The present work aims to assess whether a standard numerical simulation (RANS-VOF model with k − ϵ closure) can adequately model experimental measurements obtained in a dam physical model. The investigation is carried out on the Sa Stria Dam, a roller compacted concrete gravity dam currently under construction in Southern Sardinia (Italy). The original project, for which a physical model was simulated, included a downstream secondary dam. However, due to both economic and technical reasons, the secondary dam may not be built. Hence, it is important to assess the flood discharge routing and energy dissipation in the modified plan. Numerical validation is performed adopting the same laboratory configuration, in presence of the downstream dam, and results show a good agreement with mean experimental variables (i.e., pressure, water level). An alternative configuration without the downstream dam is here numerically tested to understand the conditions of flood discharge and assess whether its results can give relevant information for the design of mitigation measures. The topic is of interest also from a more general perspective. Indeed, the feasibility to integrate numerical models with existing laboratory measurements can be very useful not only for new constructions but also for existing dams, which may need either maintenance or upgrading works, such as in case of flood discharge increment.

中文翻译：

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标准 VOF 数值模拟能否在操作环境中充分完成溢洪道实验室测量？萨斯特里亚大坝案例

目前的工作旨在评估标准数值模拟（具有 k - ϵ 闭包的 RANS-VOF 模型）是否可以充分模拟在大坝物理模型中获得的实验测量值。调查是在萨斯特里亚大坝上进行的，这是一座目前在撒丁岛南部（意大利）建造的碾压混凝土重力坝。模拟物理模型的原始项目包括下游二级大坝。但由于经济和技术两方面的原因，二级大坝可能不会建成。因此，在修改后的计划中评估泄洪路径和能量耗散是很重要的。在下游大坝存在的情况下，采用相同的实验室配置进行数值验证，结果显示与平均实验变量（即压力、水位）非常吻合。这里对没有下游大坝的替代配置进行了数值测试，以了解泄洪条件并评估其结果是否可以为缓解措施的设计提供相关信息。从更一般的角度来看，该主题也很有趣。事实上，将数值模型与现有实验室测量相结合的可行性不仅对新建筑非常有用，而且对现有大坝也非常有用，这些大坝可能需要维护或升级工作，例如在洪水流量增加的情况下。