| 局部断面收缩的溃坝水流三维数值模拟 |
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| 引用本文： | 戎贵文,袁岳,肖柏青,向英奇.局部断面收缩的溃坝水流三维数值模拟[J].水利水电科技进展,2015,35(6):20-25. |
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| 作者姓名： | 戎贵文 袁岳 肖柏青 向英奇 |
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| 作者单位： | 1.232001 安徽 淮南 安徽理工大学地球与环境学院; 2.210098 江苏 南京 水文水资源与水利工程科学国家重点实验室,232001 安徽 淮南 安徽理工大学地球与环境学院,232001 安徽 淮南 安徽理工大学地球与环境学院,232001 安徽 淮南 安徽理工大学地球与环境学院 |
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| 基金项目： | 国家自然科学基金(51579002,51309002);安徽省高等学校省级自然科学研究重点项目(KJ2013A094) |
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| 摘 要： | 为研究局部断面收缩对溃坝水流传播的影响,采用压力隐式算子分割法求解雷诺时均方程和RNG k-ε紊流模型,建立了模拟三维局部断面收缩情况下溃坝洪水演进过程的数学模型。采用有限体积法对溃坝水流的控制方程进行离散,利用流体体积函数法处理自由水面,物理变量采用交错网格布置,对局部断面收缩溃坝水流进行数值模拟计算,模拟结果与实体模型试验结果吻合较好。利用该模型研究了溃坝洪水负波的形成和传播过程,得到了负波形成和传播的规律以及溃坝水流的水位变化特征。
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| 关 键 词： | 溃坝水流 局部断面收缩 负波 水位 数值模拟 |
Three-dimensional numerical simulation of dam-break water flow with local cross-section reduction |
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| RONG Guiwen,YUAN Yue,XIAO Baiqing and XIANG Yingqi.Three-dimensional numerical simulation of dam-break water flow with local cross-section reduction[J].Advances in Science and Technology of Water Resources,2015,35(6):20-25. |
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| Authors: | RONG Guiwen YUAN Yue XIAO Baiqing and XIANG Yingqi |
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| Affiliation: | 1. College of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China; 2. State Key Laboratory of Hydrology Water Resources and Hydraulic Engineering, Nanjing 210098, China,College of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China,College of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China and College of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China |
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| Abstract: | A three-dimensional mathematical model that simulates the dam-break flood routing process that occurs during local cross-section reduction has been built to investigate the effects of local cross-section reduction on dam-break flow propagation. By calculating Reynolds-averaged Navier-Stokes equations basing on pressure implicit with splitting of operators(PISO), the model is built on the basis of the RNG turbulence model. The governing equations of dam-break flow are discretized with the finite volume method, the free surface flow is dealt with using the fluid volumetric function approach. The physical variables are arranged on a staggered grid, and then the values of dam-break flow with local cross-section reduction are simulatively calculated. The simulation results are in agreement with physical model test results. The formation and propagation process of negative waves in a dam-break flood were examined with the model. The formation and propagation laws of negative waves as well as the variation characteristics of the water level were obtained. |
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| Keywords: | dam-break water flow local cross-section reduction negative wave water level numerical simulation |
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