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Title: Detection of Fluidization with Real-Time Magnetic Resonance Imaging
Language: English
Authors: Penn, Alexander  
Boyce, Christopher M. 
Pruessmann, Klaas Paul 
Müller, Christoph Rüdiger 
Issue Date: 2018
Source: 8th World Congress on Particle Technology (2018)
Abstract (english): 
Unfluidized areas (dead zones) within gas-solid fluidized beds can deteriorate the mixing and heat transfer between the gas phase and the solid phase, and thus lower the performance, homogeneity and efficiency of the desired process. A thorough understanding of the conditions that lead to the formation of dead zones is therefore key in order to design, operate and scale fluidized bed reactors reliably. The experimental detection of dead zones inside three-dimensional (3D) fluidized beds can provide valuable information to validate theories and numerical models. However, due to the opacity of most granular materials, such measurements are challenging and require the use of intrusive probes1,2 or non-intrusive tomographic techniques, e.g. x-ray tomography3, electric capacitance tomography (ECT), positron emission particle tracking (PEPT)4 or magnetic resonance imaging (MRI)5. While intrusive probes perturb the granular dynamics, the tomographic techniques suffer from limitations in either their ability to measure particle motion (x-ray CT, ECT, PEPT) or from poor temporal resolution (MRI)6.
Conference: 8th World Congress on Particle Technology, WCPT8 2018 
Document Type: Chapter/Article (Proceedings)
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