基于OpenFOAM软件的内孤立波生成模拟及试验

Simulation and Test of Internal Solitary Wave Generation Based on OpenFOAM Software

为探究OpenFOAM软件在内孤立波生成模拟方面的可靠性,建立小型内波水槽,采用重力塌陷法生成内孤立波进行物理试验。基于OpenFOAM建立等尺度数值水槽,采用流体体积模型的不可压缩、绝热、不可溶多相界面捕捉求解器multiphaseInterFoam,设置空气-硅油-水三相流体,模拟生成内孤立波。将数值模拟所得波幅、波形、波速等数据与试验和理论解进行对比。结果表明,该方法模拟生成的内孤立波与物理试验和理论解均吻合较好,具有较高的精度,可进一步应用于研究内孤立波的演化特性及其与结构物相互作用研究中,在物理海洋学和军事海洋学都具有重要的应用价值。

In order to explore the reliability of the simulation of inner solitary wave generation in OpenFOAM software,a small internal wave tank is established,and the gravity collapse method is used to generate internal solitary waves for physical tests.An equal-scale numerical water tank is established based on OpenFOAM,the solution multiphaseInterFoam is captured by the incompressible,adiabatic and insoluble multiphase interface of the Volume of Fluid(VOF)model,the air-silicone-water three phase fluid is set,and the internal solitary wave generation is simulated.The data of amplitude,waveform and velocity obtained by the numerical simulation are compared with the experimental and theoretical solutions.The results show that the simulated inner solitary wave is in good agreement with those in the physical test and theoretical solution and is of high accuracy,which can be further applied to the study of the evolution characteristics of inner solitary wave and its interaction with structures,and is of important application value in physical oceanography and military oceanography.