Particle and fluid motion in the RSM/Mintek on-stream particle size analyser

The results of experiments carried out to determine the flow behaviour of a pure fluid through a scaled-up model of the sizer helix are described. The particle behaviour suggested by the fluid velocity profiles was checked by means of high speed cine-films and found to be in good agreement. The motion of both fluid and particles through the sizer helix was shown to be controlled by the distribution of static pressure along the vertical walls of the channel.