1995 Volume 111 Issue 4 Pages 245-251
In order to solve a flow problem using the conservation equations, it is necessary to give a set of constitutive equations. It is the purpose of this work to investigate the constitutive equations for onedimensional gas-liquid-solid three-phase flow in vertical pipes with a mixture model. In this paper, we discuss average velocities and average volumetric fractions of each phase experimentally by applying a drift flux model.
For the gas phase, using the drift flux model based on the mixture center-of-volumetric velocity (mixture volumetric flux), the distribution parameter was examined by adapting the drift velocities which several investigators proposed for gas-liquid two-phase flow systems. Furthermore the analysis took into account the effect of the radial distributions of local phase velocities and local volumetric fractions on the distribution parameter for bubbly flow regime. For the solid phase, the similar parameter to the distribution parameter was correlated by using a flow model based on the mixture center-ofmass velocities. Then concerning the average volumetric fractions of gas and solid phases, calculated results by using the obtained correlations agree with the experimental data.
