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

Pore, M., Holland, D. J., Chandrasekera, T. C., Müller, C. R., Sederman, A. J., Dennis, J. S., Gladden, L. F., & Davidson, J. F. (2010). Magnetic resonance studies of a gas–solids fluidised bed: Jet–jet and jet–wall interactions. Particuology, 8(6), 617-622. https://doi.org/10.1016/j.partic.2010.07.015

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

Meenal Pore ^a, Daniel J. Holland ^a, Thusara C. Chandrasekera ^a, Christoph R. Müller ^b, Andrew J. Sederman ^a, John S. Dennis ^a *, Lynn F. Gladden ^a, John F. Davidson ^a

a Department of Chemical Engineering and Biotechnology, University of Cambridge, Pembroke Street, Cambridge, CB2 3RA, UK
b Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092 Zurich, Switzerland

10.1016/j.partic.2010.07.015

Volume 8, Issue 6, December 2010, Pages 617-622

Received 5 May 2010, Accepted 10 July 2010, Available online 17 October 2010.

E-mail: jsd3@cam.ac.uk

Highlights

Abstract

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.

Graphical abstract

Keywords

Fluidised bed; MRI; Jets; Distributor design

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