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Model for the fingering instability of spreading surfactant drops

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.

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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.

Item Type:Article
Additional Information:©1990 The American Physical Society Received 26 October 1989
Record Number:CaltechAUTHORS:TROprl90
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4976
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Deposited On:18 Sep 2006
Last Modified:18 Sep 2014 18:11

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