钱塘江二维涌潮数值模拟及其应用

2D numerical simulation of bore on Qiantang River and its application

分析了涌潮数值模拟的困难,综述了钱塘江涌潮数值模拟的进展,应用有限体积-KFVS格式建立了钱塘江二维涌潮数值模型。模型在验证计算的基础上,预测了杭州湾规划设想方案、治江围涂工程和桥梁工程等对涌潮的影响,并已推广到溃坝波和海啸传播过程的数值模拟。结果表明,涌潮数值模型分辨率高,计算稳定,守恒性好。该模型不但适用于无涌潮水域的模拟,也适用于传统数值模型不能模拟的涌潮等间断流的模拟。

The difficulty for numerical simulation of tidal bore was analyzed, and the development for numerical simulation of tidal bore on the Qiantang River was summarized, 2D numerical model for the tidal bore on the Qiantang River was developed using FVM- KFVS scheme. Based on the verification for the tidal bore, the model predicted the effect of the regulation planning for Hangzhou Bay, the project of regulation/reclamation and bridge project on the tidal bore on the Qiantang River, and has been extended to simulate the propagation of dam- break wave and tsunami. The computational results show that the scheme is accurate and robust. The model can be applied to simulate flow in water area without tidal bore, but also can compute discontinuous flows such as tidal bore, which traditional numerical models are not able to do.