title: Ultrafast velocity imaging of single- and two-phase flows in a ceramic monolith.
abstract: Ceramic monoliths, comprising arrays of parallel channels, are increasingly being considered as an alternative to conventional packed beds for chemical processing operations involving both single- and two-phase flows. This paper reports results obtained using a technique based on the rapid acquisition with relaxation enhancement (RARE) pulse sequence in which multiple images are obtained from a single r.f. excitation. The technique is applied to study single- and two-phase flow in a monolith rated at 200 channels per square inch (cpsi). A single image frame, acquired in 156 ms, provides a characterization of the heterogeneity in the magnitude and direction of the flow within the monolith.
authors.affiliation: University of Cambridge, Department of Chemical Engineering, Pembroke Street, Cambridge CB2 3RA, UK.
authors.forename: Jon J
authors.initials: JJ
authors.lastname: Heras
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Sederman
authors.forename: Lynn F
authors.initials: LF
authors.lastname: Gladden
mesh_terms: D002516:Ceramics / Q000737:chemistry*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D011522:Protons; D012212:Rheology
chemical_list: D011522:Protons