基于间断有限元方法的三维近岸波生流数值模型建立

在三维水动力模型中引入三维辐射应力,水滚影响以及波浪附加紊动效应,并基于间断有限元方法建立了非结构化网格三维波生流数值模型。采用实验室内斜坡地形条件下正向入射波在破波带附近产生的近底回流和斜向入射波产生的沿岸流对模型进行了验证。结果表明,计算值与实测值吻合程度较好,该模型可以较好地描述三维近岸波生流。

A numerical model of three dimensional nearshore wave-induced currents based on discontinuous Galerkin method

Based on the discontinuous Galerkin method, the concepts of three-dimensional radiation stress, surface roller and wave turbulent mixing effects are applied to develop a three-dimensional numerical model with unstructured grids for wave-induced currents. Validation of the model is carried out by comparing the model simulation with laboratory measurements for wave-induced currents over a slope, e.g. undertow and longshore currents. The model results show that the agreement between the simulated results and the laboratory measurements is generally good; and the proposed model can be used to describe three-dimensional wave-induced currents in nearshore zone.