Films driven by surface tension gradients

Fingering instabilities are often observed at the contact line of drops of surfactant solutions spreading spontaneously on solid surfaces. It has been recognised recently that a usual linear stability analysis predicts stable behaviour in contrast to the observed instability. It now seems the instab...

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Bibliographic Details
Published in:Advances in colloid and interface science 2002-02, Vol.96 (1), p.59-74
Main Authors: Cachile, M, Schneemilch, M, Hamraoui, A, Cazabat, A.M
Format: Article
Language:English
Subjects:
Linear stability analysis
Surface tension gradients
Surfactant solutions
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Summary:Fingering instabilities are often observed at the contact line of drops of surfactant solutions spreading spontaneously on solid surfaces. It has been recognised recently that a usual linear stability analysis predicts stable behaviour in contrast to the observed instability. It now seems the instability arises from short-time transients, where the thickness of the film ahead of the main drop is a crucial parameter for amplification. We reconsidered previous experiments and performed new ones along these lines. The strengths and weaknesses of the available models were analysed.
ISSN:0001-8686
1873-3727
DOI:10.1016/S0001-8686(01)00075-6