Title :

Inverse saffman-taylor experiments with particles lead to capillarity driven fingering instabilities

Author(s) :

Bihi, Ilyesse [Auteur]
Department of Chemical Engineering [Gainesville] [UF|CHE]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Baudoin, Michael [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Butler, Jason E. [Auteur]
Department of Chemical Engineering [Gainesville] [UF|CHE]
Faille, Christine [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Zoueshtiagh, Farzam [Auteur]
Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Journal title :

Physical Review Letters

Publisher :

American Physical Society

Publication date :

2016

ISSN :

0031-9007

Keyword(s) :

microbilles

English keyword(s) :

interfaces

HAL domain(s) :

Sciences du Vivant [q-bio]
Sciences du Vivant [q-bio]/Ingénierie des aliments
Sciences de l'ingénieur [physics]/Génie des procédés

English abstract : [en]

Using air to displace a viscous fluid contained in a Hele-Shaw cell can create a fingering pattern at the interface between the fluids if the capillary number exceeds a critical value. This Saffman-Taylor instability is ...
Show more >Using air to displace a viscous fluid contained in a Hele-Shaw cell can create a fingering pattern at the interface between the fluids if the capillary number exceeds a critical value. This Saffman-Taylor instability is revisited for the inverse case of a viscous fluid displacing air when partially wettable hydrophilic particles are lying on the walls. Though the inverse case is otherwise stable, the presence of the particles results in a fingering instability at low capillary number. This capillary-driven instability is driven by the integration of particles into the interface which results from the minimization of the interfacial energy. Both axisymmetric and rectangular geometries are considered in order to quantify this phenomenon.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL