Surface tension of flowing soap films

Abstract

The surface tension of flowing soap films is measured with respect to the film thickness and the concentration of soap solution. We perform this measurement by measuring the curvature of the nylon wires that bound the soap film channel and use the measured curvature to parametrize the relation between the surface tension and the tension of the wire. We find the surface tension of our soap films increases when the film is relatively thin or made of soap solution of low concentration, otherwise it approaches an asymptotic value 30 mN/m. A simple adsorption model with only two parameters describes our observations reasonably well. With our measurements, we are also able to measure Gibbs elasticity for our soap film.

arXiv comment14 pages, 4 figures

References in corpus (6)

• Macroscopic effects of the spectral structure in turbulent flows
• Dynamics of a deformable body in a fast flowing soap film
• Marangoni elasticity of flowing soap films
• A Unified Strouhal-Reynolds Number Relationship for Laminar Vortex Streets Generated by Different Shaped Obstacles
• Tunneling of Micro-sized Droplets Through a Flowing Soap Film
• On angled bounce-off impact of a drop impinging on a flowing soap film

Cited by in corpus (5)

• Shape Deformation and Drag Variation of a Coupled Rigid-flexible System in a Flowing Soap Film
• A curvilinear surface ALE formulation for self-evolving Navier-Stokes manifolds - Stabilized finite element formulation
• The effect of menisci on vortex streets on soap film flows
• Size distribution of decaying foam bubbles
• The effect of mean flow speed in soap film channels