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为了合理分析孤立波作用下破碎区单圆柱附近的水流结构以及圆柱受力特性,该文利用OpenFOAM开源程序求解基于Navier-Stokes方程的三维数值模型,该模型采用S-A IDDES湍流模型,使用修正的VOF方法捕捉自由液面。研究发现,该数值模型能合理捕捉到孤立波与圆柱相互作用过程中复杂的液面形态变化;圆柱附近自由液面沿柱面呈三维分布,上爬过程的柱前雍高显著大于回落过程的柱后雍高;回落过程中柱前形成的尾涡在强度和范围上大于上爬过程中柱后形成的尾涡;圆柱表面的动水压强随水深的增长呈近似线性增长,最大值位于上爬过程中最大雍高时刻的迎浪点位置;圆柱所受的波浪力与柱面附近自由液面雍高历时相符,且上爬过程圆柱受到的波浪力明显大于回落过程。
In order to reasonably analyze the flow structure and cylindrical force near a single cylinder under the action of solitary wave, a three-dimensional numerical model based on the Navier-Stokes equation is solved by the OpenFOAM open source program. The model uses the SA IDDES turbulence model and the modified VOF Method to capture free surface. The results show that the numerical model can reasonably capture the complicated liquid surface morphological changes during the interaction between solitary waves and the cylinder. The free surface near the cylinder is three-dimensionally distributed along the cylinder surface. The back vortex formed before the column in the fall process is larger than the vortex formed in the column during the climb process. The hydrodynamic pressure on the column surface increases approximately linearly with the increase of water depth, and the maximum value is located above The maximum wave height during the climbing process was at the wave-receiving point. The wave force on the column coincided with that of the free surface near the cylinder, and the wave force on the column during the climbing process was significantly larger than that of the falling process.