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复杂边界及实际地形上溃坝洪水流动过程模拟

夏军强, 王光谦, LIN Bin-liang, 谈广鸣

夏军强, 王光谦, LIN Bin-liang, 谈广鸣. 复杂边界及实际地形上溃坝洪水流动过程模拟[J]. 水科学进展, 2010, 21(3): 289-298.
引用本文: 夏军强, 王光谦, LIN Bin-liang, 谈广鸣. 复杂边界及实际地形上溃坝洪水流动过程模拟[J]. 水科学进展, 2010, 21(3): 289-298.
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XIA Jun-qiang, WANG Guang-qian, LIN Bin-liang, TAN Guang-ming. Two-dimensional modelling of dam-break floods over actual terrain with complex geometries using a finite volume method[J]. Advances in Water Science, 2010, 21(3): 289-298.
Citation: XIA Jun-qiang, WANG Guang-qian, LIN Bin-liang, TAN Guang-ming. Two-dimensional modelling of dam-break floods over actual terrain with complex geometries using a finite volume method[J]. Advances in Water Science, 2010, 21(3): 289-298.
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复杂边界及实际地形上溃坝洪水流动过程模拟

  • 1.

    清华大学水沙科学与水电工程国家重点实验室, 北京, 100084;

  • 2.

    武汉大学水资源与水电工程科学国家重点实验室, 湖北, 武汉, 430072;

  • 3.

    Hydro-Environmental Research Centre, School of Engineering, Cardiff University, CF24 3AA, UK

基金项目: 国家重点基础研究发展计划(973)资助项目(2007CB714106);教育部新世纪优秀人才支持计划资助项目(NECT-10-0619)
详细信息
    作者简介:

    夏军强(1974- ),男,浙江绍兴人,副研究员,博士,主要从事河流动力学方面的研究.E-mail:xiajq@tsinghua.edu.cn

  • 中图分类号: TV122.4

Two-dimensional modelling of dam-break floods over actual terrain with complex geometries using a finite volume method

  • 1.

    State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;

  • 2.

    State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;

  • 3.

    Hydro-Environmental Research Centre, School of Engineering, Cardiff University, CARDIFF, CF24 3AA, UK

Funds: The study is financially supported by the National Basic Research Program of China (No.2007CB714106) and the Program for New Century Excellent Talents in University(No.NECT-10-0619)

摘要

    摘要
  • 摘要: 建立了基于无结构三角网格下采用有限体积法求解的二维水动力学模型,用于模拟溃坝洪水在复杂边界及实际地形上的流动过程。该模型采用Roe格式的近似Riemann解计算界面水流通量,结合空间方向的TVD-MUSCL格式及时间方向的预测-校正格式,可使模型在时空方向具有二阶计算精度。模型中引入最小水深概念,提出了有效的干湿界面处理方法。模拟了理想条件下溃坝水流过程,研究不同最小水深取值对干河床上洪水演进的影响,并用两组简单溃坝水流的水槽试验资料对模型进行验证。采用该模型模拟了实际溃坝洪水的流动过程,所得计算结果与实测资料及已有模型计算结果较为符合。
    Abstract: Based the total variation diminishing(TVD)finite volume method, a two-dimensional hydrodynamic model using unstructured triangularmeshes is developed formodelling dam-break flooding under actual terrain with complex geometries.Details include uses of the Roe's approximate Riemann solverwith the TVD-MUSCL (Monotone Upstream-centered Schemes for Conservation Laws) scheme as well as the procedure of predictor-corrector in time stepping, which can result in a secondrorder accurate elution for dam-break flows in both time and space.The moving boundaryproblem is resolved through the introduction of aminimum water depth concept that can efficiently treat the wetting and drying fronts during the model integration.The effectof a sing different values of the minimum water depth on the simulation of dam-break fbws in the dry river bed is exam fined.We find that the minimum water depth can significantly alter the propagation of flood waves.Model results are also compared to the analytical solution under the idealized conditions, as well as two sets of dam-break data collected from flume experiments.Lastly, the model is validated using a real dam-break case with complex geometric conditions.The model simulation compareswellwith the observations and the other studies.
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    • 参考文献(22)
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出版历程
  • 收稿日期:  2009-05-10
  • 刊出日期:  2010-05-24

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