Abstract
Flow pattern of gas-solid two-phase flow is explained in horizontal and verticalpipelines based on a phase diagram where the pressure drop per unit length along the pipe isplotted against the superficial gas velocity with the mass flow rate of particle as a parameter. Conveyance limits are discussed for the horizontal and vertical upward flows. Dispersed flow, stratified flow, slug flow, plug flow and packed bed flow are qualitatively explained. As tothe method of flow visualization of gas-solid two-phase flow, we briefly review recent progressin laser sheet technique, and in tomographic methods by electrical capacitance and magneticresonance.
