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MODELLING OF TIME-DEPENDENT SAND TRANSPORT AT THE BOTTOM BOUNDARY LAYER IN THE SURF ZONE

机译:地带底部边界层时变砂运输的建模

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摘要

The present paper is aimed to formulate a numerical model for calculating the time- dependent velocity field and the space and time distribution of sand concentration inside the bottom boundary layer in the surf zone. The numerical results are compared with recent laboratory data. The 2DV (two-dimensional vertical) numerical module for the ve- locity field is based on the Reynolds averaged form of the Navier-Stokes equations while the sand transport module uses the turbulent convection-diffusion equation. The equi- phase mean values for the horizontal and vertical velocities within the bottom boundary layer (the flow field) and the equi-phase mean values for the sand concentration are ob- tained.
机译:本文旨在建立一个数值模型,用于计算随时间变化的速度场以及冲浪区底部边界层内沙浓度的时空分布。数值结果与最近的实验室数据进行了比较。速度场的2DV(二维垂直)数值模块基于Navier-Stokes方程的雷诺平均形式,而砂传输模块则使用湍流对流扩散方程。获得了底部边界层(流场)内水平和垂直速度的等相平均值以及砂子浓度的等相平均值。

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