Hydraulic Phenomena Accmpanied with Driftwood

伴随浮木的水力现象

• 批准号: 07650600
• 负责人: NAKAGAWA Hajime
• 金额: $ 1.34万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650600/
• 关键词: Driftwood; Diffusion; Debris Flow; Wave Motion; Storm Surge; Voltex Motion; Damming-up of Driftwood; 堰止め; 波動場; シミュレーション

A numerical simulation model has been developed for computing the behavior of driftwood and its dam up process due to jamming between and/or in front of the houses when driftwood debouches into horizontally two-dimensional flow field. Equations of rotational motion of driftwood is evaluated dynamically in the Lagragian form as well as equation of translational motion. The calculation was accomplished by an interacting combination of Eulerian fluid and Lagragian driftwood equations, in which a trubulent diffusivity and rotational angular velocity of the driftwood were also stochastically given. The positions, rotational angles in a group of driftwood, and time change of the number of stopped driftwood between and/or in front of the houses in the experiments are well explained by the calculation. Moreover, the risk of swept away of wooden houses found to be increased by the dam-up experimentally.

当浮木在水平的二维流场中，由于在房屋之间和/或在房屋前的前方堵塞，已经开发了用于计算浮木及其大坝上流过程的行为的数值模拟模型。浮木的旋转运动方程以拉格拉格形式和翻译运动方程式进行动态评估。计算是通过欧拉流体和拉格拉吉亚浮木方程的相互作用组合来完成的，其中还随机给出了浮木的曲折扩散性和旋转角速度。一组浮木中的位置，旋转角度，以及在实验中房屋前和/或在房屋前的停止浮木数量的时间变化，这是通过计算很好地解释的。此外，大坝在实验中发现扫除木屋的风险会增加。

项目成果

Nakagawa Hajime: "Estimation of Hydraulic force Acting on the Driftwood and Its Flow Behavior and Process of Damming up" Research Report for Hydraulic Committee of JSCE. 55-73 (1996)

Nakakawa Hajime：“作用于浮木的水压力及其流动行为和筑坝过程的估计”为日本土木工程师协会水利委员会提供的研究报告。

木村一郎・細田 尚・他: "平面二層モデルによる複断面開水路流れの水平渦運動解析" 水工学論文集. 第40巻. 699-704 (1996)

Ichiro Kimura、Nao Hosoda 等人：“使用平面两层模型进行多截面明渠流的水平涡运动分析”《水利工程杂志》，第 40 卷，699-704 (1996)。

Kimura Ichiro, Hosoda Takashi and et al.: "Numerical Simulation of Horizontal Vortices in a Compound Open Channel Flow" Annual Jour.of Hydraulic Engineering. Vol.40. 699-704 (1996)

Kimura Ichiro、Hosoda Takashi 等人：“复合明渠流中水平涡流的数值模拟”水利工程年度杂志。

Nakagawa, H., K. Inoue, M. Ikeguchi and T. Tsubono: "Behavior of Driftwood and the Process of Its Damming up" Jour. of Hydroscience and Hydrarulic Engineering. Vol. 13 No. 2. 55-67 (1995)

Nakakawa, H.、K. Inoue、M. Ikeguchi 和 T. Tsubono：“浮木的行为及其筑坝的过程”Jour。

中川 一・他: "計画土石流の設定と避難計画" 京都大学防災研究所年報. 第39号B-2. 347-371 (1996)

Nakakawa, Hajime 等：“泥石流设置和疏散计划”，京都大学防灾研究所年度报告第 39 B-2 号（1996 年）。