Magnetic resonance studies of a gas–solids fluidised bed: Jet–jet and jet–wall interactions

✍ Scribed by Meenal Pore; Daniel J. Holland; Thusara C. Chandrasekera; Christoph R. Müller; Andrew J. Sederman; John S. Dennis; Lynn F. Gladden; John F. Davidson

• Publisher: Elsevier
• Year: 2010
• Tongue: English
• Weight: 392 KB
• Volume: 8
• Category: Article
• ISSN: 1674-2001
• DOI: 10.1016/j.partic.2010.07.015

✦ Synopsis

Magnetic resonance imaging (MRI) gave images of air jets from orifices in the distributor plate of a bed of poppy seeds. Attention focused on two features:

(1) The interaction between nearby vertical jets from two, three or four orifices;

(2) Wall effects, where one or more orifices created vertical jets near the vertical wall of the cylinder containing the particle bed.

The results show that nearby jets are mutually attracted. Likewise a jet near a wall bends out of the vertical, towards the wall. For multiple adjacent jets, the jet lengths show dependence on orifice layout: the lengths are in reasonable agreement with published measurements, by other methods, for single jets. The MRI gives three-dimensional images of the single jets and of multiple jets, separate or merging.