2D NUMERICAL SIMULATION OF TIDAL BORE ON QIANTANG RIVER USING KFVS SCHEME

Abstract

Qiantang estuary is famous worldwide for tidal bore, whose maximal height reaches about 4 m. In this paper, a new numerical model, based on Boltzmann equation, Kinetic Flux Vector Splitting (KFVS) scheme with the finite-volume method combined with the improved Riemann solution for moving boundary treatment, is constructed to numerically simulate the tidal bore on the Qiantang River. The model is discretized by unstructured triangular grid and has the second order accuracy in spaces. The simulated results show that the model can simulate the whole process of formation, evolution, and dissipation of the tidal bore on the Qiantang River. The typical bore sceneries such as the crossed bore, the thread-shape bore and the returned tidal bore have been reproduced. These studies lead to more understanding about the characteristics of the tidal bore.