Abstract
Granular flow patterns were investigated in a horizontal cylinder stirred by series of Iong flat blades mounted on a centre shaft. Positron emission particle tracking (PEPT) enabled the agitation process within the bulk of 2-mm glass ballotini to be followed using a tracer identical to the bulk. The axial convective structure seen for a mixer with a single blade was again encountered. Comparisons were made with smaller and bigger tracers. The particles revealed a similar radial velocity structure whatever the tracer size, but axial motion decreased with increased tracer size. The studies aid the interpretation of the PEPT data and also develop insight into the onset of segregation in mixers. (C) 2002 Elsevier Science B.V. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 9-18 |
| Number of pages | 10 |
| Journal | Powder Technology |
| Volume | 123(1) |
| Issue number | 1 |
| Publication status | Published - 18 Feb 2002 |
Keywords
- segregation
- positron emission particle tracking
- dispersion
- convection
- cylindrical mixer