Abstract
At present, two phase flow of air-pulverized particles (several tens micrometers-several thousands micrometers) can be seen in the equipments used by the industry for producing some kinds of powder, medicine, and so on. The on-line measurement of the particle size distribution is necessary to control the equipment used in the manufacturing processes of particles. In this paper, using the mathematical model and experiments, it will be confirmed that the uniform phenomenon of falling velocities of particles in dilute two phase flow exists. The fundamental study will privide for a fast and simple measuring method of particle size distribution in two phase flow of air-pulverized particles. And, it will be shown that this fundamental study is useful to measure the particle size distribution using the value of the staying time of the flowing particle in a semiconductor laser beam.
