Journal of Tropical Oceanography ›› 2024, Vol. 43 ›› Issue (5): 116-130.doi: 10.11978/2023139CSTR: 32234.14.2023139

• Marine Engineering • Previous Articles     Next Articles

Numerical simulation study on the effect of wind on the hydrodynamic characteristics of undular tidal bores seawall

WANG Xu1,2(), QU Ke1,2,3(), WANG Zijun1, YANG Yuanping4, WANG Chao1, ZHANG Liangbin1   

  1. 1. School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China
    2. Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China
    3. Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, China
    4. Zhejiang Institute of Hydraulics & Estuary, Hangzhou 310017, China
  • Received:2023-09-27 Revised:2023-12-13 Online:2024-09-10 Published:2024-10-10
  • Supported by:
    National Key Research and Development Program Project(2022YFC3103601); National Natural Science Foundation of China Key Project(51839002); Hunan Provincial Natural Science Foundation Project(2021JJ20043); Open Fund of Zhejiang Key Laboratory of Estuaries and Coasts(ZIHE21009); Zhejiang Provincial Natural Science Foundation(LY22E090007); Science and Technology Program Project of Zhejiang Province Water Resources Department(RC2020)

Abstract:

Based on the two-dimensional incompressible two-phase flow numerical model, the reliability of the two-phase flow surge computational model in simulating the interaction between the wave-like surge and the sea pond is verified by comparing the numerical computational results with the experimental data. Then, this paper systematically analyses the effects of wind speed, surge height, pre-tidal water depth and slope gradient on the wave-exceeding characteristics of the undulating surge on the seapond by setting up reasonable calculation conditions. Calculation results show that wind speed significantly affects the wave overtopping of the wave-like surge on the seapond, the higher the wind speed, the higher the wave overtopping of the surge, and the higher the load on the retaining wall; with the increase of surge height and pre-tidal depth, the wave overtopping of the surge and the load on the retaining wall increase; when the slope of the seapond is increased, the wave overtopping and the load on the retaining wall show the tendency to increase firstly and then decrease later. The research results of this paper have certain reference significance for the correct understanding of wave surge in the pond under the action of wind, and the change rule of the load law of wave retaining wall, which provides a scientific basis for the engineering design and safety assessment of water-related buildings in the river section of wave surge.

Key words: undular tidal bore, wind, surge load, overtopping, hydrodynamic characteristics, numerical simulation