摘要
本文从悬移质扩散方程出发,根据粘性流体的非滑移条件,考虑了泥沙颗粒周围有部分流体随泥沙一起运动的特点,得到了一个新的平衡情况下恒定均匀二维明渠流的悬移质运动的基本方程,即其中m。等于泥沙体积和随泥沙颗粒一起运动的水体体积之和与相应体积内的泥沙体积之比.它与泥沙颗粒的大小,形状及含沙量有关.根据上述方程得到的含沙量沿垂线的分布公式,不仅较好地克服了Rouse公式中存在的水面含沙量为零、床面含沙量为无穷大的两大缺陷,而且其结果与实测资料较为符合,特别是近底含沙分布与实际情况十分吻合.
After discussing the Rouse Equation of sediment concentration distribution and considering the flow characteristics of sediment- laden flow, a new differential equation of suspended sediment concentration distribution is developed. Based on the new equation, the prediction of sediment concentration along a vertical line dose not yield zero concentration at the water surface and infinite concentration at the bed as estimated by Rouse equation. Besides, the predicted concentration at the bed is in close agreement with that of measurements.
出处
《水利学报》
EI
CSCD
北大核心
1990年第10期41-48,共8页
Journal of Hydraulic Engineering
