Comparison of three buoyancy extended versions of the k-ε-t'2 model in predicting turbulent plane plume

In the present paper, turbulent plane plume in a quiescent ambience has been numerically studied using three different versions of the buoyancy extended k-epsilon-(t(′2)) over bar model. The performance of models is analysed by means of a detailed comparison between the predictions and the experimental observations reported in the literature. In addition, the predictions by the Reynolds stress and the heat flux transport (RSHFT) model reported in the literature are also included in the comparison to examine the effectiveness of k-epsilon-(t(′2)) over bar models relative to the higher order RSHFT model. The comparison shows that the mean flow quantities predicted by all the models agree well with the experimental observations. However, considerable differences are observed in the predicted turbulent quantities. (C) 2003 Elsevier Inc. All rights reserved.