Simulation of Single and Multiple Impinging Jet Cooling and Comparison With Experimental Data

Abstract

A number of turbulence models offered by the commercial code STAR-CD have been tested on the measurements published in the literature with the objective to compare their capabilities for the simulation of a flow and heat transfer in multiple impinging jets. Numerical predictions of the single jet and jet array air impinging heat transfer have been compared with experimental data. The comparison shows that only turbulence models with additional limiters for turbulence production in the stagnation zone are able to correctly predict the jet impingement heat transfer. Suga’s k-ε turbulence model with Yap-correction, k-ε RNG, V2F and SST turbulence models with different near wall modifications are in acceptable agreement with experiments. The deviations from the experimental data, which provide all the turbulence models, are analyzed.

Numerical Study of Thermal Radiation Effect on Confined Turbulent Free Triangular Jets

“…Therefore, it is expected that the -RNG model gives better results in the regions of the flow where the mean strain rates are high. The performance of the -RNG model of turbulence has been investigated by Knowles and Saddington [11], Gordeev et al [12], Sharif and Mothe [13], Fernández et al [14], Chen [15], Liakos et al [16,17] and Sharif and Mothe [18] in jet flows and all confirmed that the -RNG model can be successfully used to model this type of flows. The -RNG model is numerically robust and faster than the triple transport model and has minimum turn-over time requirements for the calculations [17].…”