天然连续弯道中水流运动的三维数值模拟  

3-D numerical simulation of flow in natural meandering channel

作　　者：吕岁菊[1,2] 冯民权[1] 李春光[2] 

机构地区：[1]西安理工大学陕西省西北旱区生态水利工程重点实验室,陕西西安710048 [2]北方民族大学土木建筑工程学院,宁夏银川750021

出　　处：《水利水运工程学报》2013年第5期10-16,共7页Hydro-Science and Engineering

基　　金：国家自然科学基金资助项目(91230111);宁夏高等学校科学技术研究资助项目(2011JY005);北方民族大学科学技术研究资助项目(2013XYZ026)

摘　　要：为了研究天然河道中水流运动规律和河床演变及泥沙冲淤,建立了适体坐标下修正的紊流水流数学模型.采用有限体积法离散控制方程,并运用SIMPLEC算法计算了黄河沙坡头河段连续弯道的三维水流流场,通过实测资料对计算结果进行了对比分析.结果表明,模型计算值与实测值吻合较好,反映了天然连续弯道水流的基本特性,即水面的水质点向凹岸运动,而近底的水质点向凸岸运动.说明该模型可以用于模拟天然连续弯道的水流运动.In order to study the flow movement, bed evolution and sediment erosion and deposition of the natural rivers, a 3-D numerical model is established in body-riding coordinates by a finite volume method, and SIMPLEC algorithm is used to calculate the 3-D velocity fields. The simulated results of the model are compared with the measured data. The findings indicate that the calculated results agree well with the measured data and reflect the 3- D flow characteristics in the natural meadering channels. The surface water particles will move towards the concave bank, while the bottom water particles will be towards the convex bank. It is shown that the model can be used to simulate the flow movement along the natural meadering channels.

关 键 词：水流运动 紊流数学模型 有限体积法 连续弯道 

分 类 号：TV143.2[水利工程—水力学及河流动力学]