中文摘要：

借助Fluent软件，采用雷诺方程和有限体积法建立连续弯道三维数学模型，并以正弦曲线派生的连续弯道水槽试验结果进行验证，进而采用Fluent软件中的雷诺应力模型对连续弯道水槽试验进行模拟．结果表明：连续弯道内沿程水面呈现出扭曲的现象，凹岸一侧的水位恒高于凸岸一侧，水位横比降明显，最大横比降发生在弯顶偏上游处；连续弯道内水流表层、中层和底层流速沿程分布差别较大，总体上看表层、中层流速大于底层流速；各断面环流旋度大小不同，水面和槽底处环流强度大而水体中部小．

英文摘要：

A three-dimensional numerical model has been established for flow in successive bends based on Reynolds equations and finite volume method of Fluent. The model has been validated with the flow exper- iment of meandering channels with sine-generated curve form. Then, the validated model is used to simu- late the flow movement in successive bends. The results show that the water level along flow direction is distorted; and the water level along the concave bank is higher than that along the convex bank; the veloci- ty along the depth direction is different; the near-bed velocity is smaller; the circulation strength changes with the different parts of flow.