Breaching flow slides result in a turbidity current running over and directly interacting with the eroding, submarine slope surface, thereby promoting further sediment erosion. The investigation and understanding of this current are crucial, as it is the main parameter influencing the failure evolution and fate of sediment during the breaching phenomenon. In contrast to previous numerical studies dealing with this specific type of turbidity currents, we present a 3D numerical model that simulates the flow structure and hydrodynamics of breaching-generated turbidity currents. The turbulent behavior in the model is captured by large eddy simulation (LES). We present a set of numerical simulations that reproduce particular, previously published experimental results. Through these simulations, we show the validity, applicability, and advantage of the proposed numerical model for the investigation of the flow characteristics. The principal characteristics of the turbidity current are reproduced well, apart from the layer thickness. We also propose a breaching erosion model and validate it using the same series of experimental data. Quite good agreement is observed between the experimental data and the computed erosion rates. The numerical results confirm that breaching-generated turbidity currents are self-accelerating and indicate that they evolve in a self-similar manner.

中文翻译：

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利用大涡模拟对突破产生的浊流进行建模

破坏性的滑流导致浑浊的水流流过侵蚀的海底斜坡表面并与之直接相互作用，从而进一步加剧了沉积物的侵蚀。对这一潮流的研究和理解至关重要，因为它是影响破裂现象期间沉积物破坏演化和命运的主要参数。与以前针对这种特定类型的浊流的数值研究相比，我们提出了一个3D数值模型，该模型模拟了突破产生的浊流的流动结构和流体动力学。模型中的湍流行为通过大涡模拟（LES）捕获。我们提供了一组数值模拟，可以重现以前发表的特定实验结果。通过这些模拟，我们证明了有效性，适用性，提出的数值模型用于研究流动特性的优势。除了层厚之外，还很好地再现了浊度电流的主要特性。我们还提出了一个破坏性侵蚀模型，并使用相同系列的实验数据对其进行了验证。在实验数据和计算的腐蚀速率之间观察到很好的一致性。数值结果证实了破坏产生的浊流是自加速的，并表明它们以自相似的方式演化。在实验数据和计算的腐蚀速率之间观察到很好的一致性。数值结果证实了破坏产生的浊流是自加速的，并表明它们以自相似的方式演化。在实验数据和计算的腐蚀速率之间观察到很好的一致性。数值结果证实了破坏产生的浊流是自加速的，并表明它们以自相似的方式演化。