Numerical Simulation of 3D Flow and Topography Change in Harbor Caused by Tsunami
Numerical Simulation of 3D Flow and Topography Change in Harbor Caused by Tsunami
复制标题
海啸引起的港口三维流动和地形变化的数值模拟
DOI：
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
M. Kuroiwa
中科院分区：
文献类型：
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作者：
Y. Kajikawa;M. Kuroiwa
海啸引起的港口地形变化对港口功能造成严重破坏。为了更准确地预报地形变化，提出了一个非静力三维水流和地形变化模型。在该模型中，三维雷诺平均Navier-Stokes（RANS）方程的笛卡尔坐标系下的流动和线性k-e湍流模型的涡粘性系数的评估。在地形变化模型中，考虑了推移质和悬移质输移。在控制方程中引入了能够在复杂边界上平滑施加边界条件的分数面积/体积障碍表示法（FAVOR），并采用五阶加权基本无振荡（韦诺）格式离散控制方程的对流项。为了验证该模型的有效性，将其应用于港口模型的大尺度试验。模拟结果与试验结果的对比表明，该模型能够较准确地模拟港周地形变化，尤其是港中心泥沙淤积和防波堤附近的冲刷。
Topography change in a harbor caused by tsunami affects serious damage to the harbor functions. In this paper, a non-hydrostatic three-dimensional (3D) flow and topography change model was proposed in order to predict the topography change with high accuracy. In the proposed model, the 3D Reynolds-Averaged Navier-Stokes (RANS) equations on the Cartesian coordinate system was used for flow and the linear k-e turbulence model was adopted for the evaluation of the eddy viscosity coefficient. In the topography change model, bed-load and suspended-load transport were considered. Moreover, the Fractional Area/Volume Obstacle Representation (FAVOR) method, which has the ability to impose boundary conditions smoothly at complex boundaries, was introduced into the governing equations, and the fifth-order Weighted Essentially Non-Oscillatory (WENO) scheme was applied to discretize advection terms of the governing equations. In order to verify the validity of the proposed model, it was applied to a large-scale experiment with a scale model of harbor. Comparisons between the simulated results and experimental ones proved that the model was able to reproduce the topography change around the harbor with sufficient accuracy, especially the sediment deposition in the center of the harbor and the scouring near the breakwaters.
影响因子：
4.7
作者：
S. Funke;C. Pain;S. Kramer;M. Piggott
通讯作者：
S. Funke;C. Pain;S. Kramer;M. Piggott