Magnetic tracer-particle tracking in a fluid dynamically down-scaled bubbling fluidized bed

Sette, Erik; Pallarès, David; Johnsson, Filip; Ahrentorp, Fredrik; Ericsson, Anders; Johansson, Christer

doi:10.1016/j.fuproc.2015.06.016

Cited by 36 publications

(18 citation statements)

References 47 publications

(86 reference statements)

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“…so as to obtain a smooth time series. Further details on the Kalman filtering procedure can be found in the work by Sette et al [52].…”

Section: Methodsmentioning

confidence: 99%

“…The printed circuit boards of the sensor module were designed to facilitate precise calibration and mounting of each individual sensor module. The sensor modules were calibrated (details of the calibration procedure are provided elsewhere [52]) prior to conducting measurements, so as to avoid the risk of any cross-axis effect disturbing the interpretation of the measurements.…”

Section: -7 CMmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…MPT has been applied to multiphase systems [49][50][51][52]. Using MPT, a tracer particle that fluid-dynamically resembles a fuel particle can be tracked in a 3-dimensional bed, yielding highly resolved information about the particle trajectory and rotation [52], and exhibiting better performance and wider scope than X-ray tomography at a much lower cost. Despite the fact that various research groups have applied MPT to particle tracking in fluidised beds in recent years [46,[49][50][51][52][53][54], the literature on this topic is still scarce and is limited to pseudo-2-dimensional beds or narrow reactors and lacking any application of fluid-dynamical scaling laws, except in the initial work by the authors [52], which proved the feasibility of using MPT in beds operated with particles that fulfilled fluid dynamic scaling.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the work relies on dynamic measurements of the fuel mixing within the bed, obtained from direct measurements of the velocity field (direction and magnitude) of the fuel. Taking departure in the proof of concept of the MPT technique combined with fluid-dynamical down-scaling [52], the present work reports unique experimental data on fuel mixing dynamics which, as added value, are quantitatively relevant for hot large-scale fluidised bed units.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Magnetic tracking of a fuel particle in a fluid-dynamically down-scaled fluidised bed

Köhler

Pallarès

Johnsson

2017

Fuel Processing Technology

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“…so as to obtain a smooth time series. Further details on the Kalman filtering procedure can be found in the work by Sette et al [52].…”

Section: Methodsmentioning

confidence: 99%

Section: -7 CMmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Magnetic tracking of a fuel particle in a fluid-dynamically down-scaled fluidised bed

Köhler

Pallarès

Johnsson

2017

Fuel Processing Technology

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Magnetic particle tracking for nonspherical particles in a cylindrical fluidized bed

et al. 2017

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In granular flow operations, often particles are nonspherical. This has inspired a vast amount of research in understanding the behavior of these particles. Various models are being developed to study the hydrodynamics involving nonspherical particles. Experiments however are often limited to obtain data on the translational motion only. This paper focusses on the unique capability of Magnetic Particle Tracking to track the orientation of a marker in a full 3-D cylindrical fluidized bed. Stainless steel particles with the same volume and different aspect ratios are fluidized at a range of superficial gas velocities. Spherical and rod-like particles show distinctly different fluidization behavior. Also, the distribution of angles for rod-like particles changes with position in the fluidized bed as well as with the superficial velocity. Magnetic Particle Tracking shows its unique capability to study both spatial distribution and orientation of the particles allowing more in-depth validation of Discrete Particle Models.

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Effective drag on spheres immersed in a fluidized bed at minimum fluidization—Influence of bulk solids properties

et al. 2022

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The aims of this work are to elucidate the effects that bulk solids properties have on the effective drag experienced by large spheres immersed in an emulsion of group-B solids under minimum fluidization conditions and to analyze the ways in which the different suspensions react towards different applied shear rates. To investigate this, magnetic particle tracking was applied to resolve the trajectory of falling-sphere measurements in which the size, density, and sphericity of the bulk solids were varied as well as the size and density of the spherical tracers. The resulting experimental scope included both rising and sinking tracers as well as full segregation and in-bed stagnation of the tracers. The set-up provided highly resolved tracer trajectories, from which the drag experienced by the sphere can be calculated. For sinking tracers, the results showed that an increase in bulk solids size, angularity, and density reduced the terminal velocity of the sphere. This effect correlated well with the bed expansion and Hausner ratio, indicating that a reduced void space among the bulk solids is the main reason for the increase in motion resistance. At lower shear rates, namely, during the de-acceleration towards the stagnant state, beds of larger, more angular, or denser bulk solids yield lower levels of shear stress. The angle of repose of the bulk solids correlated with the rate at which the emulsion thins with increasing shear rate. For rising tracers, shear stress did not show any significant dependency on the properties of the bulk solids.

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Magnetic tracer-particle tracking in a fluid dynamically down-scaled bubbling fluidized bed

Cited by 36 publications

References 47 publications

Magnetic tracking of a fuel particle in a fluid-dynamically down-scaled fluidised bed

Magnetic tracking of a fuel particle in a fluid-dynamically down-scaled fluidised bed

Magnetic particle tracking for nonspherical particles in a cylindrical fluidized bed

Effective drag on spheres immersed in a fluidized bed at minimum fluidization—Influence of bulk solids properties

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