弯道水流的两步隐式算法研究  

Study of two-step implicit algorithm for 2D flows in a bend channel

作　　者：魏文礼[1] 吕彬[1] 赵小军[1] 刘玉玲[1] 

机构地区：[1]西安理工大学水利水电学院,西安710048

出　　处：《水动力学研究与进展（A辑）》2011年第4期399-405,共7页Chinese Journal of Hydrodynamics

基　　金：陕西省教育厅基金(2010JK761);陕西省重点学科建设专项资金资助

摘　　要：采用优于SIMPLEC算法的两步隐式解法求解二维曲线坐标系下的浅水方程,建立了二维弯道水流数学模型。对流项采用二阶精度的Roe格式离散;物理变量采用适体坐标系下的同位网格布置,网格界面流速由动量插值法计算;紊动黏性系数由修正的k-ε模型确定。采用此模型对弯道内的水流流动进行了数值模拟,计算结果和实测数据吻合较好。In this paper,a two-dimensional shallow model of turbulent flows has been developed in a curvilinear coordinate system.The convection terms are described by the Roe＇s scheme with second-order accuracy.Collocated meshes in curvilinear coordinates are applied into the model,and the velocities at the control mesh surfaces are obtained by momentum interpolation method.The governing equations are solved by the efficient fractional two-step implicit algorithm being superior to SIMPLEC algorithm.The new model has been applied to simulate flows in a bend channel.The comparisons between calculated results and experiment dates are in agreement.

关 键 词：深度平均模型 Roe格式 两步隐式算法 

分 类 号：TV131.21[水利工程—水力学及河流动力学]