Print Email Facebook Twitter X-ray tomography for fully-3D time-resolved reconstruction of bubbling fluidized beds Title X-ray tomography for fully-3D time-resolved reconstruction of bubbling fluidized beds Author Graas, Adriaan B.M. (Centrum Wiskunde & Informatica (CWI)) Wagner, E.C. (TU Delft ChemE/O&O groep) van Leeuwen, Tristan (Centrum Wiskunde & Informatica (CWI)) van Ommen, J.R. (TU Delft ChemE/Product and Process Engineering) Batenburg, K. Joost (Universiteit Leiden) Lucka, Felix (Centrum Wiskunde & Informatica (CWI)) Portela, L. (TU Delft ChemE/Transport Phenomena) Date 2024 Abstract 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. Subject Computed TomographyDynamic imagingFluidized bedsGas–solidsIterative image reconstructionX-ray imaging set-up To reference this document use: http://resolver.tudelft.nl/uuid:d7b524bf-ebcb-4b06-8fe8-6841e00e78cd DOI https://doi.org/10.1016/j.powtec.2023.119269 ISSN 0032-5910 Source Powder Technology, 434 Part of collection Institutional Repository Document type journal article Rights © 2024 Adriaan B.M. Graas, E.C. Wagner, Tristan van Leeuwen, J.R. van Ommen, K. Joost Batenburg, Felix Lucka, L. Portela Files PDF 1_s2.0_S0032591023010525_main.pdf 3.68 MB Close viewer /islandora/object/uuid:d7b524bf-ebcb-4b06-8fe8-6841e00e78cd/datastream/OBJ/view