Measurement of liquid distributions in particle packings using wire - mesh sensor versus transmission tomographic imaging / Andre Bieberle in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010)  

Measurement of liquid distributions in particle packings using wire - mesh sensor versus transmission tomographic imaging [texte imprimé] / Andre Bieberle, Auteur ; Markus Schubert, Auteur ; Marco Jose da Silva, Auteur . - 2010 . - pp. 9445–9453.
Chimie industrielle
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9445–9453

Mots-clés :	Imaging techniques Hydrodynamics
Résumé :	The paper compares two different imaging techniques for the investigation of the hydrodynamics in a laboratory packed bed reactor operating at different stationary states and with two different particle packings. The wire-mesh sensor offers cross-sectional liquid holdup distribution imaging at an ultra high speed of 10000 frames/s and good spatial resolution of 6 mm. It is therefore a very useful imaging tool for transient and periodic flow conditions. Up to now its influence on the flow in a packed bed was never analyzed. γ-ray computed tomography uses 662 keV γ photons to obtain cross-sectional phase distribution images. It offers as well a good spatial resolution of 2 mm and does not influence the flow but needs rather long scanning times. As a noninvasive technique γ-ray tomography has been used as a reference modality to evaluate the wire-mesh sensor measurements. Data from both imaging modalities are compared utilizing different analyzing models and showed good agreement. For the wire-mesh sensor only marginal intrusive effects for the specific situation were found.
ISSN :	0888-5885
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie100900g