Pneumatic Conveying of Solids : Part 2, On Slip Velocities and Interaction between Wall and Particles in Vertical Lines

抄録

In part 2 of this series it is attempted to describe how the slip velocity in vertical lines depends on the tube diameter the transport air velocity and the particle property. The slip velocities were determined by direct measurement of particle velocities at a comparatively small concentration of solids, using combination of a rotating shutter and a photographic measurement of particle trajectories. From these experimental results of other investigators could satisfactorily be represented by the authors' expression and that the friction factors in both horizontal and vertical conveying prove to be almost the same at high air velocity.