NMR imaging of fluid pathways during drainage of softwood in a pressure membrane chamber

Abstract : An experiment was implemented to study fluid flow in a pressure media. This procedure successfully combines nuclear magnetic resonance imaging with a porous membrane chamber in order to visualize the non-wetting and wetting fluid flows with controlled boundary conditions. A specific pressure minute membrane chamber, made of non magnetic materials and able to withstand 4 MPa, was conceived and built for this purpose. These two techniques were applied to the drainage of Douglas fir sapwood. In the study of the longitudinal flow, narrow drainage fingers are formed in the latewood zones. They follow the longitudinal direction of wood and spread throughout the sample length. These fingers then enlarge in the cross-section plane and coalesce until drainage reach the whole latewood part. At the end of the essays, when drainage of liquid water in latewood is completed, just a few sites of percolation appear in earlywood zones. This difference is a result of the wood anatomical structure, where pits, the apertures that allow the sap to flow between wood cells, are more easily aspirated in earlywood than in latewood.
Type de document :
Article dans une revue
International Journal of Multiphase Flow, Elsevier, 2008, 34, pp.312 - 321. 〈10.1016/j.ijmultiphaseflow.2007.10.009〉
Liste complète des métadonnées

Littérature citée [30 références]  Voir  Masquer  Télécharger

https://hal.univ-lorraine.fr/hal-01482134
Contributeur : Sebastien Leclerc <>
Soumis le : vendredi 3 mars 2017 - 11:50:01
Dernière modification le : jeudi 13 septembre 2018 - 15:24:10
Document(s) archivé(s) le : mardi 6 juin 2017 - 12:53:05

Fichiers

Almeida, Leclerc and Perre-mod...
Fichiers produits par l'(les) auteur(s)

Identifiants

Citation

Giana Almeida, Sébastien Leclerc, Patrick Perre. NMR imaging of fluid pathways during drainage of softwood in a pressure membrane chamber. International Journal of Multiphase Flow, Elsevier, 2008, 34, pp.312 - 321. 〈10.1016/j.ijmultiphaseflow.2007.10.009〉. 〈hal-01482134〉

Partager

Métriques

Consultations de la notice

113

Téléchargements de fichiers

72