Numerical study of solitary wave attenuation in a fragmented ice sheet
Numerical study of solitary wave attenuation in a fragmented ice sheet
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DOI：
10.1103/physrevfluids.2.034002
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发表时间：
2017-03-27
影响因子：
2.7
通讯作者：
Parau, Emilian I.
中科院分区：
文献类型：
--
作者：
Guyenne, Philippe;Parau, Emilian I.
提出了一种直接相位分辨数值模拟非线性海浪在破碎海冰中传播的模式。考虑的是波在边缘冰区的传播和衰减的应用。该模型求解了非线性势流方程和冰盖非线性薄板方程。一个关键的贡献是模拟破碎的海冰，这是通过允许弯曲刚度系数在空间上变化，使浮冰的分布可以直接指定在物理域。二维模拟研究孤立波通过不规则浮冰阵列的散射衰减。两种不同的措施的基础上的波剖面被用来量化其衰减随着时间的推移，为各种絮凝体配置。慢（近线性）或快（指数状）衰减观察到的入射波高，冰浓度，冰碎片等参数。
A numerical model for direct phase-resolved simulation of nonlinear ocean waves propagating through fragmented sea ice is proposed. In view are applications to wave propagation and attenuation across the marginal ice zone. This model solves the full equations for nonlinear potential flow coupled with a nonlinear thin-plate formulation for the ice cover. A key contribution is to modeling fragmented sea ice, which is accomplished by allowing the coefficient of flexural rigidity to vary spatially so that distributions of ice floes can be directly specified in the physical domain. Two-dimensional simulations are performed to examine the attenuation of solitary waves by scattering through an irregular array of ice floes. Two different measures based on the wave profile are used to quantify its attenuation over time for various floe configurations. Slow (near linear) or fast (exponential-like) decay is observed depending on such parameters as incident wave height, ice concentration, and ice fragmentation.