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Numerical Investigation on the Collision between a Solitary Wave and a Moving Cylinder
Water ( IF 3.0 ) Pub Date : 2020-07-31 , DOI: 10.3390/w12082167
Emir Taha Eren , Mahdi Tabatabaei Malazi , Galip Temir

A 2-D numerical wave tank (NWT) was applied for solving the interaction between a solitary wave and a moving circular cylinder. The cylinder was placed at various positions from the tank bed floor. The cylinder can move at a constant horizontal velocity towards the solitary wave. The collision between a solitary wave and a moving cylinder is investigated at various conditions. A total of fifteen cases were studied. Ten different numerical simulations were used, including five submergence depths and two different moving velocities. The other five different numerical simulations were studied when the cylinder was unmoved in the NWT for comparing wave-structure interaction results between the moving and unmoved cylinders. The numerical results were obtained by calculating Reynolds-Averaged Navier-Stokes (RANS) equations and the volume of fluid (VOF) equations. Two different codes (User-Define-Function-UDF) were used for the generation of a solitary wave by moving a wave paddle and traveling cylinder in the NWT. The dynamic mesh method was applied for recreating mesh. First, the ability of CFD codes to generate a solitary wave by using wave paddle movement and the hydrodynamic forces of a moving cylinder were validated by numerical results. Further, the free-surface elevation and hydrodynamic forces were considered at various conditions. The numerical results show that moving cylinder velocity and the space between the cylinder and the tank bed floor have significant effects on surface displacement and hydrodynamic forces.

中文翻译:

孤立波与运动圆柱碰撞的数值研究

应用二维数值波浪水箱 (NWT) 来解决孤立波与移动圆柱体之间的相互作用。圆筒被放置在距罐床底板的不同位置。圆柱体可以以恒定的水平速度朝向孤立波移动。在各种条件下研究了孤立波和移动圆柱体之间的碰撞。共研究了十五个案例。使用了十种不同的数值模拟,包括五种淹没深度和两种不同的移动速度。当圆柱在 NWT 中不动时,研究了其他五种不同的数值模拟,以比较移动和未移动圆柱之间的波浪结构相互作用结果。数值结果是通过计算雷诺平均纳维-斯托克斯 (RANS) 方程和流体体积 (VOF) 方程获得的。通过在 NWT 中移动波浪桨和行进圆柱体,使用两种不同的代码(用户定义功能-UDF)生成孤立波。动态网格方法用于重新创建网格。首先,通过数值结果验证了 CFD 代码通过使用波浪桨运动和移动圆柱体的水动力产生孤立波的能力。此外,还考虑了各种条件下的自由表面高度和水动力。数值结果表明,移动圆柱体速度和圆柱体与罐床底板之间的空间对表面位移和水动力有显着影响。通过在 NWT 中移动波浪桨和行进圆柱体,使用两种不同的代码(用户定义功能-UDF)生成孤立波。动态网格方法用于重新创建网格。首先,通过数值结果验证了 CFD 代码通过使用波浪桨运动和移动圆柱体的水动力产生孤立波的能力。此外,还考虑了各种条件下的自由表面高度和水动力。数值结果表明,移动圆柱体速度和圆柱体与罐床底板之间的空间对表面位移和水动力有显着影响。通过在 NWT 中移动波浪桨和行进圆柱体,使用两种不同的代码(用户定义功能-UDF)生成孤立波。动态网格方法用于重新创建网格。首先,通过数值结果验证了 CFD 代码通过使用波浪桨运动和移动圆柱体的水动力产生孤立波的能力。此外,还考虑了各种条件下的自由表面高度和水动力。数值结果表明,移动圆柱体速度和圆柱体与罐床底板之间的空间对表面位移和水动力有显着影响。数值结果验证了 CFD 代码通过使用波浪桨运动和移动圆柱体的水动力产生孤立波的能力。此外,还考虑了各种条件下的自由表面高度和水动力。数值结果表明,移动圆柱体速度和圆柱体与罐床底板之间的空间对表面位移和水动力有显着影响。数值结果验证了 CFD 代码通过使用波浪桨运动和移动圆柱体的水动力产生孤立波的能力。此外,还考虑了各种条件下的自由表面高度和水动力。数值结果表明,移动圆柱体速度和圆柱体与罐床底板之间的空间对表面位移和水动力有显着影响。
更新日期:2020-07-31
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