网衣波浪水动力特性的数值模拟初步研究

Preliminary study of hydrodynamic characteristics of net panel in waves

为研究网衣与波浪相互作用机理,以粘性不可压缩Navier-Stokes方程为控制方程,通过VOF方法追踪波面,采用推板造波的方式建立了数值波浪水槽。数值模拟过程中利用多孔介质模型模拟网衣,根据网衣受力的经验公式利用最小二乘法拟合得到相应的多孔介质模型参数。利用该数学模型研究了平面网衣对波浪形态影响及网衣受力情况,并与物理模型试验结果相比较。结果表明,计算获得的网衣受力和波浪透射系数与试验结果相一致,证明了该数值模型研究网衣波浪水动力特性的适用性。

In order to research the mechanism between net panel and waves, this paper used the incompressible Navier-Stokes equations as the governing equations, adopted the movement border as a wave generator, the numerical wave tank was established by the volume of fluid （VOF） method which used to track the wave surface. In the simulation the net panels were simplified as porous media model, according to experiential formulae of force on net panel, the coefficient of porous media model was determined by the least square fitting. With this numerical model, the study about wave through net panel was simulated, the numerical results were compared with the experimental results. The comparison showed the force on net panel and wave transmission coefficient agreed well with the experimental data, it＇ s indicated that this numerical model is applicable for the simulation of hydrodynamic ProPerty of net panel.