A new methodology for performing large scale simulations of tsunami generated by deformable submarine slides
A new methodology for performing large scale simulations of tsunami generated by deformable submarine slides
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一种对可变形海底滑梯产生的海啸进行大规模模拟的新方法
DOI：
10.1016/j.ocemod.2020.101674
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发表时间：
2020
期刊：
影响因子：
3.2
通讯作者：
Smith R
中科院分区：
文献类型：
--
作者：
Smith R
海底滑坡可能会引发大型海啸，但这些事件在人类时间尺度上很少见，而且难以观察。实验和数值模拟提供了了解波浪产生机制以及潜在危险的方法。然而，为了充分捕获海底滑坡产生的复杂波形，还必须对滑坡动力学进行精确建模。在模拟三维海底滑坡的同时模拟海洋规模的海啸在计算上是困难的。过去的研究要么将滑动生成的局部模型与海洋规模的海啸模拟相结合，要么简化了滑动动力学。在这里，我们提出了一种新的模型耦合方法，该方法通过二维动态滑动模拟的边界条件耦合在海洋尺度模型中生成波浪。我们通过将模型结果与先前对墨西哥湾海啸滑坡的模拟进行比较来验证我们的耦合方法。然后，我们研究了滑坡变形对英国周围假设的海底滑坡所造成的风险的影响。我们表明，由于滑动的加速度和速度的细节，可变形海底滑动模拟产生比固体滑动模拟更大的波浪，尽管没有对横向扩散进行建模。这项工作提供了一种新的方法，使用二维多材料模拟的输出作为三维海洋模型的输入来模拟海底滑坡引起的海洋规模海啸。这有助于未来对海啸海底滑坡造成的海啸风险进行探索，这些滑坡会影响通常不易发生海啸的海岸线。
Large tsunamis can be generated by submarine slides, but these events are rare on human timescales and challenging to observe. Experiments and numerical modelling offer methods to understand the mechanisms by which they generate waves and what the potential hazard might be. However, to fully capture the complex waveform generated by a submarine slide, the slide dynamics must also be accurately modelled. It is computationally difficult to model both a three-dimensional submarine slide whilst simultaneously simulating oceanic-scale tsunamis. Past studies have either coupled localised models of the slide generation to oceanic-scale tsunami simulations or simplified the slide dynamics. Here, we present a new methodology of model coupling that generates the wave in the ocean-scale model via boundary-condition coupling of a two-dimensional dynamic slide simulation. We verify our coupling methodology by comparing model results to a previous simulation of a tsunamigenic slide in the Gulf of Mexico. We then examine the effect of slide deformation on the risk posed by hypothetical submarine slides around the UK. We show the deformable submarine slide simulations produce larger waves than the solid slide simulations due to the details of acceleration and velocity of the slide, although lateral spreading is not modelled. This work offers a new methodology for simulating oceanic-scale tsunamis caused by submarine slides using the output of a two-dimensional, multi-material simulation as input into a three-dimensional ocean model. This facilitates future exploration of the tsunami risk posed by tsunamigenic submarine slides that affect coastlines not normally prone to tsunamis.
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影响因子：
2
作者：
R. Thomson;A. Rabinovich;E. Kulikov;I. Fine;B. Bornhold
通讯作者：
R. Thomson;A. Rabinovich;E. Kulikov;I. Fine;B. Bornhold
影响因子：
3.2
作者：
H. Hiester;M. Piggott;P. Allison
通讯作者：
H. Hiester;M. Piggott;P. Allison
DOI：
10.1061/(asce)0733-950x(1998)124:3(127
发表时间：
1998-05
期刊：
Journal of Waterway Port Coastal and Ocean Engineering-asce
影响因子：
--
作者：
P. Watts
通讯作者：
P. Watts
DOI：
10.1017/cbo9780511740367.011
发表时间：
2012
期刊：
--
影响因子：
--
作者：
B. Bornhold;R. Thomson
通讯作者：
B. Bornhold;R. Thomson
DOI：
10.7907/s3nh-ra23
发表时间：
1997
期刊：
--
影响因子：
--
作者：
P. Watts
通讯作者：
P. Watts