COMPUTATIONAL INVESTIGATION OF DIFFERENT TURBULENT MODELS WHEN PREDICTING AIRFLOW IN AN ENCLOSURE

In the present study, a numerical investigation is carried out for an isothermal case, a hot case and a cold case with FLUENT code. Three turbulence models are considered: the k-epsilon realisable model, the RNG k-epsilon model and the RSM linear model. The obtained results are compared to experiments and show generally a good agreement for the mean velocities and temperatures, but less satisfactory for the turbulent stress. The performance of the RSM model is remarkable. Even if none of the models is able to give the exact experimental pattern on the map of turbulence, the RSM model seems able to predict such configuration.