Exchange relaxometry of flow at small Péclet numbers in a glass bead pack
- In this paper we consider low Péclet number flow in bead packs. A series of relaxation exchange experiments has been conducted and evaluated by ILT analysis. In the resulting correlation maps, we observed a collapse of the signal and a translation towards smaller relaxation times with increasing flow rates, as well as a signal tilt with respect to the diagonal. In the discussion of the phenomena we present a mathematical theory for relaxation exchange experiments that considers both diffusive and advective transport. We perform simulations based on this theory and discuss them with respect to the conducted experiments.
Author: | Alexandra Maria Olaru, Julia KowalskiORCiD, Vaishali Sethi, Bernhard Blümich |
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DOI: | https://doi.org/10.1016/j.jmr.2012.04.015 |
ISSN: | 1096-0856 |
Parent Title (English): | Journal of Magnetic Resonance (JMR) |
Publisher: | Elsevier |
Place of publication: | Amsterdam |
Document Type: | Article |
Language: | English |
Year of Completion: | 2012 |
Tag: | Low-field NMR; NMR exchange relaxometry |
Volume: | 220 |
First Page: | 32 |
Last Page: | 44 |
Link: | https://doi.org/10.1016/j.jmr.2012.04.015 |
Zugriffsart: | campus |
Institutes: | FH Aachen / Fachbereich Luft- und Raumfahrttechnik |
collections: | Verlag / Elsevier |