Sediment Transport under Saltation Regime in Turbulent Flow/ Part B: Sensitivity Analysis of Important Parameters of the Model

In the present research, the developed 3D Eulerian-Lagrangian model of the sediment transport in Part A of this series is used to predict the effects of the bed-roughness height, water temperature (viscosity) and density of sediment grains. The selected parameters for the analyses are important both for sediment transport hydraulics and also uncertainties of experimental data. The results indicated that increasing bed-roughness height causes decrease in the saltation characteristics and consequently bed-load transport rate. The effects of water temperature (viscosity) are significant in the range of sand size, and it is necessary to keep it in the control for reducing uncertainties of experimental data. The sediment density has significant effects in both sand and gravel ranges, and thus the use of grains with different density compared to natural sediment can impose significant effects on experimental results.