Wave Propagation Studies in Numerical Wave Tanks with Weakly Compressible Smoothed Particle Hydrodynamics
Wave Propagation Studies in Numerical Wave Tanks with Weakly Compressible Smoothed Particle Hydrodynamics
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DOI：
10.3390/jmse9020233
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发表时间：
2021-02
影响因子：
2.9
通讯作者：
Samarpan Chakraborty;B. Balachandran
中科院分区：
文献类型：
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作者：
Samarpan Chakraborty;B. Balachandran
这里考虑使用弱可压缩平滑粒子流体动力学 (WCSPH) 构造的数值波池中波的产生和传播。通过实施不同的 Wendland 核并结合不同的数值耗散方案，进行了数值波槽模拟。通过使用通用过程图形处理单元 (GPGPU) 计算来加速模拟，以利用模拟的大规模并行特性，从而提高流程效率。已经进行了短域数值实验来验证所使用的耗散方案。波浪池实验由活塞式造波器和适当的被动吸收装置组成，以便于与理论预测进行比较。根据静水压力和波面高程，对不同数值波浪池实验的性能进行了比较。在能量分析的基础上还研究了不同核函数的数值耗散效应。最后，观测和结果用于得出中长距离传播波浪模拟的最佳数值设置，这可以在通过这种数值波池模拟研究海洋中观测到的极端波浪和能量局部化方面发挥重要作用。
Generation and propagation of waves in a numerical wave tank constructed using Weakly Compressible Smoothed Particle Hydrodynamics (WCSPH) are considered here. Numerical wave tank simulations have been carried out with implementations of different Wendland kernels in conjunction with different numerical dissipation schemes. The simulations were accelerated by using General Process Graphics Processing Unit (GPGPU) computing to utilize the massively parallel nature of the simulations and thus improve process efficiency. Numerical experiments with short domains have been carried out to validate the dissipation schemes used. The wave tank experiments consist of piston-type wavemakers and appropriate passive absorption arrangements to facilitate comparisons with theoretical predictions. The comparative performance of the different numerical wave tank experiments was carried out on the basis of the hydrostatic pressure and wave surface elevations. The effect of numerical dissipation with the different kernel functions was also studied on the basis of energy analysis. Finally, the observations and results were used to arrive at the best possible numerical set up for simulation of waves at medium and long distances of propagation, which can play a significant role in the study of extreme waves and energy localizations observed in oceans through such numerical wave tank simulations.