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.

旨在从板块流动状态下进行沉积物传输分析，从各种观点研究了沉积物 - 流体相互作用的基本机制。Sawamoto进行了两种实验。首先，在致密的混合物流中测量施加颗粒上的流体力，并提出了阻力系数的图。在第二个中，观察到陡峭的斜槽中颗粒流的速度分布并制定了剪切应力。在随机波动作用下，塔纳卡分析了湍流结构和床剪应力。应用光谱分析，取得了重大进展。将结果与实验和K-EPSILON模型进行了比较，并检查了可靠性。izumi理论上研究了流量和可移动床之间的相互作用。通过线性理论制定床侵蚀的稳定性，结果表明，沟渠的空间受流体床的稳定性控制。GotoH从两个观察点研究了沉积物颗粒状特性的影响。首先，进行了一系列有关可移动床和盐颗粒之间碰撞的实验。结果用于模拟。其次，通过拉格朗日方法模拟粒子运动。

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)。

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。

木ノ本剛・佐藤栄司・澤本正樹: "斜面上の粒状体に関する研究" 平成9年度土木学会東北支部技術研究発表会講演概要. (印刷中). (1998)

Tsuyoshi Kinomoto、Eiji Sato、Masaki Sawamoto：“斜坡上颗粒材料的研究”1997 年日本土木工程师学会东北分会技术研究报告摘要（1998 年）。