The presence downstream of a dam of either rigid or erodible obstacles may strongly affect the flood wave propagation, and this complex interaction may lead to further dramatic consequences on people and structures. The open-source Lagrangian-based DualSPHysics solver was used to simulate a three-dimensional dam-break in a closed domain including an oriented obstacle that deflects the flow, thus increasing the complexity of fluid dynamics. By comparing numerical results with experimental data, the effectiveness of the model was evaluated and demonstrated with an extensive sensitivity analysis based on several parameters crucial to the smoothed particle hydrodynamics method, such as the resolution, the boundary conditions, and the properties of the interaction weight function. Charts and summary tables highlight the most suitable conditions for simulating such occurrences in the DualSPHysics framework. The presence of the obstacle, being also an opportunity for observation and study of complex fluid dynamics, opens the way to investigate the fluid interaction with solid objects involved in dam-break events and, possibly, to predict their effect with respect to the relative position between them and the flood and other relevant parameters. Finally, the numerical model presents a good overall agreement.

中文翻译：

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使用 DualSPPhysics 对 3D 实验性大坝破坏波与尖锐障碍物相互作用的数值验证

坝下游存在的刚性或易蚀障碍物可能会强烈影响洪水波的传播，这种复杂的相互作用可能会对人和结构造成进一步的严重后果。开源的基于拉格朗日函数的 DualSPPhysics 求解器用于模拟封闭域中的三维溃坝，其中包括使流动偏转的定向障碍物，从而增加了流体动力学的复杂性。通过将数值结果与实验数据进行比较，基于对平滑粒子流体动力学方法至关重要的几个参数，例如分辨率、边界条件和相互作用权重的属性，通过广泛的敏感性分析来评估和证明模型的有效性功能。图表和汇总表突出显示了在 DualSPPhysics 框架中模拟此类事件的最合适条件。障碍物的存在，也是观察和研究复杂流体动力学的机会，为研究流体与溃坝事件中涉及的固体物体的相互作用开辟了道路，并可能预测它们对相对位置的影响它们与洪水和其他相关参数之间。最后，数值模型呈现出良好的整体一致性。根据它们与洪水和其他相关参数之间的相对位置来预测它们的影响。最后，数值模型呈现出良好的整体一致性。根据它们与洪水和其他相关参数之间的相对位置来预测它们的影响。最后，数值模型呈现出良好的整体一致性。