کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6413332 | 1629937 | 2014 | 8 صفحه PDF | دانلود رایگان |
- Modeling on grain-size distribution in suspension over sand-gravel bed has been done.
- Stratification and hindered settling effect have been included.
- Effect of particle-particle interaction is included in the computed reference level.
- Effect of different probability is considered in the computed reference concentration.
- The proposed model is verified with existing experimental data.
SummaryIn this study, the grain-size distribution in suspension over a sand-gravel bed in an open channel turbulent flow is investigated from theoretical point of view. On the basis of diffusion equation, a model on grain-size distribution is developed incorporating the effect of stratification and hindered settling due to increased suspension concentration. The hydrodynamic diffusion related to particle-particle interaction is considered in the computation of reference level and the influence of incipient motion probability, non-ceasing probability and pick-up probability of the sediment particles are considered in the computation of reference concentration. Due to inclusion of several factors, the proposed model predicts well the grain-size distribution of suspended load when compared with the experimental data and also shows its prediction superiority with respect to other existing models.
Journal: Journal of Hydrology - Volume 511, 16 April 2014, Pages 640-647