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首页> 外文期刊>International Journal for Numerical Methods in Fluids >Numerical simulation of landslide impulsive waves by incompressible smoothed particle hydrodynamics
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Numerical simulation of landslide impulsive waves by incompressible smoothed particle hydrodynamics

机译：不可压缩平滑粒子流体动力学数值模拟滑坡冲击波

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摘要

An incompressible-smoothed particle hydrodynamics (I-SPH) formulation is presented to simulate impulsive waves generated by landslides. The governing equations, Navier-Stokes equations, are solved in a Lagrangian form using a two-step fractional method. Landslides in this paper are simulated by a submerged mass sliding along an inclined plane. During sliding, both rigid and deformable landslides mass are considered. The present numerical method is examined for a rigid wedge sliding into water along an inclined plane. In addition solitary wave generated by a heavy box falling inside water, known as Scott Russell wave generator, which is an example for simulating falling rock avalanche into artificial and natural reservoirs, is simulated and compared with experimental results. The numerical model is also validated for gravel mass sliding along an inclined plane. The sliding mass approximately behaves like a non-Newtonian fluid. A rheological model, implemented as a combination of the Bingham and the general Cross models, is utilized for simulation of the landslide behaviour. In order to match the experimental data with the computed wave profiles generated by deformable landslides, parameters of the rheological model are adjusted and the numerical model results effectively match the experimental results. The results prove the efficiency and applicability of the I-SPH method for simulation of these kinds of complex free surface problems.
机译：提出了一种不可压缩的光滑颗粒流体动力学（I-SPH）公式来模拟滑坡产生的脉冲波。控制方程Navier-Stokes方程使用两步分数法以拉格朗日形式求解。本文中的滑坡是通过沿倾斜平面滑动的淹没质量来模拟的。在滑动过程中，既要考虑刚性滑坡质量又要考虑变形滑坡质量。对于沿斜面滑入水中的刚性楔，研究了本数值方法。此外，还模拟了由沉入水中的沉重箱子所产生的孤波，即斯科特·罗素波发生器，该孤波是将掉落的岩石雪崩模拟到人工和天然油藏中的一个示例，并与实验结果进行了比较。数值模型也可以验证砾石沿斜面滑动的质量。滑动质量的行为近似于非牛顿流体。流变模型（由Bingham模型和通用Cross模型组合而成）用于模拟滑坡行为。为了使实验数据与由可变形滑坡产生的计算波廓线相匹配，调整流变模型的参数，数值模型结果与实验结果有效匹配。结果证明了I-SPH方法在模拟这些复杂的自由表面问题上的有效性和适用性。

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