shows the distribution of the particles inside the screw
conveyor for a 30% by volume fill level and with the screw rotating at
1000 rpm for angles ranging from horizontal to vertical. The particles
are coloured according to their diameter, with the smaller particles
(~2 mm diameter) being light grey and the larger particles (~3 mm
diameter) coloured dark grey. Note that the change inclination was
obtained by changing the orientation of the gravity vector. The screw
therefore remains in the same position and orientation in the pictures
allowing easier comparison of the flow patterns. The first frame, Fig. 3
(a), shows the particle distribution inside a horizontal screwconveyor.
In each subsequent frame the inclination is increased until the screw
conveyor is vertical in the last frame