title: Rapid two-dimensional imaging of bubbles and slugs in a three-dimensional, gas-solid, two-phase flow system using ultrafast magnetic resonance.
abstract: Ultrafast magnetic resonance has been applied to measure the geometry of bubbles and slugs in a three-dimensional gas-solid two-phase flow. A bed of particles of diameter 0.5 mm were fluidized with gas velocities in the range of 0.08-0.26 m/s. Bubbles were imaged in transverse as well as vertical planes with an acquisition time of down to 25 ms and a spatial resolution down to 1.7 mm. Owing to the ultrafast character of these measurements, it is not only possible to evaluate correlations, e.g., for the bubble diameter, but also evaluate models of complex hydrodynamic phenomena, such as the splitting and coalescence of bubbles.
authors.affiliation: Department of Chemical Engineering, University of Cambridge, Pembroke Street, Cambridge CB2 3RA, United Kingdom.
authors.forename: C R
authors.initials: CR
authors.lastname: Müller
authors.forename: D J
authors.initials: DJ
authors.lastname: Holland
authors.forename: J F
authors.initials: JF
authors.lastname: Davidson
authors.forename: J S
authors.initials: JS
authors.lastname: Dennis
authors.forename: L F
authors.initials: LF
authors.lastname: Gladden
authors.forename: A N
authors.initials: AN
authors.lastname: Hayhurst
authors.forename: M D
authors.initials: MD
authors.lastname: Mantle
authors.forename: A J
authors.initials: AJ
authors.lastname: Sederman