摘要
针对受植被影响的渠道水流流动特征,建立了有植被作用下的曲线坐标平面二维k-ε双方程湍流数学模型。模型采用两种方法处理植被对水流的影响:拖曳力法和等效阻力系数法。并通过对实验室局部带有刚性植被的弯曲水槽进行模拟研究,得到了水位等值线图、速度矢量场图及测量断面速度,并与实测值进行对比,结果表明:计算结果和实测值符合较好。表明分别采用拖曳力法和等效阻力系数法建立的植被作用下的平面二维数学模型均可对河滩湿地及有植被作用的河道流动进行数值模拟。
The 2-D k - ε turbulence hydrodynamic model for curved open channel flow in curvilinear coordinates was developed to simulate the hydrodynamic behavior of turbulent flow in open channel partially covered with vegetation. In the model, the effect of vegetation on flow was treated both by drag force method and equivalent resistance coefficient method. The validity of simulation result is verified by model test result including the contour line map of water level, velocity vector and sectional velocity distribution. The calculated results show that the depth-averaged numerical model using the drag force method and the equivalent resistance coefficient method to treat the vegetated resistance can be applied to simulate the flow of riverside wetland and river with vegetation.
出处
《水利学报》
EI
CSCD
北大核心
2008年第7期794-800,共7页
Journal of Hydraulic Engineering
基金
国家重点基础研究发展规划(973)项目(2006CB403302)
辽宁省自然科学基金项目(20062170)
关键词
植被
拖曳力法
等效阻力系数法
k-ε湍流模型
SIMPLEC程式
曲线坐标
vegetation
curved open channel
numerical simulation
k-ε turbulent model
SIMPLEC algorithm
drag force method
equivalent resistance coefficient method
curvilinear coordinates
