Numerical Simulation Of Bank And Center Discharge Of The Meandering Channel

In this paper, VC++ and CFD software are used to simulate numerically the bank and center discharge of the meandering channel in laboratory in turbulence. The flow field and concentration field are calculated.First of all, through solving Possion partial differential equation, change from Cartesian coordinate to fitted boundary coordinate is realized and regular rectangle grids are built.Then, based on fitted boundary coordinate system and depth average theory, the Ω— Ψequations, standard k-ε turbulence model, concentration equation and appropriate boundary conditions are adopted to set up mathematic model. In this way avoid pressure infection. And wall function is applied to settle the two banks. Finite Analytic Method is used to build discrete model and these equations are solved by TDMA. The whole process is programmed by VC++. The calculated results accord with the document data and laboratorial data.Finally, CFD software FLUENT is adopted to simulate the same situation. The result calculated by FLUENT accord with by C++. In addition, it is used to compute flow field and concentration field in different velocities of the bank discharge, the vortex is found near by the discharge outlet.