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《Engineering Journal of Wuhan University》 2010-01
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Bend-flow simulation using modified 2D shallow water depth-averaged model

SUN Guangcai1,2,WEI Wenli1(1.Institute of Water Resources and Hydroelectric Engineering,Xi'an University of Technology,Xi'an 710048,China;2.Department of Mathematics,Weinan Teachers College,Weinan 714000,China)  
The purpose of this paper is to present a 2D depth-averaged model for simulating and examining flow patterns in channel bends.In particular,this paper proposes a 2D shallow water depth-averaged model that takes into account the influence of the secondary flow phenomenon through the calculation of the dispersion stresses arisen from the integration of the products of the discrepancy between the mean and the true velocity distributions.The proposed model uses an orthogonal curvilinear coordinate system to efficiently and accurately simulate the flow field with irregular boundaries.The curvature correction turbulence model with effects of streamline curvature based on the standard k-ε turbulence model is used to compute turbulence stresses.As for the numerical solution procedure,the finite volume method with the staggered grid and the SIMPLEC solution method are used to numerically solve the flow governing equations.By using the modified shallow water mathematical model,the behaviors of the flows through a meandering channel have been computed;and the computational results coincide well with the measured data.
【Fund】: 陕西省重点学科建设专项资金项目;; 陕西省教育厅基金项目(编号:09JK649);; 渭南师范学院重点科研基金项目(编号:09YKF003)
【CateGory Index】: TV131
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