PERFORMANCE COMPARISON OF A BUOYANCY-MODIFIED TURBULENCE MODEL WITH THREE LRN TURBULENCE MODELS FOR A SQUARE CAVITY

Abstract

A buoyancy-modified four-equation turbulence model is applied to predict an air-filled square cavity, along with the low-Reynolds-number turbulence model of Ince and Launder (IL), and the three- and four-equation models of Hanjalic (H3E and H4E). The predictions of the different models are compared with one another and with some published experimental data. The results demonstrate that the present model can capture both the mean and fluctuating turbulent quantities in this elementary type of flows more accurately than the other three models. Its predictions for the local Nusselt numbers are also in better agreement with the data. Among the other three models, it is found that the predictions of the H4E model are generally in better agreement with the data than the IL and H3E models.