Time-resolved X-ray tomography of a fluidized bed

✍ Scribed by R.F. Mudde

• Book ID: 104089063
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 439 KB
• Volume: 199
• Category: Article
• ISSN: 0032-5910
• DOI: 10.1016/j.powtec.2009.04.021

✦ Synopsis

This paper discusses first results of bubbles moving through a fluidized bed imaged with an X-ray Tomographic Scanner. The scanner is made of 3 medical X-ray sources equipped with 30 CdWO 4 detectors each. The fluidized bed has a diameter of 23 cm and is filled with Geldart B powder. The scanner measures the attenuation in a thin slice perpendicular to the column axis at a sampling frequency of 2500 Hz. The data collected during 2 s are reconstructed using the SART algorithm with a one-step-late correction. The reconstructions show the distribution of the bubbles in the 2-dimensional cross-section. By stacking these images, a 3-dimensional view of the bubbles in the column is represented.