三维数值波浪水池技术与应用

建立了用于波浪-结构物相互作用数值模拟的三维数值波浪水池．应用VOF方法对粘性流动的基本方程进行数值求解并描述其自由表面，水池计算域的一侧使用数值造波机条件产生斜入射波浪，其下游开边界联合使用辐射条件和局部强迫衰减，侧向边界使用周期性条件使斜向波浪透过．数值试验表明，所建立的三维数值波浪水池产生和传播波浪具有良好的重复性和稳定性，应用于海洋结构物波浪荷载的确定也是可靠的．

3-D numerical-wave-tank technology and its application

A 3-D numerical-wave-tank (NWT) is developed for numerical simulations of wave-structure interactions. The volume of fluid (VOF) method is used to numerically solve the governing equations of viscous flows and track the free surface. Some segmented numerical wave makers are set to generate obliquely incident waves at one end of the tank. At the downwave end of the tank which is treated as an open boundary, an artificial damping scheme is applied to reduce the vertical velocity within a velocity reduction zone adjacent to the open boundary. In order to control the fluid motion at the open boundary, the Sommerfeld radiation condition is applied to those reduced waves. For oblique wave generation, the operation of lateral periodic boundaries is adopted. Numerical tests show that waves generating and propagating in the present 3-D NWT are of good repeatability and stability. Using it, wave loads on a fixed model ship are calculated and compared with experimental values.