Volume 50, Number 3, May I 2000
|Page(s)||319 - 325|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||01 September 2002|
Dynamics of mixing and segregation processes of grains in blender by NMR imaging investigation
Centre de Recherche sur la Matière Divisée,
UMR 6619 CNRS
Université d'Orléans - 45071 Orléans cedex 2, France
2 Laboratoire de Physique Pharmaceutique, UMR 8612 CNRS Université Paris XI - 92296 Châtenay-Malabry cedex, France
3 Laboratoire de Mécanique Sols-Structures-Matériaux, UMR 8579 CNRS Ecole Centrale Paris - 92295 Châtenay-Malabry cedex, France
Corresponding author: email@example.com
Accepted: 21 February 2000
Tridimensional Magnetic Resonance Imaging (MRI) was used to study the mixing and segregation processes in a Turbula mixer using binary mixtures of sugar beads. A segregation index S was defined to study the homogeneity and the kinetics of the mixing/segregation processes. When the ratio of bead diameters is approximately 1, the mixing process is observed, but segregation occurs as soon as is greater than 1.1. Moreover, the segregation appears as a faster process than mixing in the Turbula blender.
PACS: 45.70.Mg – Granular flow; mixing, segregation and stratification / 81.05.Rm – Porous materials; granular materials / 87.61.-c – Magnetic resonance imaging
© EDP Sciences, 2000
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