Analysis on sediment transport under wave action as particle-fluid interacting system

颗粒-流体相互作用系统波浪作用下泥沙运移分析

• 批准号: 08455225
• 负责人: SAWAMOTO Masaki
• 金额: $ 4.61万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455225/
• 关键词: Sediment Transport; Sheet Flow Regime; Wave Boundary Layer; Channel Inception; Granular Material; 構成則; 移動床; シートフロー

Aiming an application to the sediment transport analysis in sheet flow regime, basic mechanism of sediment-fluid interaction were studied from various view points.Sawamoto carried out two kind of experiments. In the first, fluid force exerting on particles were measured in dense mixture flow and a diagram of drag coefficient was proposed. In the second, velocity distributions of partic1e flow in steep chute were observed and shear stress was formulated.Tanaka analysed turbulent structure and bed shear stress under random wave action. Applying a spectral analysis, significant progress was achieved. The results were compared with experiments and k-epsilon model and reliability was checked.Izumi investigated the interaction between flow and movable beds theoretically. Formulating the stability of bed erosion by linear theory, it was shown that space of gullies is controlled by fluid-bed stability.Gotoh studied the effect of granular characteristics of sediment from two view points. At first, a series of experiments on collision between movable bed and saltationg particle were carried out. The results were utilized in the simulation. Secondly, particle movements were simulated by Lagrangian method.

Sawamoto等人针对薄层水流泥沙运动分析的应用，从不同角度研究了泥沙与水流相互作用的基本机理。首先，测量了稠密混合流中颗粒所受的流体力，并给出了阻力系数图。第二部分观测了陡槽中颗粒流的速度分布，并给出了切应力公式，Tanaka分析了随机波浪作用下的紊流结构和床面切应力。应用光谱分析，取得了重大进展。Izumi从理论上研究了流动与动床的相互作用。用线性理论描述河床冲刷的稳定性，结果表明冲沟的间距受流化床稳定性的控制。后藤从两个角度研究了泥沙颗粒特性的影响。首先，进行了一系列动床与跃移颗粒碰撞的实验研究。并将计算结果用于仿真。其次，采用拉格朗日方法模拟颗粒的运动。

项目成果

田中 仁: "クノイド波動下における層流底面境界層の解析解とその実験的検証" 土木学会論文集. 572/II-40. 85-90 (1997)

Hitoshi Tanaka：“旋线波下层流底部边界层的解析解及其实验验证”日本土木工程师学会会议记录 572/II-40（1997）。

伊達政直・泉典洋・田中仁: "掃流砂・浮遊砂の流出に伴う河口テラスの初期堆積機構" 海岸工学論文集. 44. 591-595 (1997)

Masanao Date、Norihiro Izumi 和 Hitoshi Tanaka：“与基岩和悬浮沉积物流出相关的河口阶地的初始沉积机制” 海岸工程杂志 44. 591-595 (1997)。

神山尚人・佐藤栄司・沢本正樹: "固液混相流における体積濃度の抗力係数への影響" 土木学会年次学術講演会講演概要集II. 51. 566-567 (1996)

Naoto Kamiyama、Eiji Sato 和 Masaki Sawamoto：“固液多相流中体积浓度对阻力系数的影响”日本土木工程学会年度学术会议摘要 II 51. 566-567 (1996)。

田中仁: "波動境界層の準定常性に関する理論及び実験" 土木学会論文集. 593/II-43. 155-164 (1998)

Hitoshi Tanaka：“波边界层准平稳性的理论和实验”日本土木工程师学会会议记录 593/II-43（1998）。

Gotoh, Hitoshi: "Interaction between transported-sediment particle and bed-material particles" Annual Jour.of Hydraulic Eng.Vol.41. 819-824 (1997)

Gotoh, Hitoshi：“输送沉积物颗粒与床质颗粒之间的相互作用”年度水利工程杂志第 41 卷。