Cascade of granular flows for characterizing segregation

G. Lumay, F. Boschini, R. Cloots, N. Vandewalle,
Cascade of granular flows for characterizing segregation,
Powder Technology, Volume 234,2013, Pages 32-36,

ISSN 0032-5910,
https://doi.org/10.1016/j.powtec.2012.09.028

 

Cascade of granular flows for characterizing segregation

 

We propose a method using an original apparatus to amplify any segregation from a granular mixture.
The device is a superposition of four Hele Shaw cells for producing a cascade of granular flows that enhances the segregation process.

After the flow cascade, the concentration of each granular species is measured in the different cells.

From these concentrations, a parameter p that characterizes the ability of the mixture to segregate is calculated.
The physical model used to calculate this parameter p is presented.

Finally, the method is validated with a series of experiments performed with common granular materials. Relevant parameters behind segregation are evidenced.