PARTICLE IMAGE VELOCIMETRY - SIMULTANEOUS 2-PHASE FLOW MEASUREMENTS

A method using particle image velocimetry to study pneumatic conveyanc e of a solid phase is presented. The technology enables simultaneous v elocity measurements of both phases by isolating the measurements of e ach phase. The image processing which implements the phase separation is simple, but has limitations. The method is restricted to low solid densities to avoid a quality drop in the measurements, and cross talk between measurements of the two phases. A discussion based on numerica l and experimental results concludes on the working range of the metho d and demonstrates measurements of slip velocity.