| Abstract: | This paper treats the theoretical analysis to obtain the flow characteristics of gas-liquid two-phase mixtures in a vertical and straight pipe. The system of equations governing the gas-liquid two-phase flow field is based upon the multifluid model. The transitions of the gas flow pattern from bubbly to slug flows as well as from slug to churn flows are introduced into the system of the above governing equations. In order to confirm the validity of the present theoretical model, the flow characteristics calculated on the basis of this model have been compared with experimental data measured by changing the pipe diameter and the submergence ratio. As a result, it has been found that the present theoretical model built up in this investigation gives good fit to the measured data. We believe that the simplicity of this pump can make it possible to transport molten iron/steel between different refining processes. But, we also note that the experiments have been performed on a cold model using an air-water system |
