Dynamic NMR microscopy of gas phase Poiseuille flow

TitleDynamic NMR microscopy of gas phase Poiseuille flow
Publication TypeJournal Article
Year of Publication2001
AuthorsKaiser L.G, Logan J.W, Meersmann T., Pines A
JournalJournal of Magnetic Resonance
Date PublishedMar
ISBN Number1090-7807
Accession NumberWOS:000168078800021

Dynamic NMR microscopy has been used to study xenon gas undergoing Poiseuille flow in the regime where deterministic and stochastic motions are the same order of magnitude. For short observation time, the flow profile images are largely influenced by the longitudinal diffusion, manifested by large displacements in both positive and negative directions. For longer observation time, the effect of the mixing between the fast and slow flow components due to transverse diffusion becomes apparent. A spin-echo version of the dynamic NMR experiment yields images exhibiting strong distortions for longer observation time due to fast diffusion under the "natural" gradient from magnetic field inhomogeneity (compared to results obtained with a stimulated echo version). This effect is used as an edge-enhancement filter by employing a longer time duration of the imaging gradient in a stimulated echo experiment. (C) 2001 Academic Press.

URL<Go to ISI>://WOS:000168078800021
Short TitleDynamic NMR microscopy of gas phase Poiseuille flow
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