Plunging solitary wave and its interaction with a slender cylinder on a sloping beach
Plunging solitary wave and its interaction with a slender cylinder on a sloping beach
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DOI：
10.1016/j.oceaneng.2013.09.011
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发表时间：
2013-12
影响因子：
5
通讯作者：
Weihua Mo;A. Jensen;P. Liu;P. Liu
中科院分区：
文献类型：
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作者：
Weihua Mo;A. Jensen;P. Liu;P. Liu
对孤立波在恒定坡度上的破碎进行了实验研究。在第二组实验中，在斜坡上安装了一个垂直圆柱体，受到浅水孤立波的冲击。PIV被用来记录自由表面高程的时间历史，以及两个视场(FOV)中的时间和空间速度变化。利用数值模型对三维波浪-结构相互作用问题进行了模拟。对滤波后的N-S方程进行了数值求解。小尺度涡旋用传统的Smagorinsky大涡模式和RNG大涡模式模拟。进行了数据模型比较。该协议对于破裂发生前的自由表面高程是非常有利的。实验室的海浪似乎比数值模拟的海浪稍早破裂。两个FOV的归一化水柱水平速度剖面的比较显示出很好的一致性。然而，数值波的深度平均水平速度的量级大约比实验室波高10-15%。数值模型用来描述孤立波在圆柱体上的爬升过程。还计算了波浪力的时程，并将其与自由面演化进行了关联。
Laboratory experiments were performed for solitary waves breaking on a constant slope. In the second set of experiments a vertical cylinder was installed on the slope, which was subject to the impact of a shoaling solitary wave. PIV was used to record the time history of free surface elevations, and temporal and spatial velocity variations in two fields of view (FOVs). A numerical model was also employed to simulate the three-dimensional wave–structure interaction problem. Filtered Navier–Stokes equations are solved numerically. The small scale eddies were modeled by the traditional Smagorinsky LES model and RNG LES model. The data-model comparisons were performed. The agreement is very good for the free surface elevations before breaking occurs. The laboratory wave appears to break slightly sooner than the numerically simulated wave. The comparisons for the normalized horizontal velocity profiles in the water column in both FOVs show excellent agreement. However, the magnitude of depth-averaged horizontal velocities for the numerical wave is roughly 10–15% higher than that of laboratory wave. The numerical model is used to illustrate the runup process of the solitary wave on the cylinder. The time history of wave force is also calculated and correlated to the free surface evolution.