Abstract
This study deals with a simultaneous visualization technique and image analysis of particle/bubble behavior on its position of the center of gravity, shape, and attitude of motion, in addition to flow field around it. In the multiphase flow field, the interaction between a particle/bubble and surrounding fluid or two-way effect is very important to understand complex phenomena of dispersed flow. Therefore, simultaneous visualization of both particle/bubble motion and surrounding flow has been requested. In addition, determination of the 3D-position of the center of gravity of the particle/bubble and the distance between its center of gravity and the plane of velocity field obtained has been required. In the study, such a visualization technique and image analysis namely Moving Object-Flow Image Analyzer (MOFIA) was developed to determine the distance. Furthermore, image analysis for obtaining particle/bubble behavior on its shape and attitude was settled in order to obtain basic data for discussing the essential interaction. The results of measurement made using MOFIA for both a single particle and two particles in stagnant water show that adequate data are obtainable for discussing the interaction based on the composite of two images of particle/bubble and flow field.
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