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Magnetic particle tracking for nonspherical particles in a cylindrical fluidized bed
Kay A Buist1, Pavithra Jayaprakash1, J A M Kuipers1
1Dept. of Chemical Engineering & Chemistry, Multiphase Reactors group Eindhoven University of Technology 5600 MB Eindhoven The Netherlands.
Aiche Journal. American Institute of Chemical Engineers
|December 8, 2017
Summary
Magnetic Particle Tracking precisely tracks particle orientation in 3D fluidized beds. This reveals distinct fluidization behaviors for spherical versus rod-like particles, aiding model validation.
Area of Science:
- Fluid mechanics
- Particle technology
- Rheology
Background:
- Granular flow operations frequently involve nonspherical particles, necessitating research into their behavior.
- Existing experimental methods often capture only translational motion, limiting hydrodynamic studies.
- Discrete Particle Models require detailed validation, including particle orientation data.
Purpose of the Study:
- To demonstrate the capability of Magnetic Particle Tracking (MPT) for 3D particle orientation tracking.
- To investigate the fluidization behavior of nonspherical particles in a cylindrical fluidized bed.
- To compare the fluidization of spherical and rod-like particles.
Main Methods:
- Utilizing Magnetic Particle Tracking (MPT) to monitor particle orientation in a 3D cylindrical fluidized bed.
- Employing stainless steel particles of equal volume but varying aspect ratios (spherical and rod-like).
- Conducting experiments across a range of superficial gas velocities.
Main Results:
- Spherical and rod-like particles exhibit markedly different fluidization characteristics.
- The angular distribution of rod-like particles varies with spatial position within the bed.
- Particle orientation distribution is also dependent on superficial gas velocity.
Conclusions:
- Magnetic Particle Tracking (MPT) uniquely enables simultaneous tracking of particle spatial distribution and orientation.
- The findings provide crucial data for validating Discrete Particle Models (DPM) involving nonspherical particles.
- This technique offers a more comprehensive understanding of granular flow hydrodynamics.
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