X-Ray Particle Tracking Velocimetry in Fluidized Beds

Drake, Joshua B.; Tang, Lie; Heindel, Theodore J.

doi:10.1115/fedsm2009-78150

Cited by 9 publications

(19 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One type of fluidized bed operation involves the gasification of injected biomass particles. X-ray particle tracking is an excellent experimental technique to track the simulation of particle injection into a fluidized bed [12,24].…”

Section: Sample Particle Tracking In a Fluidized Bedmentioning

confidence: 99%

“…[12,24]. They showed that they can successfully track large intruder particles (~9 mm in diameter) in a fluidized bed composed of 500-600 f .…”

Section: Introductionmentioning

confidence: 99%

“….Un glass beads. Drake and Heindel [12] summarized potential system improvements to enhance the tracking abilities, including enhanced image analysis techniques, better intruder particle manufacturing capabilities, and faster camera systems.…”

Section: Introductionmentioning

confidence: 99%

“…Though similar to visible light, these techniques have the ability to visualize flow patterns through the opaque materials found in many multiphase flows. Specific particle tracking methods for opaque fluid flows that have appeared in the literature include radioactive emitting tracer particles [5][6][7][8], X-ray absorbing particles [9][10][11][12], or neutron absorbing particles [13]. X-ray Particle Tracking Velocimelry (XPTV) is an X-ray imaging technique where several X-ray absorbing objects (particles) are tracked simultaneously as a function of time.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Developing Tracer Particles for X-Ray Particle Tracking Velocimetry

Drake

Kenney

Morgan

et al. 2011

ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D

Self Cite

View full text Add to dashboard Cite

X-ray imaging, as a noninvasive flow visualization technique, has been shown to be a useful method for observing and characterizing multiphase flows. One type of X-ray flow visualization technique, called X-ray Particle Tracking Velocimetry (XPTV), tracks an X-ray attenuating particle in an opaque fluid flow. A significant challenge with XPTV is identifying tracer particles with the desired fluid flow characteristics (e.g., small and neutrally buoyant) but yet differentially attenuate X-rays, which is based primarily on density differences. This paper describes the manufacturing of XPTV tracer particles that satisfy specific particle characteristics including high X-ray attenuation, uniform shape, specified effective density, and desired diameter. An example use of these particles as an intruder particle in a fluidized bed (to simulate biomass injection) is then demonstrated using X-ray stereographic imaging to determine intruder particle position as a function of time in a three-dimensional opaque system. ABSTRACT X-ray imaging, as a noninvasive flow visualization technique, has been shown to be a useful method for observing and characterizing multiphase flows. One type of X-ray flow visualization technique, called X-ray Particle Tracking Velocimetry (XPTV), tracks an X-ray attenuating particle in an opaque fluid flow. A significant challenge with XPTV is identifying tracer particles with the desired fluid flow characteristics (e.g., small and neutrally buoyant) but yet differentially attenuate X-rays, which is based primarily on density differences. This paper describes the manufacturing of XPTV tracer particles that satisfy specific particle characteristics including high X-ray attenuation, uniform shape, specified effective density, and desired diameter. An example use of these particles as an intruder particle in a fluidized bed (to simulate biomass injection) is then demonstrated using Xray stereographic imaging to determine intruder particle position as a function of time in a three-dimensional opaque system.

show abstract

Section: Sample Particle Tracking In a Fluidized Bedmentioning

confidence: 99%

“…[12,24]. They showed that they can successfully track large intruder particles (~9 mm in diameter) in a fluidized bed composed of 500-600 f .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Developing Tracer Particles for X-Ray Particle Tracking Velocimetry

Drake

Kenney

Morgan

et al. 2011

ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D

Self Cite

View full text Add to dashboard Cite

show abstract

“…al. [21]. However, the algorithm used was a native function in MatLab; for this study, the normalized cross-correlation is coded into the X-ray acqu isition and analysis software.…”

Section: Particle Tracking and Edge Detectionmentioning

confidence: 99%

X-Ray Particle Tracking of Dense Particle Motion in a Vibration-Excited Granular Bed

Morgan

Heindel

2010

Volume 7: Fluid Flow, Heat Transfer and Thermal Systems, Parts a and B

Self Cite

View full text Add to dashboard Cite

The Brazil nut effect is a phenomenon in which large, dense objects migrate to the top of a bed of granular media when exposed to vibration. An example of this phenomenon is finding Brazil nuts on the top of a can of mixed nuts. The same phenomenon can be observed in almost any granular system, which includes numerous industrial processes. By understanding the Brazil nut effect, knowledge can be gained to create or prevent segregation within desired industrial processes. In this project, the Brazil nut problem is examined through the use of stereoscopic X-ray imaging. The stereoscopic images are analyzed with a particle tracking algorithm to quantify large particle motion in three dimensional space. Particle motion is quantified under a variety of operating conditions to both observe the particle motion and examine the accuracy of the particle tracking algorithm.Keywords granular fluid flow, visualization, x-ray particle tracking, Brazil nut effect ABSTRACTThe Brazi l nut effect is a phenomenon in which large, dense objects mi grate to the top of a bed of granular media when exposed to vibration . An example of this phenomenon is finding Brazil nuts on the top of a can of mixed nuts. The same phenomenon can be observed in almost any granular system, which includes numerous industri al processes. By understanding the Brazil nut effect, knowledge can be gained to create or prevent segregation within desired industrial processes.In this project, the Brazil nut problem is examined through the use of stereoscopic X-ray imaging. The stereoscopic images are analyzed with a particle tracking algorithm to quantify large particle motion in three dimensional space. Particle motion is quantified under a variety of operating conditions to both observe the particle motion and examine the accuracy of the particle tracking algorithm.

show abstract