渗流仪影响的二维和三维数值对比研究  

2D and 3D numerical comparative study on the influence of seepage meter

作　　者：陈斌[1] 邬年华[1] 吕辉[1] 

机构地区：[1]江西省水利科学研究院,江西南昌330029

出　　处：《江西水利科技》2016年第1期36-40,共5页Jiangxi Hydraulic Science & Technology

摘　　要：运用计算水力学的基本理论,利用COMSOL地下水模拟软件,分别用二维和三维模拟研究了在不同水流条件下,在测量区放置和不放置渗流仪装置两种情况时,河床界面的压力分布特性和区域潜流通量的大小变化规律.模拟结果表明:三维模拟比二维模拟更能准确地反映出河床界面上的压力分布特性;地表水流速越大,渗流仪结构对局部流态的影响越大;特定地形条件下,地表水流速与潜流通量并不呈正相关关系.By using the basic theory of hydraulics and groundwater simulation software COMSOL, the pressure distribution at riverbed and the changing rule of regional undercurrent flux, which under different conditions of water flow, with and without seepage meter in the measuring zone, was studied using 2D and 3Dnumerical simulation respectively. The result shows that3 Dsimulationcan more accurately reflect the pressure distribution on riverbed, and that the quicker the surface water flow rate, the greater influence the seepage meterhas on the local flow pattern. It also shows that in specific terrain condition, surface water velocity is not positively correlated with the undercurrent flux.

关 键 词：渗流仪 数值模拟 压力分布 潜流通量 

分 类 号：TV698.12[水利工程—水利水电工程]