Air filtration by moving filaments

Abstract

It is shown that droplets may be removed from an air stream by impaction on a number of filaments mounted radially on a central disk which is rotated in a plane at right angles to the direction of flow. Published theoretical and experimental results indicate that particles will be impacted on the filaments when the rate of rotation of the disk is sufficient for the Stokes number of the smallest particle which is to be removed to be equal to at least 12.