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首页> 美国卫生研究院文献>Proceedings. Mathematical Physical and Engineering Sciences >Landslides and tsunamis predicted by incompressible smoothed particle hydrodynamics (SPH) with application to the 1958 Lituya Bay event and idealized experiment
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Landslides and tsunamis predicted by incompressible smoothed particle hydrodynamics (SPH) with application to the 1958 Lituya Bay event and idealized experiment

机译：用不可压缩的平滑粒子流体动力学（SPH）预测滑坡和海啸及其在1958年利图亚湾事件中的应用和理想化实验

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摘要

Tsunamis caused by landslides may result in significant destruction of the surroundings with both societal and industrial impact. The 1958 Lituya Bay landslide and tsunami is a recent and well-documented terrestrial landslide generating a tsunami with a run-up of 524 m. Although recent computational techniques have shown good performance in the estimation of the run-up height, they fail to capture all the physical processes, in particular, the landslide-entry profile and interaction with the water. Smoothed particle hydrodynamics (SPH) is a versatile numerical technique for describing free-surface and multi-phase flows, particularly those that exhibit highly nonlinear deformation in landslide-generated tsunamis. In the current work, the novel multi-phase incompressible SPH method with shifting is applied to the Lituya Bay tsunami and landslide and is the first methodology able to reproduce realistically both the run-up and landslide-entry as documented in a benchmark experiment. The method is the first paper to develop a realistic implementation of the physics that in addition to the non-Newtonian rheology of the landslide includes turbulence in the water phase and soil saturation. Sensitivity to the experimental initial conditions is also considered. This work demonstrates the ability of the proposed method in modelling challenging environmental multi-phase, non-Newtonian and turbulent flows.
机译：由山体滑坡引起的海啸可能会严重破坏周围的环境，并产生社会和工业影响。 1958年的利图亚湾滑坡和海啸是最近发生并有据可查的陆地滑坡，产生了524 m的海啸。尽管最近的计算技术在估算上升高度方面表现出了良好的性能，但它们无法捕获所有物理过程，特别是滑坡进入剖面和与水的相互作用。平滑粒子流体动力学（SPH）是一种用于描述自由表面和多相流的通用数值技术，尤其是那些在滑坡产生的海啸中表现出高度非线性变形的流。在当前的工作中，新颖的带位移的多相不可压缩SPH方法被应用于利图亚湾海啸和滑坡，并且是第一个能够真实再现基准试验中记载的滑坡和滑坡进入的方法。该方法是第一篇提出了物理学上实际应用的论文，该论文除了滑坡的非牛顿流变学之外，还包括水相湍流和土壤饱和度。还考虑了对实验初始条件的敏感性。这项工作证明了所提出方法在建模具有挑战性的环境多相，非牛顿和湍流中的能力。

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