Application of K-E Model on the Numerical Simulation of a Semi-confined Slot Turbulent Impinging Jet

To evaluate the predictive capabilities of K-E turbulence models, three turbulence models (the standard K-E model, the RNG K-E model and the Realizable K-E model) in conjunction with a fully-developed boundary condition and a standard wall function were applied to the prediction of a fully-developed two-dimensional jet impinging within a semi-confined space. The convection term and the dissipation term in the control equations were discretized by Second Order Upwind scheme and Central Differencing scheme. The numerical results, including the time-averaged velocities and the turbulence intensities, were compared with the experimental data reported by Yoshida. It was found that the numerical results were in qualitative agreement with the experimental data. The differences between the numerical and experimental results can be attributed to the fundamental assumptions of the turbulence models, experimental error and the treatment of the low Reynolds number zone near the impingement wall.