Impulsive Waves Generated by the Collapse of a Submerged Granular Column: A Three-Phase Flow Simulation with an Emphasis on the Effects of Initial Packing Condition
Impulsive Waves Generated by the Collapse of a Submerged Granular Column: A Three-Phase Flow Simulation with an Emphasis on the Effects of Initial Packing Condition
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水下颗粒柱崩溃产生的脉冲波：三相流模拟，重点关注初始填充条件的影响
DOI：
10.1142/s1793431118400018
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发表时间：
2018
影响因子：
1.5
通讯作者：
Huang, Zhenhua
中科院分区：
文献类型：
--
作者：
Yu, Ming-Lan;Lee, Cheng-Hsien;Huang, Zhenhua
海底滑坡是引发海啸的主要原因之一，但由于涉及复杂的动力学和缺乏观测数据，人们对它的了解较少。在本研究中，一个淹没颗粒柱的崩溃被用作一个理想化的海底滑坡模型。采用固-液-气三相连续介质模型，研究了初始填料对柱体坍塌过程及波的影响。数值模拟结果表明，初始填充对崩塌过程的持续时间和合成波的特性有重要影响。孔隙压力，速度场的流体相，滑动的颗粒质量的体积，和滑动速度的计算和使用来了解的初始包装条件的影响。研究结果表明，在海底滑坡及其产生的波浪的数值模拟中，考虑初始堆积效应是非常重要的。研究结果还表明，颗粒流运动前沿产生的大涡旋会影响滑坡波的形态。
Submarine landslides are one of the major causes of tsunamis but less understood due to complicated dynamics involved and the lack of observational data. In this study, the collapse of a submerged granular column is used as an idealized submarine landslide model. A three-phase (solid–liquid–gas) continuum model is used to study the effect of the column’s initial packing on the collapse process and the resultant waves. Numerical simulations reveal that the initial packing can have significant effect on the duration of the collapse process and the characteristics of the resultant waves. Pore pressure, velocity field of the fluid phase, the volume of the sliding granular mass, and the sliding velocity are calculated and used to understand the effects of initial packing condition. Our results show that it is important to consider the initial packing effects in numerical simulations of submarine landslides and the resultant waves. Our result also show that the large vortex generated by the moving front of the granular flow can affect the form of the waves generated by the landslide.
影响因子：
3.7
作者：
Liu, PLF;Wu, TR;Borrero, JC
通讯作者：
Borrero, JC