COMPARATIVE EVALUATION OF DIFFERENT TURBULENCE MODELS FOR CONFINED IMPINGING AND OPPOSING JET FLOWS

Abstract

A numerical investigation was carried out to predict and compare the fluid flow and heal transfer characteristics of two-dimensional turbulent confined impinging and opposing jet flows. Five low-Reynolds-number k-∊ models and the standard high-Reynolds-number model were used in the simulation. The newly proposed Yap correction was also tested with low-Reynolds-number models in order to investigate its effect on the heat transfer predictions for the impinging jet case. It was found that in some models this correction improves the heat transfer predictions. A comparison is made between the simulation results and the available experimental data for fluid flow and heat transfer for a single slot jet impinging on a flat plate and for flow in the opposing jet case. A parametric study is made for flow and heat transfer characteristics in the opposing jet configuration.