Role of surface elasticity in the drainage of soap films

1993 ◽  
Vol 71 (14) ◽  
pp. 2342-2345 ◽  
Author(s):  
A. A. Sonin ◽  
A. Bonfillon ◽  
D. Langevin
Keyword(s):  
Surface Elasticity ◽  
Soap Films

Thinning of Soap Films: The Role of Surface Viscoelasticity

1994 ◽  
Vol 162 (2) ◽  
pp. 323-330 ◽  
Author(s):  
A.A. Sonin ◽  
A. Bonfillon ◽  
D. Langevin
Keyword(s):  
Soap Films

scholarly journals Theoretical study of the generation of soap films: role of interfacial visco-elasticity

2013 ◽  
Vol 739 ◽  
pp. 124-142 ◽  
Author(s):  
Jacopo Seiwert ◽  
Benjamin Dollet ◽  
Isabelle Cantat
Keyword(s):  
Steady State ◽  
Liquid Film ◽  
Capillary Number ◽  
Theoretical Study ◽  
Surfactant Solution ◽  
Constant Thickness ◽  
Interfacial Rheology ◽  
Soap Films ◽  
Elastic Case

AbstractIn this work, we study theoretically the thickness of a liquid film (typically made of a surfactant solution) pulled out of a bath at constant speed in the absence of gravity, when it features a viscous or an elastic interfacial rheology. We show that a purely viscous rheology does not lead to the extraction of a steady state film of constant thickness. In contrast, the thickness of the film is well defined in the elastic case, which allows us to compute it. This thickness depends on the capillary number of the experiment, and on the elasticity of the interface. It is always lower than or equal to that obtained for an incompressible interface predicted by Frankel (Mysels, Shinoda and Frankel, Soap Films: Studies of their Thinning and a Bibliography, 1959), which is recovered in the limit of an arbitrary large elasticity.

scholarly journals Holes and cracks in rigid foam films

2015 ◽  
Vol 774 ◽  
Author(s):  
P. C. Petit ◽  
M. Le Merrer ◽  
A.-L. Biance
Keyword(s):  
Active Material ◽  
Surface Elasticity ◽  
Classical Problem ◽  
Film Rupture ◽  
Rigid Foam ◽  
Foam Films ◽  
Rupture Dynamics ◽  
Foam Film ◽  
Surface Active Material

The classical problem of foam film rupture dynamics has been investigated when the film interfaces exhibit very high rigidity due to the presence of specific surfactants. Two new features are reported. First, a strong deviation from the well-known Taylor–Culick law is observed. Second, crack-like patterns can be visualized in the film; these patterns are shown to appear at a well-defined film shrinkage. The key role of surface-active material on these features is quantitatively investigated, pointing to the importance of surface elasticity to describe these fast dynamical processes and thus providing an alternative tool to characterize surface elasticity in conditions extremely far from equilibrium. The origin of the cracks and their consequences on film rupturing dynamics are also discussed.

scholarly journals Finite size effect on nanomechanical mass detection: the role of surface elasticity

2011 ◽  
Vol 22 (26) ◽  
pp. 265502 ◽  
Author(s):  
Mai Duc Dai ◽  
Chang-Wan Kim ◽  
Kilho Eom
Keyword(s):  
Size Effect ◽  
Surface Elasticity ◽  
Finite Size ◽  
Finite Size Effect ◽  
Mass Detection

On the Possible Role of Surface Elasticity in Emulsion Stability

Langmuir ◽  
2009 ◽  
Vol 25 (10) ◽  
pp. 5565-5573 ◽  
Author(s):  
Daniela Georgieva ◽  
Véronique Schmitt ◽  
Fernando Leal-Calderon ◽  
Dominique Langevin
Keyword(s):  
Emulsion Stability ◽  
Surface Elasticity

scholarly journals Deformation of soap films pushed through tubes at high velocity

2010 ◽  
Vol 652 ◽  
pp. 529-539 ◽  
Author(s):  
BENJAMIN DOLLET ◽  
ISABELLE CANTAT
Keyword(s):  
Simple Model ◽  
High Velocity ◽  
Equilibrium Configuration ◽  
Hydraulic Diameter ◽  
Radius Of Curvature ◽  
Inertial Effects ◽  
Soap Films ◽  
Small Parameters ◽  
Tube Geometry

The behaviour of soap films pushed through tubes at large velocities, up to several metres per second, is investigated in this paper. The film shape deviates from its equilibrium configuration perpendicular to the walls and gets curved downstream. A simple model relates the radius of curvature of the film to the friction in the lubrication films touching the wall, and the scaling of Bretherton (J. Fluid Mech., vol. 10, 1961, pp. 166–188) holds up to surprisingly high velocities, at which the capillary and Weber numbers are no longer small parameters. The tube geometry is varied and accounted for through the notion of hydraulic diameter. A limit of stability of the films, beyond which they burst or evolve unsteadily, is predicted, and it quantitatively captures the observations. The new questions raised by our results on the dissipation in soap films are discussed, especially the role of Plateau borders and inertial effects.

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor
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