Marangoni effect

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Marangoni effect

[‚mär·äŋ′gō·nē i‚fekt]
(chemical engineering)
The effect that a disturbance of the liquid-liquid interface (due to interfacial tension) has on mass transfer in a liquid-liquid extraction system.
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Professor Geoff Stevens from the University of Melbourne's Department of Chemical and Biomolecular Engineering says while it's possible, he doesn't think Marangoni effects, or the normal diffusion of the chalk or leaf particles from areas of high to low density are involved.
Altshuler and colleagues speculate, the upstream vortex is being reinforced by a Marangoni effect associated with a decrease of the surface tension in the lower reservoir caused by increasing the amount of floating chalk dust or mate leaves.