Abstract
Fully developed three-phase flow in a vertical pipe was investigated. The experiments were carried out by using air, water and spherical particles of 6.12mm in diameter. The ceramic particles and the 26 mm I.D. test pipe used were the same as those used in Part 1 of this study. The ranges of volumetric fluxes of air, water and particles were 0.50≤jG≤8.0 m/s, 0.50≤jL≤1.2m/s and 0.0075≤jMs≤0.060m/s, respectively. Measurements of the particle velocities and large gas bubbles were recorded, and the volume fractions of each phase were determined. The pressure drop was also measured.
Regarding the particle velocity, an empirical model was proposed to correlatethe velocity of coarse particles with the three-phase flow parameters, i.e., such as the particle size, the volumetric fluxes and the densities of each phase, and so on. This model, together with some correlations suitable for gas-liquid or liquid-solid two-phase flow, can lead to a prediction of the volume fractions of each phase and to the determination of the three-phase pressure drop. Concerning the volume fractions and the pressure drop, comparisons were made between the experimental data and calculations not only for the above-mentioned data and model of the authors but also for those of other investigators.
