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首页> 外文期刊>Proceedings of the International Conference on Coastal Engineering >NUMERICAL MODELLING OF HYDRODYNAMICS AND SEDIMENT TRANSPORT IN THE SURF ZONE : A SENSITIVITY STUDY WITH DIFFERENT TYPES OF NUMERICAL MODELS
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NUMERICAL MODELLING OF HYDRODYNAMICS AND SEDIMENT TRANSPORT IN THE SURF ZONE : A SENSITIVITY STUDY WITH DIFFERENT TYPES OF NUMERICAL MODELS

机译：地表水动力学和泥沙输移的数值模拟：不同类型数值模型的敏感性研究。

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摘要

A comparison between two very different numerical models is presented: Delft3D and XBeach. Delft3D (Deltares) calculates non-steady flow and transport phenomena that result from tidal and meteorological forcing. The wave propagation is calculated in the frequency domain. XBeach (Unesco-IHE, Delft University and Deltares) consists of formulations for short wave envelope propagation (time-dependent wave action balance), non-stationary shallow water equations, sediment transport and bed update. The model is able to resolve the time dependent long waves, which are important in the surf zone. A number of simplified cases are defined beforehand taking into account actual features and conditions existing in chosen problem areas. The examination of these simplified cases allows for the identification of driving processes and the assessment of the sensitivity to certain relevant parameters, with the advantage of working in scenarios of limited complexity and without excessive computational load.
机译：给出了两个非常不同的数值模型之间的比较：Delft3D和XBeach。 Delft3D（Deltares）计算潮汐和气象强迫引起的非稳定流动和运输现象。波传播是在频域中计算的。 XBeach（UNESCO-IHE，代尔夫特大学和德尔塔雷斯大学）由短波包络传播（随时间变化的波浪作用平衡），非平稳浅水方程，沉积物迁移和河床更新的公式组成。该模型能够解决与时间相关的长波，这在冲浪区很重要。预先定义了许多简化的案例，要考虑到所选问题区域中存在的实际特征和条件。对这些简化案例的检查可以确定驾驶过程并评估对某些相关参数的敏感性，其优点是可以在复杂性有限且没有过多计算负荷的情况下工作。

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