Troian, S. M. and Herbolzheimer, E. and Safran, S. A. (1990) Model for the fingering instability of spreading surfactant drops. Physical Review Letters, 65 (3). pp. 333-336. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:TROprl90
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We show that the Marangoni effect drives the fingering instability observed at the edge of an aqueous surfactant drop spreading on a thin film of water. A calculation of the unperturbed flow profile demonstrates that the spreading of the drop is controlled by the dynamics of a thin layer which develops in front of the drop. The surface-tension gradient in this region leads to the fingering instability via a mechanism mathematically similar to that in Hele-Shaw flow despite the very different underlying physics.
|Additional Information:||©1990 The American Physical Society Received 26 October 1989|
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