Quasi-two-dimensional foam flow through and around a permeable obstacle

Quasi-two-dimensional foam flow through and around a permeable obstacle Full article

Journal

Physical Review Fluids
ISSN: 2469-990X

Output data

Year: 2020, Volume: 5, Number: 9, Article number : 093301, Pages count : DOI: 10.1103/physrevfluids.5.093301

Authors

Shmakova Natalia ¹ , Chevalier Thibaud ² , Puisto Antti ² , Alava Mikko ² , Raufaste Christophe ³ , Santucci Stéphane ⁴

Affiliations

1	Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences
2	COMP Center of Excellence, Department of Applied Physics, Aalto University, Espoo, Finland
3	Université Côte d’Azur, CNRS, Institut de Physique de Nice
4	Université de Lyon, ENSL, UCBL, CNRS, Laboratoire de Physique, Lyon,

We present an experimental study of a two-dimensional liquid foam, composed of a confined monolayer of bubbles, forced to flow within a model porous medium that mimics an inhomogeneous open fracture. It consists of a Hele-Shaw cell with a single localized constriction-like defect that reduces locally its gap and thus its permeability. Taking advantage of the possibility to directly visualize and follow the bubbles, we compute the bubble velocity field by image correlation analysis, as well as the bubble deformation field, through eccentricity measurements obtained by fitting each bubble with an ellipse. The defect acting as a permeable obstacle can strongly disturb the foam flow; we investigate here the influence of its geometry (height, size, and shape) on the average steady-state flow of foams of various liquid content, and specifically the motion and deformation of their elementary components, the bubbles. In the frame of the flowing foam, we can observe a recirculation around the obstacle, characterized by a multipolar velocity field. Its complex structure displays a strong fore-aft asymmetry, with an extended region downstream the constriction, where the foam velocity can be much larger than the imposed driving one. This overshoot was already revealed for nonpermeable obstacles, but here we show that its extent and intensity are associated to the bubble deformation and depend strongly and nontrivially on both the geometry of the constriction as well as the liquid fraction of the foam.

Shmakova N. , Chevalier T. , Puisto A. , Alava M. , Raufaste C. , Santucci S.
Quasi-two-dimensional foam flow through and around a permeable obstacle
Physical Review Fluids. 2020. V.5. N9. 093301 . DOI: 10.1103/physrevfluids.5.093301 WOS Scopus РИНЦ OpenAlex

Submitted:	Jan 27, 2020
Accepted:	Jul 27, 2020
Published print:	Sep 10, 2020

Web of science:	WOS:000567767200001
Scopus:	2-s2.0-85092428103
Elibrary:	45236962
OpenAlex:	W3085454353

DB	Citing
Scopus	8
OpenAlex	8
Elibrary	8
Web of science	8