Bimodal Bed Load Transport Characteristics under the Influence of Mixture Ratio
Abstract
:1. Introduction
2. Methods
2.1. Flume System Used in the Experiment
2.2. Sediment Used in Experiments
2.3. Monitoring System of the Amount of Bed Load
2.4. Image Collection of Particles and Turbulence Measurement
2.5. Experimental Design
3. Results
3.1. Key Parameters
3.2. Experimental Results
4. Discussion
4.1. Correlation of the Motion Characteristics of the Bed Load Particle with Turbulence Features
4.2. Three Incipient Motion Modes of Coarse Sediments in the Bed Load Mixture
4.3. Distinct Motion Properties of the Coarse and Fine Particles near the Bed
4.4. Influence of Bed-Material Mixture Ratio on the Bed Load Transport Rate
4.5. Effects of Different Particle Sizes on the Non-Uniform Bed Load Transport
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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No. | Fine Sand Diameter df/mm | Coarse Sand Diameter dc/mm | dc/df |
---|---|---|---|
1 | 0.6~0.9 | 3.0~4.0 | 4.67 |
2 | 0.6~0.9 | 5.0~6.0 | 7.33 |
3 | 1.2~2.0 | 6.0~8.0 | 4.35 |
4 | 2.0~3.0 | 6.0~8.0 | 2.80 |
5 | 2.0~3.0 | 8.0~10.0 | 3.60 |
Sets | Groups | Mixture Ratio η | Flow Discharge Q/(m3s−1) | Fr | Sample Sand Diameter d/mm | |
---|---|---|---|---|---|---|
Coarse Sands | Fine Sands | |||||
Set 1 | Case 1~3 | 6:4 | 0.016~0.027 | 0.79~0.95 | 6~7 | 2.5~4 |
Case 4~6 | 6:4 | 0.016~0.027 | 0.69~0.8 | 8~10 | 2~3 | |
Case 7 | 6:4 | 0.027 | 0.8 | 8~10 | 2~3 | |
Set 2 | Case 1~3 | 4:6 | 0.027~0.030 | 0.72~0.76 | 8~10 | 2~3 |
Case 4~6 | 4:6 | 0.025~0.034 | 0.70~0.78 | 6~7 | 2.5~4 | |
Set 3~13 | Each Set (Case1~6) | 10:0 (9:1~0:10) | 0.024~0.034 | 0.86~0.95 | 8~10 | 2~3 |
Set 14~24 | Each Set (Case1~6) | 10:0 (9:1~0:10) | 0.024~0.034 | 0.86~0.95 | 6~8 | 2~3 |
Set 25~35 | Each Set (Case1~3) | 10:0 (9:1~0:10) | 0.020~0.024 | 0.82~0.88 | 5~6 | 0.6~0.9 |
Set 36~46 | Each Set (Case1~3) | 10:0 (9:1~0:10) | 0.016~0.020 | 0.92~0.96 | 3~4 | 0.6~0.9 |
η | Φc | φ |
---|---|---|
7:3 | 0.3623 | 0.1097 |
6:4 | 0.6549 | 0.4874 |
5:5 | 0.6866 | 0.6080 |
4:6 | 0.8932 | 0.6999 |
3:7 | 1.0000 | 0.7791 |
2:8 | 0.4624 | 0.8146 |
1:9 | 0.3623 | 0.8706 |
0:10 | 0.0000 | 1.0000 |
Flow condition: | Q = 0.026m3/s, Fr = 0.85 |
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Liu, M.; Zhu, Y.; Zhou, Z.; Sun, D. Bimodal Bed Load Transport Characteristics under the Influence of Mixture Ratio. Water 2023, 15, 487. https://doi.org/10.3390/w15030487
Liu M, Zhu Y, Zhou Z, Sun D. Bimodal Bed Load Transport Characteristics under the Influence of Mixture Ratio. Water. 2023; 15(3):487. https://doi.org/10.3390/w15030487
Chicago/Turabian StyleLiu, Mingxiao, Yongjie Zhu, Zixi Zhou, and Dongpo Sun. 2023. "Bimodal Bed Load Transport Characteristics under the Influence of Mixture Ratio" Water 15, no. 3: 487. https://doi.org/10.3390/w15030487