基于SW型向量分裂格式的钱塘江涌潮模拟

Simulation of the Tidal Bore of Qiantang River Based on Steger-Warming Type Flux Vector Split Scheme

在有限体积法的框架下采用无结构网格,应用Steger-warming型的向量分裂格式求解黎曼初值问题的外法向数值通量,通过设置临界水深选取涨落潮期间曼宁系数模拟了钱塘江潮波的整体变形,并比较了沿程测点潮位数值计算与实测值。结果表明,该法可行、精度高、稳定性好,能较好地复演钱塘江潮位暴涨过程及涌潮的宏观特性。

Under the framework of finite volume method with unstructured mesh,Steger-warming type vector split scheme is used to solve outward normal numerical flux of Riemann initial value problem and simulate the wave deformation of Qiantang River.Manning coefficients during flood tide and ebb tide of Qiantang River are chosen by setting critical water depth.Comparison of the calculation tidal level along the observation point with the measured value,the results show that the proposed method has characteristics of f...