基于VOF模型的二维溃坝水流数值模拟研究  

Two-dimensional Numerical Simulation of Dam Break Based on VOF Model

作　　者：邓玉喜 李小纲 梅力方 杨思琪 Deng Yuxi;Li Xiaogang;Mei Lifang;Yang Siqi(School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,Ningxia)

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川750021

出　　处：《陕西水利》2024年第9期1-4,8,共5页Shaanxi Water Resources

基　　金：国家自然科学基金(42064004,12161067);宁夏自然科学基金(2022AAC03070)。

摘　　要：基于Volume of Fluid(VOF)模型对二维溃坝经典案例进行模拟,通过与实验值进行对比,验证VOF模型的计算精度。针对二维溃坝下游有障碍物的情况,研究不同时刻的流场变化情况,与实验结果比较分析,并对障碍物所受到的压力进行分析。通过更改障碍物的位置,研究不同障碍物位置对溃坝水流的影响,不同障碍物位置所受到的压力。结果表明:VOF可以很好地模拟溃坝水流。对于下游有障碍物的溃坝模型,障碍物的最低点所受到的压力最大,最高点所受到的压力最小。障碍物位置距离溃坝水流越远,受到的压力越大,液面变化越剧烈,溃坝水流撞击障碍物行成的水舌高度越高,飞溅的水体也相应增加,水舌撞击右壁面的高度越大。Based on the Volume off Fluid(VOF)model,a two-dimensional dam break classic case is simulated,and the calculation accuracy of the VOF model is verified by comparing with the experimental values.For the case where there is an obstacle downstream of the two-dimensional dam break,the flow field changes at different times are studied,compared with the experimental results,and the pressure on the obstacle is analyzed.By changing the position of the obstacle,the influence of different obstacle positions on the dam break water flow and the pressure on different obstacle positions are studied.The results show that VOF can simulate the dam break water flow very well.For the dam break model with an obstacle downstream,the lowest point of the obstacle is subject to the greatest pressure,and the highest point is subject to the least pressure.The farther the obstacle is from the dam break water flow,the greater the pressure it is subject to,the more drastic the liquid level change,the higher the height of the water tongue formed by the dam break water flow hitting the obstacle,the splashing water body also increases accordingly,and the height of the water tongue hitting the right wall is greater.

关 键 词：溃坝 数值模拟 VOF模型 压力峰值 

分 类 号：TV122.4[水利工程—水文学及水资源]