ABSTRACT
We use polystyrene particles of different diameters and call them PSM and PSF particles according to the particle size in the following.Table 1 shows the particle properties and the mass flow rate of particles where σp is the geometric standard deviation of particle size, vt is the terminal settling velocity of a single particle, Ret is the particle Reynolds number of a single particle, D is the orifice diameter and mp is the mass flow rate of particles. We put mp, ρp and σp to be equal to those in measurement by PSM particles using our experiment. We estimated D by the Beverloo’s correlation for PSF particle.
