Effects of sizes and shapes of particles on water and particle motions and bed structures in gravel-bed rivers
| Project/Area Number |
25889050
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Hydraulic engineering
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| Research Institution | Chuo University |
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Principal Investigator |
FUKUDA TOMOO 中央大学, 公私立大学の部局等, 機構助教 (00709694)
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| Project Period (FY) |
2013-08-30 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 石礫河川 / 数値移動床水路 / 河床波 / 分級 / 粒度分布 / 粒子形状 / 流体力 / 粒子衝突 / 河床構造 / 粒子体積割合 |
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| Outline of Final Research Achievements |
We conducted numerical mixed-size gravel movable-bed experiments using a numerical movable-bed channel capable of simulating motions of flow and gravel. To investigate effects of particle sizes on their motions, contact forces of moving particles exerted in collision with movable bed were measured for each particle size in the experiment. The result showed that relatively large particles received more upward contact forces than those of small particles. We also conducted numerical movable-bed experiments with spheres. Effects of particle shapes on gravel motions were investigated by the comparison between gravel and sphere motions. The result showed that a difference of fractional sediment transport rates of gravel was smaller than that of spheres.
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Report
(3 results)
Research Products
(8 results)
