This study employs the large-eddy simulation (LES) method to investigate the interaction of submarine sediment flows with extensive shear behavior and ambient water. This method is validated with good accuracy by simulating the head velocity and evolution geometries of a submarine mud flow with non-Newtonian fluid characteristics and a submarine turbidity current with Newtonian fluid characteristics in inclined and regular lock-exchange flume experiments. This study finds that the violent mass transfer at the interface of the submarine sediment flow and seawater is caused by numerous eddies, which significantly alter the submarine sediment flow's geometry, resulting in varying degrees of undulation, including the deposition pattern of the submarine sediment flow tail. The acceleration zone, where the velocity of the submarine sediment flow increases significantly at this undulation, propels the sediment flow forward, supporting its long-distance transport. Furthermore, the turbulence and mass transport characteristics of submarine turbidity currents with low dynamic viscosity Newtonian fluid characteristics are stronger than those of submarine mud flows with high dynamic viscosity non-Newtonian fluid characteristics. Therefore, when submarine landslides develop into later stages, such as submarine turbidity currents with high velocity, large volume, and long run-out distance characteristics, more attention must be given to the mass transport process.

中文翻译：

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基于传质的 LES 建模方法，用于分析具有广泛剪切行为的海底沉积物流的运动

本研究采用大涡模拟（LES）方法来研究海底沉积物流与广泛剪切行为和环境水的相互作用。通过在倾斜和规则锁交换水槽实验中模拟具有非牛顿流体特性的海底泥浆流和具有牛顿流体特性的海底浊流的水头速度和演化几何形状，验证了该方法具有良好的准确性。研究发现，海底泥沙流与海水界面处的剧烈传质是由众多涡流引起的，这些漩涡显着改变了海底泥沙流的几何形状，导致海底泥沙流尾部的沉积模式等不同程度的波动。 。在加速区，海底泥沙流的速度在此波动处显着增加，推动泥沙流向前，支持其长距离输送。此外，具有低动力粘度牛顿流体特性的海底浊流的湍流和质量传递特性强于具有高动力粘度非牛顿流体特性的海底泥浆流。因此，当海底滑坡发展到后期，如具有速度快、体积大、跑动距离长等特点的海底浊流时，必须更加关注质量输送过程。