An improved incompressible SPH model for simulation of wave–structure interaction
An improved incompressible SPH model for simulation of wave–structure interaction
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DOI：
10.1016/j.compfluid.2012.09.024
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发表时间：
2013-01
影响因子：
2.8
通讯作者：
Xin Liu;Haihua Xu;Songdong Shao;P. Lin
中科院分区：
文献类型：
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作者：
Xin Liu;Haihua Xu;Songdong Shao;P. Lin
建立了一个改进的二维不可压缩光滑粒子流体动力学（ISPH）模型，用于模拟自由表面流与结构物的相互作用。在该模型中，提出了一种改进的固体边界镜像粒子处理方法，重新定义了镜像参数和镜像规则。所提出的镜像粒子处理更精确，压力的人工振荡更少。通过溃坝基准试验验证了压力计算的改进，并与文献资料进行了比较，结果令人满意。通过一系列的数值模拟，进一步验证了该模型在模拟波浪与各种形状海岸结构物相互作用中的适用性。这些包括线性波反射从一个不可渗透的防波堤，孤立波通过一个矩形障碍物和周期波列分解淹没货架。在这些模拟中，所采用的总粒子数高达150，000，并且当数值结果与文献中发现的可用的分析、实验和其他数值数据进行比较时，获得了相当好的一致性。
An improved two-dimensional Incompressible Smoothed Particle Hydrodynamics (ISPH) model is developed to simulate free surface flow interaction with structures. In this model, the improved mirror particle treatment for solid boundaries is developed, in which the mirror parameters and mirroring rules are redefined. The proposed mirror particle treatment is more accurate with less artificial oscillations of pressure. The improvement of pressure computations is verified by a benchmark test of dam break flow and the comparisons with the documented data showed satisfactory agreement. A series of numerical simulations have been conducted to further verify the applicability of the model for simulations of wave interaction with coastal structures of various shapes. These include linear wave reflection from an impermeable breakwater, solitary wave passing a rectangular obstacle and periodic wave train decompositions over a submerged shelf. In these simulations, the total particle number employed is up to 150,000 and rather good agreement has been obtained when the numerical results are compared to available analytical, experimental, and other numerical data found in literatures.