ISPH wave simulation by using an internal wave maker
ISPH wave simulation by using an internal wave maker
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DOI：
10.1016/j.coastaleng.2014.10.007
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发表时间：
2015
影响因子：
4.4
通讯作者：
Xin Liu;P. Lin;Songdong Shao
中科院分区：
文献类型：
--
作者：
Xin Liu;P. Lin;Songdong Shao
本文在不可压缩光滑粒子流体力学（ISPH）模型中引入了一种非反射内波生成算法，用于波浪模拟。对于不受反射波影响的波代，采用了从Boussinesq方程导出的动量源项，并将其加入到Navier-Stokes方程的拉格朗日形式中。本文提出了在ISPH方程中实现内力的技术细节，并进行了一系列数值试验，以选择相关参数并研究其在不同波浪条件下的灵敏度。在模型应用中，研究了垂直壁波的传播和反射问题，验证了模型在驻波生成中的性能和内波发生器的非反射特性。此外，提出了一种更具挑战性的梯形防波堤波浪分解过程，这是其他类似的基于颗粒的方法尚未充分研究的。在6个测波仪上的波面剖面模拟结果与实验结果吻合较好，表明该无反射内波造波器模型可以为波和波-结构相互作用的长时间模拟提供更可靠的粒子模拟工具。
In this paper, a non-reflection internal wave maker algorithm is included in the incompressible Smoothed Particle Hydrodynamics (ISPH) model for the wave simulations. A momentum source term derived from the Boussinesq equations is employed and added into the Lagrangian form of Navier–Stokes equations for the wave generations that are not affected by the reflected waves. In this work, the technical details of implementing the internal force into the ISPH equations are proposed and a series of numerical tests are carried out for the selection of relevant parameters and investigation of their sensitivities in different wave conditions. In model applications, the problems of wave propagation and reflection from a vertical wall are studied to verify the model performance in standing wave generations and the non-reflection characteristics of the internal wave maker. Furthermore, a more challenging wave decomposition process over a trapezoid breakwater is presented, which has not been fully investigated by other similar particle-based methods. The simulation results of wave surface profile on six wave gauges agree well with the experimental results and this shows that the present model with the non-reflection internal wave maker can provide a more robust particle modeling tool for the long time simulation of wave and wave–structure interactions.