The characteristics of turbulent flows over the two-dimensional dunes has been investigated in two methods, namely measurements with the aid of hot-film anemometer and numerical simulation by k-ε turbulent model.
The computed resuls of k-ε model agrees well with the measured data of mean velocity and turbulence intensities profiles.
Based on the calculated flow field, the motion of the suspended particle traced by Monte-Carlo simulation, in which Markov process model is adopted.
Finally the non-equilibrium dispersion process of suspended particle over the dunes is predicted based on the proposed simulation model. The profiles of the suspended particle concentration over dunes agrees well with the results of experiment, which indicates the applicability of present simulation to the sediment transport in the flow over non-uniform boundaries.