Abstract The results of Direct Numerical Simulations of the oscillatory flow over a cohesionless bed of spherical particles, mimicking sediment grains, are described. The flow around the sediment particles is explicitly computed by using the immersed boundary method, which allows the force and torque acting on the particles to be evaluated along with their dynamics. Different values of the Reynolds number and different values of the ratio between the grain size and the thickness of the boundary layer are considered such that the results are useful to quantify the sand transport generated by sea waves in the region offshore of the breaker line. Therefore, the results are used to test the capability of empirical sediment transport formulae to predict the sediment transport rate during the oscillatory cycle.

中文翻译：

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振荡流下的沉积物输运

摘要 描述了模拟沉积颗粒的球形颗粒无内聚床的振荡流的直接数值模拟结果。沉积物颗粒周围的流动是通过使用浸入边界方法明确计算的，该方法允许评估作用在颗粒上的力和扭矩以及它们的动力学。考虑了雷诺数的不同值以及边界层的粒度与厚度之间的比率的不同值，使得结果可用于量化破碎管线近海区域中由海浪产生的沙子输送。因此，结果用于检验经验输沙公式预测振荡循环期间输沙速率的能力。