Application of a Two Phase Flow Model Based on Local Relative Velocity to Gas-Liquid-Solid Three-Phase Flows

摘要

A two-phase flow model based on local relative velocity, which was previously proposed by the authors, was extended to a model for gas-liquid-solid three-phase flows. The extension was carried out utilizing a hypothetical two-phase flow, which was conceived by removing one of the three phases. In order to examine the usefulness of the extended model, the measured area-averaged volumetric fractions of gas-liquid-solid three-phase bubbly or slug flow in vertical pipes were correlated based on the basic equations of the extended model. The accuracy of the obtained correlation was compared with those of the drift-flux correlation, the correlation based on a multiplier method and the correlation based on a gas-liquid-solid three-phase slug flow model. Consequently, it was confirmed that the extended model gives simpler and more accurate correlations for the area-averaged volumetric fractions of the gas-liquid-solid three-phase flows.