Ultrafast velocity imaging of single- and two-phase flows in a ceramic monolith.
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.
Heras
Jon J
JJ
University of Cambridge, Department of Chemical Engineering, Pembroke Street, Cambridge CB2 3RA, UK.
Sederman
Andrew J
AJ
Gladden
Lynn F
LF
D002516:Ceramics / Q000737:chemistry*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D011522:Protons; D012212:Rheology
D011522:Protons