基于Fluent的连续弯道水流三维数值模拟  

Three-dimensional numerical simulation of flow in successive bends based on Fluent

作　　者：吴华莉[1] 陈翠霞[2] 金中武[1] 张小峰[3] 

机构地区：[1]长江科学院河流研究所,湖北武汉430010 [2]黄河勘测规划设计有限公司,河南郑州450003 [3]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2013年第5期599-603,共5页Engineering Journal of Wuhan University

基　　金：国家自然科学基金(编号:51079104);中央级公益性科研院所基本科研业务费项目(编号:CKSF2012030/HL)

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.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.

关 键 词：连续弯道 水流运动 三维数学模型 

分 类 号：TV143[水利工程—水力学及河流动力学]