基于RANS-VOF模型的溃坝水流精细化模拟研究  

Study on high-precision simulation of dam-break flows based on the RANS-VOF model

作　　者：张俊翔 崔嘉宇 苏瑞奇 赵刚 Zhang Junxiang;Cui Jiayu;Su Ruiqi;Zhao Gang(Kunshan Water Affairs Bureau Water Comprehensive Management Center,Kunshan 215301,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]昆山市水务局水事综合管理中心,江苏昆山215301 [2]南京水利科学研究院,江苏南京210029

出　　处：《吉林水利》2025年第2期1-5,共5页Jilin Water Resources

基　　金：江苏省生态环境监测科研基金项目(24A01)。

摘　　要：针对溃坝水流的运动特征提出一种基于RANS-VOF模型的溃坝水流精细化模拟方法。该方法采用结构化网格离散计算区域,并通过流体体积法追踪自由液面,实现了溃坝水流的三维精细化模拟,不仅能保证数值格式的稳定性,又能够有效模拟溃坝水流的复杂流态。为验证模型的有效性,选取矩形水槽溃坝试验和过驼峰溃坝水流试验两个典型溃坝算例进行数值验证,计算结果表明,该模型具有良好的稳定性,未出现明显的数值振荡;通过与实测数据对比,发现构建的模型能够准确捕捉溃坝水流的自由液面,计算水位与实测数据吻合较好,具备较好的干湿边界处理能力。To addresses the movement characteristics of dam-break flow,this paper proposes a high-precision simulation methodology based on the RANS-VOF(Reynolds-Averaged Navier-Stokes-Volume of Fluid)model.The method employs structured grids to discretize the computational domain and utilizes the VOF approach for tracking the free surface,thereby achieving three-dimensional,high-fidelity simulations of dam-break flows.The proposed model not only ensures numerical stability but also effectively simulates complex dam-break flow patterns.To validate the effectiveness of this model,two benchmark experimental cases were selected for numerical verification:a rectangular tank dam-break test and a hump-over dam-break flow experiment.The simulation results indicate that the model exhibits excellent stability without significant numerical oscillations.Comparisons with measured data reveal that the constructed model can accurately capture the free surface of the dam-break flow,showing good agreement between the simulated water levels and the observed data.Additionally,the model demonstrates robust capabilities in handling dry-wet boundaries.

关 键 词：溃坝水流 数值模拟 模型验证 

分 类 号：TV143[水利工程—水力学及河流动力学]