Numerical simulation of vertical buoyant jets discharged from multiport diffusers and the influences of port spacing on the mixing processes

In the present study, the flow and mixing properties of vertical buoyant jets discharged from multiport diffusers are studied numerically. The performances of four different turbulence models are investigated: including the standard k-ε, RNG k-ε turbulence model, k-ω turbulence model, and the k-ω SST turbulence models. The comparisons between the simulated and experimental results demonstrate that the RNG k-ε turbulence model can provide the most accurate predictions. The RNG k-ε model is utilized to carry out additional simulations with different values of port spacing, and the effects of the port spacing is investigated.