TY - JOUR
T1 - X-ray tomography for fully-3D time-resolved reconstruction of bubbling fluidized beds
AU - Graas, Adriaan B.M.
AU - Wagner, Evert C.
AU - van Leeuwen, Tristan
AU - van Ommen, J. Ruud
AU - Batenburg, K. Joost
AU - Lucka, Felix
AU - Portela, Luis M.
PY - 2024
Y1 - 2024
N2 - A new X-ray computed tomography technique for the purpose of imaging fluidized beds is presented. It consists of an experimental set-up with three stationary X-ray source and flat panel detector pairs, a geometric calibration and data processing workflow, and an image reconstruction algorithm. The technique enables sparse-angular tomographic reconstruction in large 3D regions of fluidized beds at framerates up to 200 Hz, and therefore images bubbles along their whole trajectories through the volume. It allows for a unique analysis of bubble dynamics in fluidized beds, including bubble velocities, bubble transformations, i.e., time evolution of the bubble distributions in space, and bubble–bubble interactions. In this article, we first analyze the main limitation of the technique, the sparse angular resolution, through numerical simulations. We then test the experimental set-up through imaging a series of phantoms. Lastly, we demonstrate results from a Geldart B bubbling fluidized bed.
AB - A new X-ray computed tomography technique for the purpose of imaging fluidized beds is presented. It consists of an experimental set-up with three stationary X-ray source and flat panel detector pairs, a geometric calibration and data processing workflow, and an image reconstruction algorithm. The technique enables sparse-angular tomographic reconstruction in large 3D regions of fluidized beds at framerates up to 200 Hz, and therefore images bubbles along their whole trajectories through the volume. It allows for a unique analysis of bubble dynamics in fluidized beds, including bubble velocities, bubble transformations, i.e., time evolution of the bubble distributions in space, and bubble–bubble interactions. In this article, we first analyze the main limitation of the technique, the sparse angular resolution, through numerical simulations. We then test the experimental set-up through imaging a series of phantoms. Lastly, we demonstrate results from a Geldart B bubbling fluidized bed.
KW - Computed Tomography
KW - Dynamic imaging
KW - Fluidized beds
KW - Gas–solids
KW - Iterative image reconstruction
KW - X-ray imaging set-up
UR - http://www.scopus.com/inward/record.url?scp=85180597150&partnerID=8YFLogxK
U2 - 10.1016/j.powtec.2023.119269
DO - 10.1016/j.powtec.2023.119269
M3 - Article
AN - SCOPUS:85180597150
SN - 0032-5910
VL - 434
JO - Powder Technology
JF - Powder Technology
M1 - 119269
ER -