Numerical prediction of mixed turbulent airflow within a cavity using various turbulence models.

The overall objective of the present work is to evaluate the performance of three turbulence models, with a view to predicting characteristics of airflow within an anisothermic cavity. The standard K-c. model, the Renormalisation Group model (RNG) and the Reynolds stress model (RSM) are used in conjunction with the Fluent code. The accuracy and the relative performance of the three models are evaluated by comparing their numerical results with experimentally obtained data. This comparison is made for the constant flow rate of a twodimensional turbulent mixed convective airflow. The results obtained are examined by comparing the parameters of velocity, turbulence energy and temperature. The general agreement between the models and the experimental results is quite good although significant differences were observed in some flow zones.