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 ĸ-ɛ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。%In order to obtain three-dimensional numerical wave-current flume with free surface. Based on FLOW-3D with RNGk-ɛturbulence 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.
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