Numerical Simulation of a Semi-Confined Slot Turbulent Impinging Jet

Abstract

A Realizable k-ε turbulence model in conjunction with a standard wall function has been applied to the prediction of a fully-developed two-dimensional jet impinging within a semi-confined space. A single geometry with a Reynolds number of 10,000 and a nozzle –to-plate spacing of eight diameters has been considered at different inlet boundary conditions. The numerical results, including the time-averaged velocities and the turbulent intensity, have been compared with the experimental data reported by Yoshida (ref 5). It is found that the trends in the axial velocity, the radial velocity and the turbulent intensity are fairly predicted. The fully-developed boundary condition is generally better than the constant velocity boundary condition. The differences between the numerical and experimental results can be attributed to the turbulence model and the treatment of the low Reynolds number zone near the wall.

Numerical Modeling of Venturi Flume

“…Firstly, formulation of the turbulence viscosity has been revised. Secondly, the dissipation rate transport equation is explained based on the equation of transport of the mean-square vorticity [19,20].…”

Computational Fluid Dynamics Modeling of Single Isothermal and Non-Isothermal Impinging Jets in a Scaled-Down High-Temperature Gas-Cooled Reactor Facility

“…Researchers have focused on turbulence around free jets, and they have studied the far-field areas and the near field of the potential core. Theory, experiments, and/or modelling and experiment were the three investigations used in the previous studies [10][11][12][13][14][15][16][17][18][19]. Moreover, numerous studies have been conducted over the last decade focusing on the flow behavior at different conditions in the scaled models for the lower and upper plenum of the HTGR [20][21][22][23][24].…”