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首页> 外文期刊>Engineering analysis with boundary elements >Fully nonlinear wave interaction with an array of truncated barriers in three dimensional numerical wave tank
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Fully nonlinear wave interaction with an array of truncated barriers in three dimensional numerical wave tank

机译：三维数值波箱中与一组截断壁垒的完全非线性波相互作用

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摘要

Wave transition due to coinciding with an array of truncated barrier is simulated by a fully nonlinear three dimensional potential Numerical Wave Tank (NWT). The potential theory is used to describe kinematics of the flow field and the isoparametric Boundary Element Method (BEM) is employed to solve the boundary value problem. The Mixed Eulerian-Lagrangian (MEL) approach and fourth order Runge-Kutta time integration applied for time-marching scheme to model the temporary and fully nonlinear free surface. At each time step, solution of Laplace equation in the Eulerian frame is applied to the fully nonlinear free surface conditions in the Lagrangian manner to achieve the new positions and the boundary value of fluid particles for the next time step. Normal flux of potential wave theory is specified on the inflow boundary to stimulate fluid field and to propagate the nonlinear wave along the tank. To minimize the reflected wave energy into the computational domain, two artificial sponger layers are adopted on the free surface at the both ends of the numerical wave tank. Accuracy and convergence of the present numerical procedure is conducted. Also, interaction between a near trapped mode array of truncated barriers and nonlinear input wave is simulated.
机译：由完全截断的势垒阵列重合导致的波跃迁由完全非线性的三维势能数值波箱（NWT）模拟。用势能理论描述流场的运动学，用等参边界元方法（BEM）解决边界值问题。混合欧拉-拉格朗日（MEL）方法和四阶Runge-Kutta时间积分应用于时间行进方案，以对临时和完全非线性的自由表面进行建模。在每个时间步，将欧拉框架中的拉普拉斯方程的解以拉格朗日方式应用于完全非线性的自由表面条件，以在下一时间步获得新的位置和流体粒子的边界值。在流入边界上指定势波理论的法向通量，以激发流体场并沿储罐传播非线性波。为了将反射波能量最小化到计算域中，在数值波箱两端的自由表面上采用了两个人造海绵层。进行了当前数值程序的准确性和收敛性。此外，模拟了截断势垒的近陷模式阵列与非线性输入波之间的相互作用。

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