内孤立波数值模拟方法研究  

Study of Numerical Simulation Method of Internal Solitary Waves

作　　者：苗得胜 郭海燕[1] 赵婧[2] 王飞[1] 王伟[1] 

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]青岛酒店管理职业技术学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2016年第10期123-128,共6页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(51279187);中央高校基本科研业务费项目(201262005)~~

摘　　要：本文选用RNGk-ε湍流模型封闭二维不可压缩N-S方程组,选用KdV、mKdV理论作为输入条件进行内孤立波造波模拟。运用流体模拟软件Fluent建立二维内波数值水槽,用动网格手段实现网格变形模拟物理边界造波法,用VOF方法进行密度分层流体的内界面追踪,对不同非线性强度的二相流内孤立波进行了数值模拟。并将数值模拟结果与KdV、mKdV理论波形以及内波试验水槽所造内孤立波进行对比,验证了此套造波方法在Fluent中进行内孤立波模拟的可行性。A two-dimensional flume numerical simulation model is established with Fluent to study generation and propagation of internal solitary wave.RNG k-epsilon turbulent model is adopted to close NavierStokes equations.Internal solitary wave is generated by wave-making board which is controlled by user code written in C language based on KdV and mKdV theories.Dynamic grid method is adopted to adapt the grid deformation around the wave-making board during the simulation.VOF method is adopted to catch the interface between density-stratified fluids,which represents the waveform of internal solitary wave.Internal solitary waves with diverse nonlinear strength are simulated in this paper to study the application range of KdV and mKdV theories.Data comparison of numerical solution,theoretical solution and experiment solution is carried out after the simulation.The feasibility and accuracy of internal solitary wave simulation model raised in this paper is verified through the comparison.The application range of KdV and mKdV theories is also discussed based on the comparison.

关 键 词：内孤立波 FLUENT 动网格 造波方法 数值模拟 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]