非结构化网格嵌套波浪数值模拟

Nested Wave Numerical Simulation of Unstructured Mesh

为了准确模拟射阳河口航道和港池水域的波浪传播,基于非结构化三角网格的第3代波浪模型SWAN(Simulation Waves Nearshore),采用非结构化网格嵌套技术,建立了大区域和浅海工程海域嵌套波浪数学模型;进行了大、小计算域波浪数值模型的验证,结果计算值与实测值吻合良好;计算了各种方案情况下港池及航道的波浪要素,可作为工程设计的科学依据.研究结果表明,通过应用网格嵌套技术,一方面在充分发挥非结构化网格波浪数学模型优势的基础上,大大减小了计算域中网格的数量,提高了计算速度;另一方面可以布置更加精细的计算网格,适应复杂的地形、曲折的岸线边界,提高计算结果的准确性.

In order to accurately simulate the wave propagation of waterway and basin area in the estuary of Sheyang River,first,based on the application of unstructured triangular mesh of the third generation wave model SWAN and using the unstructured grid nesting technology,a large area and shallow engineering nested sea wave mathematical model was established.Then,the large and small computational domain wave numerical models were veryfied and the calculated values and measured values agreed well.Finally,the various cases of harbor basin and channel wave parameter were calculated,providing a scientific basis for the design department.The research results show that by applying the nested grid technology,on the one hand,the number of grid computing field was greatly reduced and the compution speed was increased.On the other hand,more intensive computing grid which can adapt to the complex topography and winding coastline of the border can be constructed,thus,raising the accuracy of the calculation results.