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Chemical control of hydrodynamic instabilities in partially miscible two-layer systems

Budroni, Marcello Antonio and Riolfo, L.A. and Lemaigre, L. and Rossi, Federico and Rustici, Mauro and De Wit, Anne (2014) Chemical control of hydrodynamic instabilities in partially miscible two-layer systems. The Journal of physical chemistry. Letters, Vol. 5 (5), p. 875-881. eISSN 1948-7185. Article.

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DOI: 10.1021/jz5000403


Hydrodynamic instabilities at the interface between two partially miscible liquids impact numerous applications, including CO2 sequestration in saline aquifers. We introduce here a new laboratory-scale model system on which buoyancy- and Marangoni-driven convective instabilities of such partially miscible two-layer systems can easily be studied. This system consists of the stratification of a pure alkyl formate on top of a denser aqueous solution in the gravitational field. A rich spectrum of convective dynamics is obtained upon partial dissolution of the ester into the water followed by its hydrolysis. The properties of the convective patterns are controlled by the miscibility of the ester in water, the feedback of the dissolved species on its own miscibility, as well as the reactivity of given chemicals in the aqueous solution with the solubilized ester.

Item Type:Article
ID Code:10068
Uncontrolled Keywords:Partially miscible reactive liquids, convective dissolution, traveling fingers, chemo-hydrodynamics, hydrodynamic instability, buoyancy-driven flows, Marangoni flows
Subjects:Area 03 - Scienze chimiche > CHIM/02 Chimica fisica
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Chimica e Farmacia
Publisher:American Chemical Society
Deposited On:03 Sep 2014 15:15

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