A parametric study of axial segregation in a rotating cylinder.

Conference · Thu Jan 01 04:00:00 EST 2004

OSTI ID:977927

Bielenberg, J R ^[1]; Gladysz, G M ^[2]; Graham, Alan L

---

1. James R.
2. Gary M.

When a cylindrical container, partially filled with a binary granular mixture of particles that differ in size or density, is rotated around its axis, a spontaneous segregation of the two granular components may occur. In order to better understand this phenomena, we have carried out an experimental study probing the effect of average particle size and relative size difference between particles on the onset of segregation. The experimental study is followed by a novel scaling analysis that relates the deterministic, convective driving force for particle segregation to the randomizing diffusional driving force present in these systems through the definition of an axial granular Peclet number. This Peclet number based approach will forgo some of the difficulties inherent in full-scale dynamic simulations, but will still allow us to determine the effects of system parameters on the final steady-state that is achieved. Values of this granular Peclet number are shown to successfully correlate with segregation behavior in the present experiment results, as well as in comparable results present in the literature.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 977927
• Report Number(s): LA-UR-04-7887
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CYLINDERS
GRANULAR MATERIALS
PARTICLE SIZE
ROTATION
SEGREGATION