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題 名 | 二維有限體積模式分析潰壩水流=Two-Dimensional Finite Volume Model for Dam-Break Unsteady Flow |
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作 者 | 陳樹群; 趙棣華; 沈學汶; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 9:3 1997.09[民86.09] |
頁 次 | 頁439-448 |
分類號 | 443.9 |
關鍵詞 | 潰壩分析; 有限體積法; 不規則網格; 黎曼問題; Osher數值方法; Dam-break analysis; Finite volume method; Unstructured grid; Riemann problem; Osher scheme; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究所發展的二維變量流模式,係採用有限體積法配合不規則網格來模擬河川及流域系 統。模式主要特色在於使用積分法則來離散微分方程組,並以高精度的Osher 數值方法通過黎曼問 題的近似解來估算各網格邊界上之水量及動量通量。本模式可用於處理流域集水區內之(1)洪氾平 原及濕地之漸乾及漸濕過程;(2)潰壩所產生的不連續性震波(3)可同時用於計算亞臨界流與超臨 界流;(4)其他如主支流會合、水流流經堰壩涵管橋墩等水工結構物之水理演算等。本文主要重點 係模擬兩組不同潰壩水流所產生之震波,證明有限體積法配合Osher數值方法為一具有高解析度的 數值方法。 |
英文摘要 | This paper presents a two-dimensional unsteady flow model is presented in this paper, RBFVM- 2D, which is based on the finite volume method combined with unstructured triangle and quadrilateral grids in a river basin system. One of the attractive features of this model is to treat the calculation of the mass and momentum flux across each side of elements as a Riemann problem which is solved using the Osher scheme. This feature enables this model to deal with: (1) the wetting and drying processes for floodplain and wetland studies, (2) the dam-break phenomena involving discontinuous flows, (3) the subcritical and supercritical flows, and (4)other cases, such as computations of tributary inflows and regulated flows through gates, weirs and culverts or bridges. Sample applications of this model to two dam break problems showed |
本系統中英文摘要資訊取自各篇刊載內容。