本文从水沙两相紊流的双流体数学模型出发,采用直接数值计算的方法,研究了海床面附近边界层内往复流对悬移质泥沙运动的影响。研究方法的有效性通过典型问题的流速分布、紊动能量分布以及泥沙浓度分布的计算结果和实验观测结果的比较得到了良好的验证。本研究还探讨了往复流条件下各类相间作用力的时空变化规律及其对悬移质泥沙运动的影响。
A numerical model based on carefully developed theory for two-phase turbulent flows, suspended sediment transport in the boundary layer near seabed is studied. The model is verified through applying to the computation of typical problems with experimental measurements. It is shown that distribution of the flow velocity, the turbulent energy and the sedi- ment concentration within the boundary layer can be well described.