02 March 2001
Silica sand testing zone
A laboratory scale flow rig gave the attached measurements. Silica sand with a mean particle size of 600 nanometers fed vertically downward through the measurement section at a controlled feed rate.
Data emanated from flow rates ranging from 40 to 320 grams per second. A mechanical obstruction in the pipe simulated various flow regimes. This obstruction restricted the solids to a half or quarter of the conveyor cross section. The optical sensor response to solid flow is linear.