摘要
本文对经典的SIMPLE方法进行了改进,在模拟具有自由表面的湍流问题时,摒弃了对自由表面常作的“刚盖”假定。通过求解k-ε模式闭合的三维雷诺方程及自由表面运动方程,得到了渠道槽沟区水流速度、涡粘性系数、湍流切应力、湍动能的分布规律和自由水面位置的变化规律,计算结果与实测值十分吻合。
A three-dimensional model based on Reynolds equations with the k-e turbulence closure is presented which can be used to predict the surface water flow in open channels. Instead of using 'rigid lid' approximation, the solution to the free surface equation is implemented in the velocity-pressure iterative procedure developed on the basis of the SIMPLE method. The velocity, eddy viscosity coefficient, turbulent shear stress, turbulent kinetic energy and elevation of the free surface over the trenches dredged in the main channels can be obtained from computation. It has been shown that the computed results are in good agreement with the experimental values.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
1990年第3期41-48,共8页
Chinese Journal of Hydrodynamics
关键词
三维
明渠
模拟
渠道
槽沟
流动
three-dimensional surface water flow, dredged trenches, k-ε turbulence model, numerical simulation.
