Effect of Surface Tension Variations on the Pinch-Off Behavior of Small Fluid Drops in the Presence of Surfactants | Zendy

Matthieu Roché | Zendy; Mounir Aytouna | Zendy; Daniel Bonn | Zendy; H. Kellay | Zendy

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Effect of Surface Tension Variations on the Pinch-Off Behavior of Small Fluid Drops in the Presence of Surfactants

Author(s) -

Matthieu Roché,

Mounir Aytouna,

Daniel Bonn,

H. Kellay

Publication year - 2009

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.103.264501

Subject(s) - pulmonary surfactant , surface tension , materials science , radius , pinch , mechanics , tension (geology) , thermodynamics , composite material , physics , compression (physics) , computer security , computer science , nuclear physics

International audienceIt is shown experimentally that surfactants can change the thinning rate of fluid necks undergoing rupture. In the case of two-fluid pinch-off, two or three linear regimes are observed for the variation of the neck radius versus time. The surface tension in the neck region changes with time, as a result of surfactant depletion. Similar results are obtained for the case of a single fluid pinching in air. The depletion of surfactant can be either partial or complete depending on the rate of transport of the surfactant from the bulk to the surface

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