In this work, a new numerical model for cross-shore beach profile evolution, IH2VOF-SED, is developed. It consists in the bidirectional coupling of a 2D RANS hydrodynamic solver and a sediment transport module. The resulting model is extensively validated against three benchmark cases at different scales, attending to the hydrodynamics, bottom shear stress and bathymetry evolution. Comparisons between experimental and numerical results show a good agreement for both the flow variables and the seabed evolution in all the validation cases without making use of calibration parameters. Additionally, the qualitative analysis of the results is in accordance with previous experimental observations of sediment transport induced by breaking waves. The computational cost is greatly reduced to about 1/10 of other available RANS models. As a novel aspect regarding RANS models, the model is able to simulate the swash zone and changes in the position of the coastline. A good compromise between precision and computational cost is achieved, allowing for an in-depth analysis of the processes leading to the cross-shore profile evolution.

在这项工作中，开发了一种新的跨海岸海滩剖面演化数值模型 IH2VOF-SED。它包括二维 RANS 流体动力学求解器和沉积物输送模块的双向耦合。由此产生的模型在不同尺度的三个基准案例中得到了广泛验证，涉及流体动力学、底部剪切应力和水深演化。实验和数值结果之间的比较表明，在不使用校准参数的情况下，所有验证案例中的流动变量和海底演化都具有良好的一致性。此外，结果的定性分析与先前对破碎波引起的沉积物输送的实验观察一致。计算成本大大降低到其他可用 RANS 模型的 1/10 左右。作为 RANS 模型的一个新颖方面，该模型能够模拟冲刷区和海岸线位置的变化。实现了精度和计算成本之间的良好折衷，允许对导致跨海岸剖面演变的过程进行深入分析。