%0 Journal Article
%T A meniscus fingering instability in viscoelastic fluids
%+ Service de physique de l'état condensé (SPEC - UMR3680)
%+ Systèmes Physiques Hors-équilibre, hYdrodynamique, éNergie  et compleXes (SPHYNX)
%+ Department of Mechanical Engineering [Massachusetts Institute of Technology] (MIT-MECHE)
%+ Physique et Mécanique des Milieux Divisés (PMMD)
%+ Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris)
%A Saintyves, Baudouin
%A Mora, Serge
%A Bouchaud, Elisabeth
%Z ANR-2010-BLAN-0402-1
%< avec comité de lecture
%@ 1070-6631
%J Physics of Fluids
%I American Institute of Physics
%V 31
%N 6
%P 063108
%8 2019-06
%D 2019
%R 10.1063/1.5097685
%K Instability
%K Viscoelatic fluids
%K Fingering
%Z Engineering Sciences [physics]/Materials
%Z Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]Journal articles
%X We report experiments where a viscoelastic fingering instability develops at the free interface between air and a model viscoelastic fluid confined in a Hele-Shaw cell. The fluid is symmetrically stretched with constant velocity along two opposite directions, leading to the inflation of a two-dimensional air bubble growing from a millimetric centered hole. The instability is observed when the circumferential stretch of the inflating bubble reaches a threshold, that depends on the viscoelastic properties of the fluid through the ratio of the material relaxation time to the time elapsed before the fingers start to develop. The critical stretch of the bulk fingering instability of a stretchable elastic solid [B. Saintyves, O. Dauchot, and E. Bouchaud, Phys. Rev. Lett., 111, 047801 (2013)] is recovered for large values of this ratio.
%G English
%2 https://hal.science/hal-02169757/document
%2 https://hal.science/hal-02169757/file/Art_Mora_al_Physic-Fluids_2019.pdf
%L hal-02169757
%U https://hal.science/hal-02169757
%~ CEA
%~ ESPCI
%~ CNRS
%~ LMGC
%~ PARISTECH
%~ DSV
%~ IRAMIS-SPEC
%~ CEA-UPSAY
%~ PSL
%~ UNIV-PARIS-SACLAY
%~ CEA-UPSAY-SACLAY
%~ MIPS
%~ UNIV-MONTPELLIER
%~ CEA-DRF
%~ TEST-HALCNRS
%~ ESPCI-PSL
%~ GS-ENGINEERING
%~ IRAMIS
%~ GS-PHYSIQUE
%~ INSTITUT-SCIENCES-LUMIERE
%~ UM-2015-2021