3D magnetic resonance velocimetry for the characterization of hydrodynamics in microdevices
Résumé
3D velocity field measurements in an arrow-type micromixer are performed using nuclear magnetic resonance (NMR) imaging methods. A specific device has been set up including a home-made radiofrequency milli-coil matching the geometry of the manufactured micromixer, allowing an improvement of the signal-to-noise ratio by a factor 7 comparing to a standard commercial hardware. The NMR images obtained are compared to computational fluid dynamics (CFD) simulations. The very good agreement obtained between numerical data and experimental measurements revealed, on the one hand, the capacity of the developed method to perform a detailed and accurate study of phenomena occurring in a microstructured system and on the other hand, the great impact of small manufacturing defects on the hydrodynamics in a micromixer and thus on the mixing performances
Origine : Fichiers produits par l'(les) auteur(s)
Licence : CC BY NC ND - Paternité - Pas d'utilisation commerciale - Pas de modification
Licence : CC BY NC ND - Paternité - Pas d'utilisation commerciale - Pas de modification