Investigation of dynamic mechanisms near river beds employing a numerical mixed-size movable-bed channel with arbitrary shaped particles

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630211
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Hydraulic engineering
• Research Institution: Chuo University
• Principal Investigator: FUKUOKA SHOJI 中央大学, 公私立大学の部局等, 機構教授 (30016472)
• Co-Investigator(Kenkyū-buntansha): UCHIDA Tatsuhiko 中央大学, 研究開発機構, 機構准教授 (00379900) ; FUKUDA Tomoo 中央大学, 研究開発機構, 機構助教 (00709694)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 石礫河川 / 数値移動床水路 / 河床変動 / 混合粒径 / 粒子形状 / 流体力 / 流砂量 / 可視化

Outline of Final Research Achievements

We developed a numerical movable-bed channel capable of simulating three-dimensional motions of flows and gravel particles in different shapes. Flow and gravel motions and forces exerting them that have been difficult to measure were predicted by numerical movable-bed experiments. The result of the experiments showed that large particles were nearly in rectilinear motions in upper positions on the bed surface and small particles took detours in the lower positions. It was also showed that relatively large particles affected greatly by their shapes in motion and settlement.

Free Research Field

工学