基于非结构网格的波流耦合数值模式研究

A COUPLED WAVE—CURRENT NUMERICAL MODEL ON UNSTRUCTURED GRIDS

本文采用ADCIRC模型和SWAN模型,建立了一个基于非结构化网格的波流耦合数值模式,风浪计算和潮汐风暴潮计算均采用同一套三角网格,对复杂岸线和建筑物布置均有较好的描述,且避免了模型插值,提高了计算效率和精度。利用该模型对渤海湾西南海域几次强风过程中的风浪和潮汐风暴潮进行了研究,通过实测资料对该模型进行了验证,结果表明该模式具有较高的精度,能较好地描述风浪、潮汐风暴潮的传播演变及其相互作用,可应用于风浪与潮汐风暴潮的模拟计算。

Using unstructured grids, we developed a numerical wave-tide-current coupling model applying SWAN and ADCIRC schemes. To fit the boundary and structures better, the two schemes are run on the same unstructured grids. Thus, information is passed without spatial interpolation; and so the efficiency and accuracy of the coupled model are improved significantly. The coupled model is then applied to study wind waves and storm tides in the Bohai Sea during several strong wind cases. The model is verifiedagainst measured data. The results show that the model has high accuracy and can be used to simulate waves, circulation, and their propagation from deep water to nearshore systems.