Author(s): A. Etemad-Shahidi; A. H. Azimi
Linked Author(s):
Keywords: Numerical simulation; Dense jets; Length scale model; CORMIX
Abstract: In this paper a numerical study for determining the multi-port diffuser design of a dense jet flow is described. Initial dilutions obtained from an extensive series of laboratory experiments were numerically simulated with mathematical models. The experimental results obtained from a dense mixture of gypsum in the Indian Ocean at Richards Bay, South Africa, are simulated with an expert system (CORMIX). CORMIX congregates several routines to analyze and predict initial dilution and use length scales for classification of flow regimes. In general, the results predicted by CORMIX model were relatively in good agreement with the observations. The predicted results of CORMIX model for dense jet flow is well supported regarding ±50% error stipulated by the model. It is found that, the performance of CORMIX model depends on the angle of the crossflow to the vertical plane (φ). In presence of ambient current, when the dense jet is coflow, CORMIX underpredicts the dilution and when the effluent is crossflow (φ=90_o_) CORMIX model is able to predict the initial dilution properly. In counterflow discharges (φ=0_o_) CORMIX overpredicts the dilution.
Year: 2005