CAJ | 학술논문

为获得具有自由液面的三维波流水槽，基于FLOW-3D有限差分程序，选用RNG ?-?紊流模型，基于线性波速度入口法造波，采用VOF方法对自由液面进行追踪。构建具有自由液面的三维波流联合作用数值水槽，对比压力出流边界与Sammerfeld辐射边界发现，在波流水槽内采用压力出流边界能够保持流体体积守恒，波形稳定；加入的孔隙结构，不仅能保证良好的消波效果，而且流体能够顺利通过，对消除反射波影响效果良好；与实验结果对比发现，垂向时均流速与实验数据拟合较好。波流场中桩柱前形成明显下潜水流及漩涡，是形成局部冲刷主要原因。本文所构建的波流数值模型波形稳定、具有良好的波流特性，能较好反应波浪与水流之间的相互作用，可进一步模拟波流场与结构物之间的相互作用或波流作用下泥沙冲刷等研究。
위획득구유자유액면적삼유파류수조，기우FLOW-3D유한차분정서，선용RNG ?-?문류모형，기우선성파속도입구법조파，채용VOF방법대자유액면진행추종。구건구유자유액면적삼유파류연합작용수치수조，대비압력출류변계여Sammerfeld복사변계발현，재파류수조내채용압력출류변계능구보지류체체적수항，파형은정；가입적공극결구，불부능보증량호적소파효과，이차류체능구순리통과，대소제반사파영향효과량호；여실험결과대비발현，수향시균류속여실험수거의합교호。파류장중장주전형성명현하잠수류급선와，시형성국부충쇄주요원인。본문소구건적파류수치모형파형은정、구유량호적파류특성，능교호반응파랑여수류지간적상호작용，가진일보모의파류장여결구물지간적상호작용혹파류작용하니사충쇄등연구。
In order to obtain three-dimensional numerical wave-current flume with free surface. Based on FLOW-3D with RNGk-?turbulence model, the Volume of Fluid (VOF) method was used to track the nonlinear free surface. Contrast pressure outflow boundary and Summerfield radiation boundary show that pressure outflow could maintain fluid volume conservation. And the reflected waves can be absorbed in porous structure at the rear part of the wave flume. Compared with the experiment, it shows that this numerical model accurately predicts flow vertical distribution characteristics and the interaction between waves and currents. Down flow and eddy can be observed in the front of cylinder. The numerical wave-current model can be used to simulate the interaction between wave-current and structures, or sediment scour in wave-current.