基于二阶规则波模拟的数值波浪水槽优化  

Optimization of a numerical wave tank based on simulations of 2 nd order regular waves

作　　者：曾诚[1] 尹雨然 周婕 邱斐 白一墨 王玲玲[1] ZENG Cheng;YIN Yuran;ZHOU Jie;QIU Fei;BAI Yimo;WANG Lingling(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;College of Mechanics and Materials,Hohai University,Nanjing 211100,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]河海大学力学与材料学院,江苏南京211100

出　　处：《河海大学学报（自然科学版）》2023年第4期33-40,共8页Journal of Hohai University(Natural Sciences)

基　　金：国家重点研发计划项目(2022YFC3202605);江苏省水利科技项目(2022061)。

摘　　要：基于CFD开源软件包OpenFOAM,建立了基于Navier-Stokes方程的二维数值波浪水槽模型。模型采用体积函数(VOF)法捕捉自由水面,采用k-ω SST紊流模型封闭控制方程。针对不同波陡(i=0.01~0.06)的Stokes二阶波,分别采用速度边界法或推板造波法进行造波,采用阻尼消波法、辐射边界法或松弛区域法进行消波;通过对不同造波和消波方法组合方式计算结果的比较,分析了数值波浪水槽在不同波陡工况下的消波效果和造波效果。模拟结果表明:对于小波陡(i=0.01~0.03)工况,采用速度边界造波和松弛区域法消波的组合方式具有较高的模拟精度;对于大波陡(i=0.04~0.06)工况,采用推板造波法造波和基于平方形式阻尼函数的阻尼消波法消波的组合方式具有较高的模拟精度。In this study,a two-dimensional numerical wave tank(NWT)was developed by solving the Navier-Stokes equations with the open-source CFD library OpenFOAM.The volume of fluid(VOF)method was adopted for the free surface capture and the k-ωSST model was used for the closure of governing equations.While the velocity profile method and the piston type wavemaker were tested separately for the wave generation,the artificial damping condition,Sommerfeld radiation condition and relaxation zone method were tested respectively to absorb the wave in the simulations of Stokes 2 nd waves with different wave steepness(i=0.01~0.06).According the comparisons between the numerical results and the analytical solutions,the performance of the model settings with different wave generation and absorption methods were analyzed.For the numerical simulations of 2 nd order regular waves,the optimal setting is velocity profile method and relaxation zone method for cases with small wave steepness(i=0.01~0.03),and the piston type wavemaker and the artificial damping condition with squared damping function for cases with large wave steepness(i=0.04~0.06).

关 键 词：数值波浪水槽 Stokes二阶波 阻尼消波 波陡 OPENFOAM 

分 类 号：TV139.2[水利工程—水力学及河流动力学]