Effects of sizes and shapes of gravel particles on sediment transports and bed variations in a numerical movable-bed channel
Effects of sizes and shapes of gravel particles on sediment transports and bed variations in a numerical movable-bed channel
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DOI：
10.1016/j.advwatres.2014.05.013
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发表时间：
2014-10
影响因子：
4.7
通讯作者：
S. Fukuoka;T. Fukuda;T. Uchida
中科院分区：
文献类型：
--
作者：
S. Fukuoka;T. Fukuda;T. Uchida
本文介绍了一种能够模拟不同形状的水流和砾石颗粒三维运动的数值动床槽道。首先，将数值流道与砾石颗粒输运的固定床流道实验结果进行对比试验。通过与实验室实验结果的比较，验证了模拟粒子运动的正确性。其次，进行了球形颗粒和砾石颗粒的动床数值实验。这些试验结果清楚地阐明了大颗粒和小颗粒之间的运动差异，砾石颗粒形状对输沙速率的影响，以及起动和沉降时的水动力和接触力。
The paper presents a numerical movable-bed channel capable of simulating three-dimensional motions of flows and gravel particles in different shapes. At first, the numerical channel was tested against results of fixed-bed channel experiments in which gravel particles were transported. Simulated particle motions were validated in comparison with those in the laboratory experiment. Next, numerical movable-bed experiments with sphere particles and gravel particles were conducted. The results of these experiments clearly elucidated the difference in motion between the large and the small particles, effects of shapes of gravel particles on sediment-transport rates, and hydrodynamic forces and contact forces at incipient motion and at settling.