TURBULENCE MODEL PREDICTIONS OF A TWO-PHASE JET.

A two equation turbulence model has been developed for predicting dilute gas-particle flows. This model is based on the (k- epsilon ) turbulence model and treats the gas and particulate phases as separate interacting continua. The presence of the particles increases the dissipation rate in the gas phase. Hence additional terms based on the particle size and loading are added to the traditional k and epsilon equations. The model is used to predict the dusty gas jet in its initial region. The model predicts that the presence of the particles will decrease the spreading rate, the entrainment and the rate of decay of the mean velocity of the jet in agreement with the data.