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Siltation by sediment-induced density currents

机译:沉积物引起的密度流淤积

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This paper describes the results of numerical experiments with a three-dimensional hydrodynamic and mud transport model in which sediment―fluid interaction is taken into account through the effects of hindered settling, buoyancy destruction in the turbulence k-ε model and sediment-induced barocline pressure gradients in the momentum equations. The model was applied to a schematic case representing a coastal area with a tidal river, navigation channel and harbour basin, and a real-world case, viz. Rotterdam harbour area in The Netherlands. The results show that the sediment transport into the harbour area, and subsequent siltation rates, increase by a factor 3 to 5 due to the sediment-fluid interaction. It is shown that the larger contribution stems from an increase in vertical gradients in suspended sediment.
机译:本文描述了三维水动力和泥浆运移模型的数值实验结果,该模型通过受阻沉降,湍流k-ε模型中的浮力破坏和沉积物诱发的斜压影响考虑了泥沙-流体相互作用。动量方程中的梯度。该模型应用于代表潮汐河,航海通道和港口盆地的沿海地区的示意案例,以及真实案例,即。鹿特丹港口区域在荷兰。结果表明,由于沉积物与流体的相互作用,沉积物向港口区的迁移以及随后的淤积率增加了3到5倍。结果表明,较大的贡献源于悬浮沉积物中垂直梯度的增加。

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