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Two- and three-dimensional multiphase mesh-free particle modeling of transitional landslide with μ(I) rheology
International Journal for Numerical Methods in Fluids ( IF 1.7 ) Pub Date : 2024-02-12 , DOI: 10.1002/fld.5274 Ehsan Jafari Nodoushan 1 , Mohanna Tajnesaie 2 , Ahmad Shakibaeinia 3
International Journal for Numerical Methods in Fluids ( IF 1.7 ) Pub Date : 2024-02-12 , DOI: 10.1002/fld.5274 Ehsan Jafari Nodoushan 1 , Mohanna Tajnesaie 2 , Ahmad Shakibaeinia 3
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Landslides, which are the sources of most catastrophic natural disasters, can be subaerial (dry), submerged (underwater), or semi-submerged (transitional). Semi-submerged or transitional landslides occur when a subaerial landslide enters water and turns to submerged condition. Predicting the behavior of such a highly dynamic multi-phase granular flow system is challenging, mainly due to the water entry effects, such as wave impact and partial saturation (and resulted cohesion). The mesh-free particle methods, such as the moving particle semi-implicit (MPS) method, have proven their capabilities for the simulation of the highly dynamic multiphase systems. This study develops and evaluates a numerical model, based on the MPS particle method in combination with the μ(I) rheological model, to simulate the morphodynamic of the granular mass in semi-submerged landslides in two and three dimensions. An algorithm is developed to consider partial saturation (and resulting cohesion) during the water entry. Comparing the numerical results with the experimental measurements shows the ability of the proposed model to accurately reproduce the morphological evolution of the granular mass, especially at the moment of water entry.
中文翻译：
利用 μ(I) 流变学对过渡性滑坡进行二维和三维多相无网格颗粒建模
山体滑坡是大多数灾难性自然灾害的根源，可以是地面（干燥）、水下（水下）或半水下（过渡性）。当地面滑坡进入水中并转变为水下状态时，就会发生半淹没或过渡性滑坡。预测这种高度动态的多相颗粒流系统的行为具有挑战性，这主要是由于水的进入效应，例如波浪冲击和部分饱和（以及由此产生的内聚力）。无网格粒子方法，例如移动粒子半隐式（MPS）方法，已经证明了其模拟高动态多相系统的能力。本研究开发并评估了基于 MPS 粒子法并结合 μ ( I )流变模型的数值模型，以二维和三维模拟半淹没滑坡中颗粒体的形态动力学。开发了一种算法来考虑进水期间的部分饱和（以及由此产生的内聚力）。将数值结果与实验测量结果进行比较，表明所提出的模型能够准确再现颗粒体的形态演化，特别是在入水时。
更新日期：2024-02-12
中文翻译：
利用 μ(I) 流变学对过渡性滑坡进行二维和三维多相无网格颗粒建模
山体滑坡是大多数灾难性自然灾害的根源，可以是地面（干燥）、水下（水下）或半水下（过渡性）。当地面滑坡进入水中并转变为水下状态时，就会发生半淹没或过渡性滑坡。预测这种高度动态的多相颗粒流系统的行为具有挑战性，这主要是由于水的进入效应，例如波浪冲击和部分饱和（以及由此产生的内聚力）。无网格粒子方法，例如移动粒子半隐式（MPS）方法，已经证明了其模拟高动态多相系统的能力。本研究开发并评估了基于 MPS 粒子法并结合 μ ( I )流变模型的数值模型，以二维和三维模拟半淹没滑坡中颗粒体的形态动力学。开发了一种算法来考虑进水期间的部分饱和（以及由此产生的内聚力）。将数值结果与实验测量结果进行比较，表明所提出的模型能够准确再现颗粒体的形态演化，特别是在入水时。
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