Abstract
By coupling the three-dimensional hydrodynamic model with the wave model, numerical simulations of the threedimensional wave-induced current are carried out in this study. The wave model is based on the numerical solution of the modified wave action equation and eikonal equation, which can describe the wave refraction and diffraction. The hydrodynamic model is driven by the wave-induced radiation stresses and affected by the wave turbulence. The numerical implementation of the module has used the finite-volume schemes on unstructured grid, which provides great flexibility for modeling the waves and currents in the complex actual nearshore, and ensures the conservation of energy propagation. The applicability of the proposed model is evaluated in calculating the cases of wave set-up, longshore currents, undertow on a sloping beach, rip currents and meandering longshore currents on a tri-cuspate beach. The results indicate that it is necessary to introduce the depth-dependent radiation stresses into the numerical simulation of wave-induced currents, and comparisons show that the present model makes better prediction on the wave procedure as well as both horizontal and vertical structures in the wave-induced current field.
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Foundation item: The study was financially supported by the the National Natural Science Foundation of China (Grant No. 51709054) and the Public Science and Technology Research Funds Projects of Ocean (Grant Nos. 201405025 and 201505019).
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Wang, P., Zhang, Nc., Yuan, S. et al. Numerical simulation of the three-dimensional wave-induced currents on unstructured grid. China Ocean Eng 31, 539–548 (2017). https://doi.org/10.1007/s13344-017-0062-x
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DOI: https://doi.org/10.1007/s13344-017-0062-x