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 |
|---|---|
| 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 |
| Date of the Publication (Server): | 2013/01/21 |
| 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 |
