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Weakly compressible SPH simulation of cnoidal waves with strong plunging breakers

机译：强力下降器对正弦波的弱压缩SPH模拟

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摘要

Hydrodynamics of highly nonlinear cnoidal waves and their subsequent strong plunging breakers are among the least understood and most significant issues in coastal engineering. In this work, a weakly compressible smoothed particle hydrodynamics (SPH) formulation is used for the study of the generation and propagation of cnoidal waves and investigation of the characteristics of the induced strong plunging breakers. Numerical results show the capability of the SPH scheme for properly simulating the cnoidal waves. For the case of strong plunging breakers, dynamic and kinematic features of the flow are computed and compared with certain implementations of other numerical techniques. SPH is shown to be more accurate compared with other numerical techniques. Power spectral density of both horizontal and vertical dynamic velocities at still water level demonstrates existing of 2D isotropy of dynamics for a typical beach profile with cross-section of slowly varying bottom.
机译：在海岸工程中，高度非线性的弦波及其随后的强力破碎锤的流体动力学是最不被理解和最重要的问题。在这项工作中，使用弱可压缩的光滑粒子流体动力学（SPH）公式来研究椭球波的产生和传播，以及研究诱发的强冲破壁器的特性。数值结果表明，SPH方案能够正确模拟正弦波。对于强力下降的断路器，将计算流动的动态和运动学特征，并将其与其他数值技术的某些实现方式进行比较。与其他数值技术相比，SPH被证明更加准确。静止水位处水平和垂直动态速度的功率谱密度表明，对于底部横截面缓慢变化的典型海滩剖面，存在二维的动力学各向同性。

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