adopts adaptive mesh refinement techniques (AMR), is used to carry out the simulations. The results are then compared to experimental data. It is concluded that the VoF method with both schemes is able to track the surface between the fluids with good accuracy. Furthermore, the PLIC scheme maintains a sharper interface than the HRIC scheme as well as is more accurate and computationally efficient than the HRIC. These observations can be extended to other two-phase flow simulations.

多相流的研究从物理上解释了各种各样的自然和工业过程，例如落在海洋中的水滴以及内燃机中的燃料喷射。对这些过程的了解是优化其在工业应用中的使用的基本步骤。为此，越来越多地使用计算工具。本文涉及模拟直径为2.9 mm的水滴撞击到具有两个不同的自由下降速度1.55 m / s和2.5 m / s的水池上的过程。仿真是使用“流体体积”方法进行的，该方法通过求解体积分数的输运方程来捕获两种流体之间的界面。正如许多先前的研究所证明的，该相输运方程的解远非平凡。因此，为了更好地理解该方案对VoF输运方程对流项的影响，使用了两种不同的方案，即HRIC和PLIC。CFD软件Convergent Science Inc.的CONVERGE${}^{Ť\mathrm{中号}}$使用自适应网格细化技术（AMR）的CFD进行仿真。然后将结果与实验数据进行比较。可以得出结论，两种方案的VoF方法都能够以良好的精度跟踪流体之间的表面。此外，PLIC方案比HRIC方案保持更清晰的界面，并且比HRIC更加准确和计算效率高。这些观察结果可以扩展到其他两相流模拟。