Stick-slip instability for viscous fingering in a gel
N. Puff, G. Debregeas, J. -M. di Meglio, D. Higgins, C. Wagner, D. Bonn
Abstract
The growth dynamics of an air finger injected in a visco-elastic gel (a PVA/borax aqueous solution) is studied in a linear Hele-Shaw cell. Besides the standard Saffmann-Taylor instability, we observe - with increasing finger velocities - the existence of two new regimes: (a) a stick-slip regime for which the finger tip velocity oscillates between 2 different values, producing local pinching of the finger at regular intervals, (b) a ``tadpole'' regime where a fracture-type propagation is observed. A scaling argument is proposed to interpret the dependence of the stick-slip frequency with the measured rheological properties of the gel.
Create a lesson
Related papers
Charged Three-Dimensional Solitons in a Ferroelectric Nematic Liquid Crystal
Netra Prasad Dhakal, Zakaria Siddiquee, Hiroya Nishikawa et al.
Frank Elastic Constants of Associating Rigid-Rodlike Systems
Akihiko Matsuyama
Medial Model of Elastic Curve Contacts, from Clasps to Knits
Kathryn Chain, Haoye Sun, Michael S. Dimitriyev
How symmetry and complexity shape three-dimensional programmable self-assembly
Prarthana Agrawal, Joakim Bohlin, Ard A. Louis
Designing tunable hyperuniformity in random organization through nonlocal noise
Yusheng Lei, Yuhan Peng, Ran Ni
Long-time Brownian dynamics of hard and sticky colloids by geometric projection
Rémi Martin, Sandrine Duluard, Céline Merlet